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JOHNE'S INFORMATION CENTER - University of Wisconsin Ñ School of Veterinary Medicine
Heading: Johnes Information Centerlink: school of veterinary medicine
Heading: What's New

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June 2015

Tuesday, June 23, 2015
Symposium: Treating Crohn's as a MAP infection

A Symposium devoted to treatment of Crohn's disease as a MAP infection is the subject of an International Research Symposium being held August 16, 2015 in Deerfield, IL. Dr. Chamberlin, a U.S. gastroenterologist, and Dr. Amy Hermon-Taylor from the UK will describe recent advances in novel therapies for Crohn's disease based on the principle that this is an infectious disease. Mr. Patrick McLean, Product Manager at Redhill Biopharma Ltd., is also on the program. RedHill is an Israeli biopharmaceutical company that owns RHB-104, a potentially groundbreaking antibiotic combination therapy in oral capsule formulation, with potent intracellular, antimycobacterial and anti-inflammatory properties. RHB-104 is in phase III clinical trials for treatment of Crohn's disease.

Symposium information

February 2015

Monday, February 16, 2015
One Health - MAP - Crohn's Disease

Over 100 years have passed since the Scottish surgeon Dalziel first speculated that the inflammatory bowel disease of humans known as Crohn’s disease has the same underlying trigger as Johne’s disease in animals; namely MAP. This issue is explored in language readily understood by non-scientists in a story posted today on This website provides comprehensive in-depth stories on a wide range of topics. The story on MAP and Crohn’s disease, by Michael T. Collins, was posted today, February 16, 2015. sustains itself, without advertising revenue, by charging a small fee (40 cents) to read each story. A story “teaser”, plus editor’s notes, and a first-hand account of what it is like to live with Crohn’s disease, are provided for free to help readers judge if they want to read more.


Thursday, February 5, 2015
New website concerning MAP and Crohn's disease

A new website has been launched that is devoted to the topic of MAP and it's role in Crohn's disease. People visiting the site are encouraged to watch the 16 minute video on the site's home page.

Anti-MAP website

December 2014

Tuesday, December 9, 2014
RAMP - There’s an App for that!

Need to do a Johne’s herd Risk Assessment and Management Plan (RAMP)? Save trees and time by using an iPad App. The University of Wisconsin, School of Veterinary Medicine, Food Animal Production Medicine team in cooperation with the Johne’s Information Center has created an iPad App that permits entry of RAMP data, creation of herd management recommendations, and submission of the plan by email to relevant veterinary officials without need of a printer or paper. Of course, printing is an option too. The Johne’s RAMP App is one of 8 great Apps designed to help practitioners manage dairy herd health. Click on the link below and you will be taken to the iTunes Store where this App is sold. The time you will save after a single herd RAMP more than offsets its cost. Note: This RAMP App is built on the U.S. model but is quite similar to RAMPs being used in other countries.

Link to App in iTunes Store

August 2014

Thursday, August 14, 2014
Clinical trial for treating Crohn's disease with anti-MAP antibiotics

RedHill BioPharma has initiated a first Phase III clinical trial with RHB-104 (antibiotics directed against MAP) for Crohn’s Disease in North America and Israel. The link provides more information, including a list of clinical centers recruiting patients for the study in the U.S., Canada, and Israel.

Clinical trial detail on website

Monday, August 11, 2014
Proceedings of the 12th International Colloquium on Paratuberculosis

FREE! - the International Association for Paratuberculosis makes the proceedings of all meetings freely available. Proceedings of its most recent meeting held in Parma, Italy June 22-26, 2014 is now online.

12-ICP Proceedings

March 2014

Monday, March 17, 2014
12th International Colloquium on Paratuberculosis (ICP)

Italy will host the most significant international meeting on paratuberculosis, the ICP, June 22-26 in Parma, Italy. The ICP is a meeting of leading researchers, livestock industry representatives, veterinarians and public health authorities with an interest in paratuberculosis (Johne's disease). Scientific sessions will focus on the biology of MAP, pathogenesis and immunology, diagnostics, national control programs, epidemiology and control strategies, concluding with an update on public health and food safety aspects.

Critical dates:
March 31, 2014: Deadline for early registration.
April 30, 2014: Deadline for late registration and hotel reservations.

2014 ICP website

December 2013

Thursday, December 5, 2013
Novel Teaching Tool

A very creative Canadian, Steven Roche, produced a clever video to teach dairy producers about on-farm control measures for paratuberculosis. Steve's interest is in finding new and innovative ways to deliver extension programs. Steve is a PhD Candidate in the Department of Population Medicine at the Ontario Veterinary College working under Dr. Dave Kelton. Check out his "whiteboard" video on YouTube! I think you will be impressed.

You Tube Video

November 2013

Tuesday, November 19, 2013
12th International Colloquium on Paratuberculosis (ICP)

Italy will host the most significant international meeting on paratuberculosis, the ICP, June 22-26 in Parma, Italy. The ICP is a meeting of leading researchers, livestock industry representatives, veterinarians and public health authorities with an interest in paratuberculosis (Johne's disease). Scientific sessions will focus on the biology of MAP, pathogenesis and immunology, diagnostics, national control programs, epidemiology and control strategies, concluding with an update on public health and food safety aspects.

Critical dates:
Now: Registration, hotel reservations and abstract submission open.
January 31, 2014: Deadline for abstract submission.
March 3, 2014: Notification of abstract acceptance.
March 31, 2014: Deadline for early registration.
April 30, 2014: Deadline for late registration and hotel reservations.

2014 ICP website

Tuesday, November 19, 2013
Pilot Program Launches in Ireland

Animal Health Ireland has launched a pilot Johne's control program. Like programs in other countries it involves on farm risk assessments and diagnostic testing. What is notable about the program is the financial support provided by eight dairy processors.

Animal Health Ireland website

May 2013

Wednesday, May 29, 2013
Assessment of MAP in the food supply

TAFS presents an assessment of paratuberculosis and the food supply as a PowerPoint show. In a series of slides TAFS lays out the rationale for taking precautionary measures to limit paratuberculosis on farms as a means of preventing MAP contamination of the food supply.

1) Click on the "Link to TAFS website" (below-right)
2) Click the arrow in the center of the first slide to start the show.
There is no narration.

Note: "Morbus Crohn" (MB), the term used in Europe,
is synonymous with Crohn's disease.

Link to TAFS website

January 2013

Thursday, January 17, 2013
Tackling Johne's around the world
Ken Olsen. Hoards Dairyman, January 10, 2013

While the human risk of contracting Johne's is unclear, many researchers and countries continue to search for new eradication methods.

This article provides some of the highlights of the 11th International Colloquium on Paratuberculosis held in Sydney, Australia in February 2012.

Download article

September 2012

Wednesday, September 26, 2012
Johne's Update from Hoard's Dairyman; September 10, 2012
Johne's prevalence is higher than we thought. Vaccination does not improve production or culling rate but does decrease fecal shedding.

MAP survives quite well in silage. Calving pen management and pasteurization of colostrum and waste milk are most important for effective Johne's control.

Download article

February 2012

Tuesday, February 28, 2012
11-ICP Proceedings.
The full text of all presentations made at the 11th International Colloquium on Paratuberculosis held in Sydney, Australia, February 5-10, 2012 are avaible online. The full proceedings is 412 pages. Articles, most being 1-4 pages, can be viewed individually. Click the IAP link. IAP membership is not required.

Link to IAP website

December 2011

Thursday, December 22, 2011
Johne’s disease.
November issue of Veterinary Clinics of North America – Food Animal Practice.

Volume 27, Issue 3, pages 525-664.

The latest issue of VCNA-FAP is devoted to Johne’s disease and targeted at veterinary practitioners. It’s 13 chapters are authored by 12 experts and cover everything from the fundamentals of epidemiology (Lombard) and pathogenesis (Sweeney) to paratuberculosis control in beef cattle (Roussel), dairy cattle (Garry), small ruminants (Robbe-Austerman), and nondomestic animals (Manning). Additionally, the latest information on genetics of paratuberculosis resistance (Kirkpatrick), treatment (Whitlock), vaccination (Patton), and diagnosis (Collins) are covered in separate chapters. U.S. control programs (Carter) and international efforts to control the disease (Kennedy) are covered in two chapters. One chapter is devoted to food safety concerns related to M. paratuberculosis (Collins). This is the link for those interested in seeing the contents of the issue:

Here is the link on how to order it:

Thursday, December 22, 2011
11th International Colloquium on Paratuberculosis.
Sydney Australia. February 5-10, 2011.

Registration is open for the next international meeting devoted to paratuberculosis. The very latest science by the best international experts in a lovely part of the world.

May 2011

Thursday, May 5, 2011
Match wits with an expert.
New online Johne’s training opportunity!!!

Gain practical experience designing Johne’s control programs without leaving home. This simulation game scores your ability to select the most cost-effective Johne’s control program for five dairy herds each with different MAP infection rates, control objectives and business goals. Your “boss” will grade you against what he considered the best control program for that particular herd and give you feedback on your control plans. If you are good, he’ll make you a partner in his veterinary practice; Dairy Consultants of America.

Here’s what to do:
  1. Register at the UW-SVM CE portal (free)
  2. Enroll in the JD-Consult Simulation course; $80 fee and you earn 2 CE credits.
  3. Listen to your Boss’ instructions, put on your virtual boots, and get to work.

March 2011

Thursday, March 3, 2011
Educational video produced by the Farmer’s Union of Wales (9 min)
(with the assistance of the Johne’s Information Center)

March 3, 2011 This well-made 9 minute video, found on the FUW website listed below, describes the basics of Johne’s disease control in dairy cattle herds.

(Video no longer available from this site)

January 2011

Wednesday, January 5, 2011
Canadian Johne’s Disease Initiative

The Canadian Johne’s Disease Initiative (CJDI) was launched July 1, 2010. The Initiative is funded by Dairy Farmers of Canada (DFC) and the Canadian Cattlemen’s Association (CCA) and has the following priorities: i) Education and awareness, ii) Provincial program encouragement and coordination, iii) Research support and facilitation. For more information, visit their regularly updated website:

September 2010

Thursday, September 30, 2010
New resource for small ruminant managers.

Two helpful brochures focused on managing Johne’s disease specifically for goat and sheep producers have just been released. Feel free to download, print or forward them to your breeder clubs, 4H groups, meat/milk/fleece or fiber production associates.

Goat Owner Q&A

Sheep Owner Q&A

Click here to find both on our handouts page.

Tuesday, September 21, 2010
U.S. Program Standards revised September 1, 2010.

Effective September 1, 2010 the USDA issued updated Uniform Program Standards for the Voluntary Bovine Johne’s Disease Control Program. The most significant changes are in the approved testing strategies and criteria for classifying herds with a lower risk of transmitting MAP. Readers are directed to pages 30-32 of the Program Standards to see how the new six-level program is designed.

Download new Program Standards

June 2010

Tuesday, June 1, 2010
How much is Johne’s disease costing you?

The National Johne’s Education Initiative, with financial support from IDEXX Laboratories, Inc., has developed a simple tool for estimating the cost of Johne’s disease for commercial dairies. The attached brochure, describes how to make the cost calculations for your own herd. To make things even simpler, the authors of this website provide a link to our downloadable Excel spreadsheet to speed the calculations. Just plug in your numbers and the spreadsheet does the math. If you would rather have us do the calculations, simply send us an email at Ask An Expert with the 8 critical information items needed ( *reprinted with permission

Download brochure

May 2010

Tuesday, May 18, 2010
IDEXX laboratories launches new Johne’s disease test approved for use on milk.

IDEXX Production Animal Services announces the North American release of IDEXX® M. pt. Antibody Test Kit for the detection of antibodies for Mycobacterium paratuberculosis (M. pt.) in milk, serum, and plasma samples. Designed to help dairy and cattle producers manage the impact of M. pt., also known as Johne’s disease, this USDA-licensed enzyme-linked immunosorbent assay (ELISA) minimizes the need for retesting ensuring quick turnaround time for producers.

View press release

February 2010

Wednesday, February 10, 2010
Liability for sale of cattle with Johne’s disease.

Different countries and states within the U.S. have differing laws regarding liability for sale of unhealthy animals. Wisconsin law is very specific about this as it pertains to Johne’s disease. The attached summary of a case litigated in Wisconsin illustrates this point.

This link takes you to the relevant Wisconsin Statute:

Case summary PDF

Wednesday, February 3, 2010
An economic decision support tool for simulating paratuberculosis control strategies in a UK suckler herd.
R. Bennett, I. McClement and I. McFarlane, University of Reading, UK.
Preventive Veterinary Medicine 93:286-293, 2010.

A dynamic, deterministic, economic simulation model was developed to estimate the costs and benefits of Johne’s disease control in suckler beef herds, known in the U.S. as cow-calf operations. This is the first such model dealing with beef cattle herds.

The model is available free at:

The publication describing the model is available at:

Link to Model

Wednesday, February 3, 2010
Dr. Rod Chiodini comes out of retirement.

ChiodiniDr. Chiodini, one of the pioneering scientists in the history of paratuberculosis, has come out of retirement to lead a research effort to determine if the relationship between M. avium subsp. paratuberculosis (MAP) and Crohn’s disease is causal or coincidental. Read more about The Crohn’s Disease Initiative at:


Monday, February 1, 2010
Paratuberculosis. Organism, Disease, Control.
Editors: M.A. Behr & D.M. Collins. CABI, Oxford, UK.

Book CoverRecent advances in detection, vaccination and microbial genetics make this a timely book that examines the epidemiology of paratuberculosis, the organism that causes the disease, and practical aspects of its diagnosis and control. It also addresses the link between MAP in in the food chain and human health implications, including Crohn's disease.

Additional information and order form

November 2009

Wednesday, November 18, 2009

Open in YouTube

October 2009

Wednesday, October 14, 2009
Some Johne’s Cows do More Harm Than Others

Hoard's Dairyman CoverBy Terry Fyock, Robert Whitlock, and Raymond Sweeney
Reprinted with permission of Hoard’s Dairyman

The importance of finding and culling cows in a herd that are shedding excessively high numbers of M. paratuberculosis bacteria in their manure, so called “super-shedders”, is described in this article in the October 10, 2009 issue of Hoard’s Dairyman.

View article

July 2009

Thursday, July 2, 2009
International Food Safety Organization Position Paper on MAP

TAFS, noted for its work on BSE, published its first position paper on MAP. The position paper outlines strategies at the farm-, national- and international-levels to limit human exposure to MAP through the food chain. The position paper is available for download from the TAFS website.

TAFS logo

TAFS website

March 2009

Wednesday, March 18, 2009
Healthy Cows for a Healthy Industry
Hoard's Dairyman Cover

The results of a seven year Johne’s disease control field trial in nine Wisconsin dairy herds is the subject of this 12 page special insert in the April 10, 2009 issue of Hoard’s Dairyman. This publication describes the overall results of the project and each of the nine participating herd owners gives their own perspective on the project and Johne’s disease control in general. This project is part of the larger USDA-funded U.S. National Demonstration Herd Project. Major funding agencies for this UW project were the Wisconsin Milk Marketing Board, the USDA-APHIS-VS, and the University of Wisconsin-Madison.

View article

October 2008

Wednesday, October 1, 2008
Johne’s disease still a concern: NAHMS Dairy 2007 indicates awareness high, but national epidemic continues.
Bovine Veterinarian Cover

Four experts comment on NAHMS Dairy 2007 and the growing epidemic. This Bovine Veterinarian article also discusses the latest information on Johne’s disease diagnosis, control and costs.

View article

August 2008

Tuesday, August 12, 2008
Mycobacterium avium paratuberculosis: Infrequent Human Pathogen or Public Health Threat?
ASM logo

People with Crohn’s disease (CD) are seven-fold more likely to have in their gut tissues the bacterium that causes a digestive-tract disease in cattle called Johne’s disease. The role this bacterium may or may not play in causing CD is a top research priority. This report points out that the cause of Crohn’s disease is unknown, and the possible role of this bacterium, which could conceivably be passed up the food chain to people, has received too little attention from the research community.

View press release or the full report is available at this URL:

View press release PDF

May 2008

Monday, May 12, 2008
They tackled Johne’s head-on
Hoards Dairyman Cover

This farm decided to take on Johne’s disease and reduce its grip on their herd . . . and it worked in a big way. Read this story about a successful Johne’s disease control program carried out with financial support from the Wisconsin Milk Marketing Board, the USDA-APHIS-VS, and the University of Wisconsin-Madison.

Download PDF

April 2008

Tuesday, April 15, 2008
USDA NAHMS Dairy 2007 Johne's disease survey results have been released.

The USDA-NAHMS report includes results from NAHMS results from the Dairy 1996, 2002 and 2007 studies on Johne's disease and includes herd level prevalence results through use of environmental culturing. Overall, the study supports peoples' estimates that most herds have some level of infection with 2/3 herds having at least one positive environmental sample; results are also stratified based upon herd size.

Results available at:

View survey results

September 2007

Saturday, September 1, 2007
Mycobacterium avium subspecies paratuberculosis and Crohn’s disease: a systemic review and meta-analysis.
M. Feller et al. The Lancet Infectious Diseases 7(9):607-613, September, 2007.

Abstract: This systematic review assesses the evidence for an association between Mycobacterium avium subspecies paratuberculosis (MAP) and Crohn's disease. We analysed 28 case-control studies comparing MAP in patients with Crohn's disease with individuals free of inflammatory bowel disease (IBD) or patients with ulcerative colitis. Compared with individuals free of IBD, the pooled odds ratio (OR) from studies using PCR in tissue samples was 7·01 (95% CI 3·95–12·4) and was 1·72 (1·02–2·90) in studies using ELISA in serum. ORs were similar for comparisons with ulcerative colitis patients (PCR, 4·13 [1·57–10·9]; ELISA, 1·88 [1·26–2·81]). The association of MAP with Crohn's disease seems to be specific, but its role in the aetiology of Crohn's disease remains to be defined. Full article available at:

Full article

April 2007

Wednesday, April 18, 2007
The 9th Annual International Colloquium on Paratuberculosis

The 9th Annual International Colloquium on Paratuberculosis is October 29 – November 2 in Tsukuba, Japan. IAP Logo On-line abstract submission is now available!  The deadline for abstracts is July 30, 2007.

The main website for the Colloquium is:

The website for poster guidelines is:

Scholarships are available for all students and scientists from developing countries.

Additional details regarding criteria for award selection and application procedures may be downloaded from:
Please note the submission deadline of June 1, 2007. 

March 2007

Wednesday, March 28, 2007
Johne’s: Progress in Small Steps.

Johne’s disease continues to hamper dairy profitability and testing and prevention remain the best weapons. This excellent article reviews the latest information in diagnostic tests including the newest test to become available, the milk ELISA. Prevention and control of Johne’s disease are also nicely summarized.

Download PDF

February 2007

Tuesday, February 20, 2007
ELISA for use with bovine milk samples approved by the USDA.
Prionic’s Parachek® ELISA has been approved by the USDA for use with bovine milk samples. The extended use of this serum antibody detection assay for milk is the first such approval granted by the agency.

View press release

Friday, February 9, 2007
Tetracore Becomes a Sponsor.
We welcome Tetracore to the family of sponsors. Their support helps to sustain and keep current this website. Tetracore offers the first commercial real-time PCR kit for detection of M. paratuberculosis in fecal samples.

Tetracore Logo

Visit their website for more information.

January 2007

Wednesday, January 24, 2007
Johne’s is dairy’s ticking time bomb.
Hoard's Dairyman Cover By Lorraine Stuart Merrill, Hoard’s Dairyman, January 25, 2007

The risks and the opportunities presented by Johne’s disease and the recent high level of funding from Congress are the topic of this well-written editorial.

Download the article

Thursday, January 4, 2007
What is the best test for Johne’s disease?
JAVMA cover A panel of five experts developed consensus recommendations on diagnostic testing for the detection of paratuberculosis in cattle in the United States. These recommendations cover seven specific situations when diagnostic testing is required for dairy or beef cattle herds. These recommendations were accepted by the U.S. National Johne’s Working Group and the Johne’s Disease Committee of the U.S. Animal Health Association. They were published in the December 15, 2006 issue of the Journal of the American Veterinary Medical Association which has agreed to make them publicly available at their website.

December 2006

Thursday, December 14, 2006
9th International Colloquium on Paratuberculosis
Tsukuba Japan will be the site of the next international colloquium on paratuberculosis. This will be the first time the International Association for Paratuberculosis has met outside Europe or the USA. Information about the location and organizational details about the meeting are found at the 9ICP website.
ICP logo

Wednesday, December 13, 2006
JDIP 3rd Annual Conference
ICP logo JDIP is pleased to invite members and interested parties to the JDIP 3rd Annual Conference, to be held at the College of Veterinary Medicine and Biomedical Sciences, Texas A&M University. The conference will be held January 19-21, 2007.

August 2006

Tuesday, August 22, 2006
Proceedings of the 8ICP are now available for purchase.
ICP logo The International Association for Paratuberculosis has published the Proceedings of the 8th International Colloquium on Paratuberculosis held in Copenhagen, August 14-18, 2005. This 734 page book contains the 87 full scientific papers, 180 abstracts and 4 workshop summaries. A limited number of hard copies are available and it can also be purchased on CD-ROM. This link directs you to the order form which can be completed and faxed to the Association’s office.

Order Form

March 2006

Friday, March 24, 2006
Online education: something for everyone.
Wisconsin Department of Agriculture, Trade and Consumer Protection in partnership with the University of Wisconsin, School of Veterinary Medicine and WisTREC provide multiple online Johne’s disease educational opportunities. These easy-to-use narrated modules focus on Johne’s disease control issues for dairy, beef and goat producers. Additional modules addressing Johne’s disease in sheep, deer, llamas and bison will be posted on-line in the near future.

A 2 minute introduction can be seen here (requires Flash player).

All of the online training programs can be found at:;id=133363

The producer modules are also found on the Presentations page of this website:

Wednesday, March 15, 2006
Food safety experts to study Johne’s organism.
Feedstuffs Cover News story about the upcoming NACMCF Committee meeting (described in the March 7 news item below) as published in Feedstuffs magazine. Article reprinted with permission from the March 13, 2006 edition of Feedstuffs.

Download the article

Tuesday, March 7, 2006
U.S National Advisory Committee on Microbiological Criteria for Foods to consider the importance of M. paratuberculosis.
The NACMCF is a large committee that brings together representatives from FDA, USDA, CDC, academia and multiple food industries. It meets March 21-24, 2006 in Arlington, VA. On the agenda for March 23, 8:30 AM to 5:00 PM is work of the Subcommittee on Assessment of the Food Safety Importance of Mycobacterium avium subspecies paratuberculosis, David Acheson, Chair.

For more information, visit the USDA-FSIS website.

For background information about the NACMCF visit this website.

January 2006

Tuesday, January 10, 2006
MORE money for Johne’s disease control in Wisconsin
Last year Wisconsin’s Designated Johne’s Coordinator, Dr. Elisabeth Patton, awarded grants totaling over $270,000 to 87 producers to help upgrade facilities to better control Johne’s disease. Grant money is again available, but producers must act quickly. Applications must be postmarked by January 31, 2006. More information is available in the PDF file below and can be found on the WDATCP website.

Johne's Equipment Grants

November 2005

Tuesday, November 8, 2005
REVISED Uniform Program Standards for the U.S. Voluntary Bovine Johne’s Disease Control Program.
Standards Cover Rules and regulations for operation of the U.S. Johne’s disease control program were updated and made available November 1, 2005. The full document is available here and on the Articles and Brochures page of this website.

USDA Program Standards

October 2005

Thursday, October 6, 2005
Johne’s Education Program Launched
NIAA logoNIAA announced a collaborative effort between industry and government to educate producers, veterinarians, and others involved in dairy and beef production about Johne’s disease.

Web site

September 2005

Tuesday, September 13, 2005
New, rapid test for Johne’s disease.
University of Minnesota logoResearchers at the University of Minnesota report development of a new test for Johne’s disease that is both rapid (72 hours) and accurate. It can be done on either fecal or milk samples.

University of Minnesota webpage

August 2005

Tuesday, August 30, 2005
Money for Johne’s disease control in Wisconsin.
The Wisconsin Designated Johne’s Coordinator recently awarded funds to dairy producers in the state for the purpose of controlling Johne’s disease in their herds. The offer was well received by producers as all available funds were quickly disseminated.

We will post an update on the impact of this program as it becomes available.

June 2005

Thursday, June 30, 2005
Abstracts for the 8ICP available online.
ICP logo The International Association for Paratuberculosis has published online abstracts for the up coming 8th International Colloquium on Paratuberculosis being held in Copenhagen, August 14-18, 2005. Access is free to the more than 240 abstracts from contributors in 33 countries.

View Abstracts

April 2005

Thursday, April 14, 2005
Johne’s Disease on U.S. Dairy Operations - 2002.
Report cover The U.S. Dept. Agriculture published its most recent study on Johne’s disease in the U.S. The 178 page report is a wealth of information. It provides survey results about risks for M. paratuberculosis transmission on U.S. dairies, diagnostic testing practices, test accuracy, test agreement, and estimation of the prevalence of M. paratuberculosis infection among the dairies selected for study. The document is free to download as a pdf file but be warned – it is very large (5MB) and so takes considerable time to download depending on your internet connection speed. Report cover

USDA web site for downloading file

Wednesday, April 6, 2005
8th International Colloquium on Paratuberculosis.
ICP logo The International Association for Paratuberculosis announced that its next Colloquium which will be held August 14-18, 2005 in Copenhagen Denmark. IAP colloquia bring together scientists from around the world who report on every aspect of paratuberculosis research and national control programs. More information is available on the web

November 2004

Tuesday, November 16, 2004
UK publishes booklet on Johne’s control in dairy herds.

Booklet coverLast week the UK’s Department of Environment and Rural Affairs (DEFRA) published a 12 page booklet advising dairy producers how to control Johne’s disease. It is available free of charge at the link provided here.

Link to booklet.

September 2004

Tuesday, September 21, 2004
Culture of Mycobacterium avium subspecies paratuberculosis from the blood of patients with Crohn's disease.

The following study concerning MAP and Crohn's disease was reported in the Lancet recently.

Summary: Crohn's disease, a form of inflammatory bowel disease, resembles some aspects of tuberculosis, leprosy, and paratuberculosis. The role of Mycobacterium avium subspecies paratuberculosis (MAP) in Crohn's disease is controversial. Tested for MAP was completed by PCR and culture in buffy coat preparations from 28 individuals with Crohn's disease, nine with ulcerative colitis, and 15 without inflammatory bowel disease. MAP DNA in uncultured buffy coats was identified by PCR in 13 (46%) individuals with Crohn's disease, four (45%) with ulcerative colitis, and three (20%) without inflammatory bowel disease. Viable MAP was cultured from the blood of 14 (50%) patients with Crohn's disease, two (22%) with ulcerative colitis, and none of the individuals without inflammatory bowel disease. Current use of immunosuppressive medication did not correlate with a positive MAP culture. Sequencing of PCR products from MAP cultures confirmed the presence of the MAP specific IS900 fragment.

Lancet web site

August 2004

Tuesday, August 10, 2004
M. paratuberculosis found in U.S. milk.

Viable (living) M. paratuberculosis organisms (the mycobacterium that causes Johne's disease), were found in low numbers in commercially pasteurized milk purchased from stores in California, Minnesota and Wisconsin according to research conducted by Dr. Jay Ellingson, Marshfield Clinic Laboratories, Marshfield, WI, USA . Of 702 samples tested, 2.8 percent contained viable M. paratuberculosis organisms. This study's results agree with previous research conducted in Great Britain and were presented recently at the International Association for Food Protection conference. The full study will be presented at the International Colloquium on Paratuberculosis, Aug. 14 - 18, Copenhagen, Denmark ( ).

Study factsheet

July 2004

Thursday, July 1, 2004
Waste milk, milk replacer or pasteurized waste milk Magazine Cover

This excellent article describes the biosecurity benefits and costs of each method of feeding calves. A table nicely compares the estimated time to recover pasteurizer purchase costs and operating expenses for farms having 50 to 1,000 calves per year. Seven research papers on pasteurizers are listed for those wanting to read more

View article

Thursday, July 1, 2004
8th International Colloquium on Paratuberculosis.
ICP logo The International Association for Paratuberculosis announced that its next Colloquium which will be held August 14-18, 2005 in Copenhagen Denmark. IAP colloquia bring together scientists from around the world who report on every aspect of paratuberculosis research and national control programs. More information is available on the web.

March 2004

Wednesday, March 17, 2004
Johne's disease education online.
CE Portal Screen ShotThe University of Wisconsin School of Veterinary Medicine has created online education opportunities in Johne's disease. The education is primarily targeted to veterinarians and designed to satisfy their continuing education (CE) requirements, however, anyone is welcome to take the CE modules. Individual CE courses are available and multiple courses also are packaged into certificate programs tailored for specific U.S. states. Completion of these programs grants a certificate and the title "Johne's Certified Veterinarian". Certified veterinarians can perform herd risk assessments and write herd management plans in support of state and U.S. federal Johne's disease control programs. Visit the UW-SVM CE portal for more information.

Tuesday, March 9, 2004
Continuing education articles on Johne's disease.
IVJ coverThe Irish Veterinary Journal ran a series of three articles on Johne's disease in the continuing education section of the journal (Nov. and Dec. '03 and Jan. '04 issues). The core content for the articles originated from this website. With permission of the publisher, these articles (pdf files) are posted on the Authors' Page of this website.

To the authors' page.

December 2003

Monday, December 8, 2003
OJD found in Western Australia.
Ovine Johne's disease, a chronic, incurable bacterial disease of sheep, was detected in Western Australia this week, but should not affect its "free zone" status.

Victorian ministerial OJD advisory committee chairman Frank Tobin said while low levels of infection may exist, it could take years to detect. Tobin added that the industry should not overreact after a West Australian property was quarantined following the discovery of several sheep suffering from OJD.

"It's very easy to lose producer support if you overreact and we shouldn't presume this is any more than it is," he said. "It won't alter Victoria's view of Western Australia and that is, that they have a low level of infection. What we'll be keen to see is the follow-up and the flow-on effects."

The WA Department of Agriculture chief veterinary officer Peter Buckman said the outbreak in the state's central region would be investigated.

Western Australia is the only state recognized under national rules as an OJD "free zone" and is expected to maintain that status.

September 2003

Tuesday, September 30, 2003
New Johne’s CD ROM and Website.
The United States Animal Health Association (USAHA) now has a valuable new educational tool for use by animal health professionals involved with the control of Johne’s disease titled “Johne’s and Beyond”. The CD ROM contains 25 sets of PowerPoint slides and other essential information on this disease. The first edition of the CD ROM will be provided free for subscribers to the password-protected website. The annual subscription fee is $50. New PowerPoint slide sets and other pertinent information will be posted on the website as they become available. They will be included on an updated 2nd edition of the CD that is expected within the next two years. This CD ROM has been produced in association with a number of major sponsors including the U.S. Department of Agriculture and the American Veterinary Medical Association.
USAHA web site
To order your subscription and obtain a CD contact:
Linda Raglund
P.O. Box K227
Richmond, VA 23299
phone(USA): 804-285-3210
fax: 804-285-3367

USAHA web site

August 2003

Thursday, August 28, 2003
Johne's disease - Crohn's disease connection?
The August 2003 issue of the medical journal The Lancet Infectious Diseases (volume 3, pages 507-514) has an article by Dr. Robert J. Greenstein, Dept. Surgery, VMAC Bronx, Bronx NY USA, in the Personal View section titled: "Is Crohn's disease caused by a mycobacterium? Comparisons with leprosy, tuberculosis, and Johne's disease." The article is in the form of a review but also presented as a professional opinion. It is a useful compilation of many research publications and has 148 references. The abstract of the article can be viewed on the Lancet web site.

Lancet web siteA reprint of the full article can be obtained from the publisher as a pdf file for US$30, after registering on The Lancet website:

Lancet web site

Tuesday, August 19, 2003
U.S. National Academy of Sciences Report. Report cover
The U.S. National Academy of Sciences, Board on Agriculture and Natural Resources has released its report titled Diagnosis and Control of Johne's Disease. This 229 page report is available in hard copy for US$37.60.

Order this report.

Tuesday, August 19, 2003
M. paratuberculosis found more often in Crohn's patients. JCM web site
A British research group reported finding genetic evidence of the presence of the animal pathogen in tissues from 92% (34/37) Crohn's patients studied vs. 26% (9/34) control tissues. The living organism was isolated from 42% (14/33) of Crohn's patient tissues vs. 3/33 or 9% of controls. The July 2003 Journal of Clinical Microbiology abstract is here:

JCM web site.

July 2003

Tuesday, July 29, 2003
The American Jersey Cattle Association works to stop the spread of Johne's disease. AJCA web site
The AJCA now requires that cattle consigned to national sales be test-negative for Johne's disease within the past year. This move adds Johne's disease to the list of infectious diseases for which consignors must test cattle. We commend the AJCA for its efforts to halt the spread of Johne's disease. For more information contact the AJCA at:

AJCA website

June 2003

Wednesday, June 25, 2003
Proceedings of the 7th International Colloquium on Paratuberculosis. ICP web site
The 7ICP was held in Bilbao, Spain June 11-14, 2002. The meeting had 273 participants from 31 countries. The Proceedings of the 7ICP summarizes research presented at the meeting in the form of 98 oral and 114 poster presentations. The 554 page books is now available for purchase from the website of the International Association for Paratuberculosis.

To the IAP website.

February 2003

Wednesday, February 12, 2003
U.S. National Academy of Sciences Report. The U.S. National Academy of Sciences, Board on Agriculture and Natural Resources has released its report titled Diagnosis and Control of Johne's Disease. This 218 page report is available on line.

NAS Logo

View Report.

Thursday, February 6, 2003
Biosecurity Presentation. Biosecurity sign

Preventing infection of dairy herds by viral and bacterial pathogens is called biosecurity. This mini-lecture describes the costs and benefits of a sound biosecurity program using many different disease examples, including Johne's disease.

View Presentation.

Thursday, February 6, 2003
New decision-making tool for Johne's. Magazine Cover

In two articles in Dairy Herd Management, Maureen Hanson describes a simple system for testing cows at the tail end of lactation to help make cost-effective culling decisions and calving management changes to help control Johne's disease in dairy herds.  Interviews with two producers support the value of the decision making system.

View both articles.

January 2003

Monday, January 6, 2003
Johne's Disease Conference. IZS logo

The Wisconsin Herd Health Working Group will sponsor a conference, Management is The Key to Controlling Johne's Disease, on Thursday, January 16, 2003, at the Holiday Inn Select, Appleton, Wisconsin. The one-day conference will bring producers and veterinarians together in roundtable discussions and will feature Johne's Disease industry experts.

Visit the conference
web site.

December 2002

Friday, December 27, 2002
New Sponsor. Acquire logo

We are pleased to welcome APC, Inc. as a new sponsor. APC, Inc. manufactures Acquire colostrum replacer, a useful tool in preventing the spread of Johne's disease.

Visit the Acquire web site.

Friday, December 20, 2002
Canada moves forward with a Johne's disease program. The Ontario Dairy Farmer reported that a voluntary national program, similar to those in Australia, The Netherlands and the U.S. will begin in early 2003.

View news article.

Wednesday, December 18, 2002
Johne's disease: new developments. Midwest DairyBusiness January 2003 Cover

by Dave Natzke, Midwest DairyBusiness, January 2003.

This article reviews Johne's control methods, highlights some new research findings and describes the conference on Johne's disease to be held January 16 in Appleton, Wisconsin.

View article.

Wednesday, December 18, 2002
Prevent the spread of Johne's disease in your herd. Hoard's Dairyman December 2002 cover

A newly released article in Hoard's Dairyman by Laura Moser describes ways to control the spread of Johne's disease in dairy herds.  Interviews with experts and producers support the article.

View article.

Wednesday, December 18, 2002
Biosecurity on dairies - are we doing enough? VitaPlus Summit Cover

The VitaPlus Dairy Summit 2002 meeting was held in Minnetonka, Minnesota, December 12-13, 2002.  The proceedings handout concerned biosecurity in general and Johne's disease prevention in particular and is provided here.

View Collins' handout from the Summit proceedings.

November 2002

Thursday, November 21, 2002
Scientists Crack Genome Sequence Of M. paratuberculosis. University of Minnesota researchers, with collaborators at the U. S. Department of Agriculture?s National Animal Disease Center in Ames, IA, have completed sequencing the genome of the bacteria that causes Johne?s disease.

View the entire press

October 2002

Tuesday, October 15, 2002
International Conference on Crohn's disease and paratuberculosis. IZS logo

Rome, Italy, January 24-25, 2003.  The Instituto Zooprofilattico Sperimentale Regioni Lazio e Toscana is hosting the international conference.  Featured speakers include Prof. John Hermon-Taylor (UK), Prof. Ivo Pavilk (CZ), Dr. Ramon Juste (ES), and Prof. Leonardo Sechi (IT) plus several other Italian experts in the field.  The attached preliminary program announcement provides contacts for more information.

Download program.

Thursday, October 3, 2002
M. paratuberculosis and Crohn's disease. The University of Ottawa is hosting a meeting titled: " A MAP for Crohn's disease. Mycobacterium avium subspecies paratuberculosis and Crohn's disease: Is there evidence for causation?". The meeting will be held Tuesday, October 8, 2002 from 1:00 - 5:00 pm in Amphitheater B of the Roger Guidon Hall at the University of Ottawa, 451 Smyth Rd. Ottawa, Ontario, Canada. For further information visit or open the meeting announcement.

Open the meeting

September 2002

Wednesday, September 25, 2002
M. paratuberculosis and food safety. UW Extension logo

University of Wisconsin Extension is hosting a special forum titled: Emerging Issues in Food Safety, October 17, 2002 in River Falls, WI. Five of the 10 presentations concern M. paratuberculosis. Experts from N. Ireland, New Zealand and Canada are on the program. The attached meeting announcement provides the full program and registration details.

Open the meeting

Wednesday, September 11, 2002
Abstracts - International Colloquia on Paratuberculosis. IAP Logo

Abstracts of the 3rd, 4th, 5th, 6th, and most recent, 7th, International Colloquium on Paratuberculosis are available on the website of the International Association for Paratuberculosis.

IAP web site

August 2002

Friday, August 2, 2002
Paratuberculosis in a primate. Cover of JVDI Journal

A case report of paratuberculosis in a mandrill baboon is described in the July issue of the Journal of Veterinary Diagnostic Investigation. A reprint of the article is attached (with permission of the authors and journal editor).

Download the 3 page article.

July 2002

Friday, July 12, 2002
U.S. House of Representatives approves $20 million for Johne's. The House Agriculture Appropriations Subcommittee approved $20,352,000 for the National Johne's Disease Management and Testing Program. The money will be used for testing during the first year of the program. A provision in the original plan to pay producers fair market value for animals that test positive and are culled did not receive funding. The full House Appropriations Committee is expected to take action this week. Although the Senate has yet to approve funding for the Johne's program, approval is not expected to be a problem.

Monday, July 1, 2002
M. paratuberculosis infection in a patient with HIV.  Cover of CDC's Emerging Infectious Diseases Journal

A German research team reports the first case of human infection with M. paratuberculosis in a patient with HIV in Emerging Infectious Diseases (vol. 8, no. 7, July 2002).  The article is available on line at the CDC website.

CDC website

May 2002

Wednesday, May 15, 2002
USDA publishes uniform methods and rules. The U.S. Dept. of Agriculture published a document titled: Uniform Program Standards for the Voluntary Bovine Johne's Disease Control Program. This 28 page document provides standard definitions, methods and rules for states wanting to adopt a system for classifying herds based on the likelihood they are NOT infected (generically referred to as a herd certification program).

Download the 28 page
standards document.

April 2002

Tuesday, April 23, 2002
7th International Colloquium on Paratuberculosis. ICP logoSpain will host the next international meeting devoted exclusively to M. paratuberculosis. The announcement, meeting description and registration information can be found on the interesting and informative website the host agency, NEIKER, has created.

You may also download
a copy of the brochure.

March 2002

Friday, March 29, 2002
New Sponsor. We are pleased to welcome Goodnature Products, Inc. as a new sponsor.Goodnature Products, Inc. logo Goodnature designs and manufactures pasteurizers that are available in a variety of sizes to accommodate the needs of your facility.

Visit the Johne's sponsorship page
to view all sponsor web pages

February 2002

Tuesday, February 26, 2002
Manual for Herd Plan Development. SCI brochureThis 14 page manual for dairy herds provides a guide for collecting a herd history, estimating herd prevalence, analyzing risk factors for Johne?s disease transmission, and developing a control and prevention plan.

Download the 14 page manual.

January 2002

Friday, January 18, 2002
Mycobacterium paratuberculosis: impact on human health and the dairy industry.  SCI brochure April 10, 2002 the Department of Food Science, Queen's University, Belfast, UK is hosting a meeting organized by the SCI (Society of Chemical Industry) Food Commodities & Ingredients Group.  The one-day program features eight international experts.  (Prepare for a slow download as the brochure is a 7 MB pdf file.)

Download the 4 page brochure
and registration form.

December 2001

Monday, December 3, 2001
Calf milk pasteurization. This new article from Bovine Veterinarian demonstrates how pasteurization of milk fed to calves is a successful strategy to control the spread of Johne's disease, as well as several other infectious diseases, from cows to calves. It describes the process of pasteurization and some of the economic and logistic issues important to consider.

Download the 5 page

November 2001

Monday, November 19, 2001
Senators introduce legislation to eradicate Johne's disease. U.S. Senators Russ Feingold and Herb Kohl today introduced legislation "to establish a voluntary program designed to provide incentives to encourage dairy producers to voluntarily begin testing for Johne's disease and to remove infected and exposed animals from their dairy herds. This legislation is based on the recommendation of the National Johne's Working Group and would be voluntary and confidential," according to a news release from Feingold's office.

Visit the Dairyline website
for the complete story.

October 2001

Monday, October 1, 2001
New Sponsorship!  The Johne's Information Center is pleased to announce two new sponsors.

Milk Products, Inc. is a market and customer-driven company dedicated to the development, production, distribution, marketing and servicing of quality milk replacers and other young animal products worldwide through independent feed manufacturers and distributors.

Hoard's Dairyman  has, for over 100 years, provided continuous, reliable service and courageous leadership in a magazine for the nation's dairy farmers.

Visit the Johne's sponsorship page
to view all sponsor web pages

September 2001

Sunday, September 30, 2001
New Sponsorship!  The Johne's Information Center is pleased to announce two new sponsors.

Milk Products, Inc. logoMilk Products, Inc. is a market and customer-driven company dedicated to the development, production, distribution, marketing and servicing of quality milk replacers and other young animal products worldwide through independent feed manufacturers and distributors.

Hoard's Dairyman logoHoard's Dairyman  has, for over 100 years, provided continuous, reliable service and courageous leadership in a magazine for the nation's dairy farmers.

Visit the Johne's sponsorship page
to view all sponsor web pages

Saturday, September 29, 2001
Series of articles about Johne's Disease. Recently Angus Journal published a series of articles relating to Johne's in three separate issues. The Cattle Industry's Next Big Test addresses the advantages of structured testing and certification programs. Means to an End covers the complex testing process. And Prepare for Battle deals with prevention.

Visit the articles/brochures page
to view more articles.

Thursday, September 27, 2001
Irradiation destroys Johne's in milk. An article in the September issue of Dairy Herd Management reports on preliminary findings of a joint research between Colorado State University and the National Animal Disease Center.  Their studies indicate that the bacterium that causes Johne's, M. paratuberculosis, can be killed with 5 kGy of irradiation.  Pinpointing the lowest possible dose of irradiation needed for 100% kill and the impact on milk quality remain to be determined.

Download the following 1 page

August 2001

Sunday, August 26, 2001
Crohn's: An autoimmune or bacterial-related disease? An article in The Scientist (volume 15, page 22, Aug. 20, 2001) concisely describes discovery that mutations in the NOD2 gene are associated with Crohn's disease in roughly 15% of patients. The article also outlines evidence for involvement of other genes in the pathogenesis of Crohn's disease such as those involving the major histocompatibility complex. It concludes by outlining the debate on M. paratuberculosis involvement in this disease and recent activities by the U.S. National Institutes of Health on this topic. (To access this site you will have to register. Registration is free of charge.)

View this article on The Scientist's
web site.

Friday, August 24, 2001
Control of M. paratuberculosis in milk. The Food Standards Agency of the U.K. has posted a summary of their May 23 & 24, 2001 conference on this topic. The committee noted that the risk to human health has not been established, and did not recommend any change in the current advice regarding the consumption of milk. They note that the full conference report will be available on their website shortly.

For more information

July 2001

Monday, July 30, 2001
International Association for Paratuberculosis

Sunday, July 29, 2001
International Regulations on Johne's disease (paratuberculosis)

Saturday, July 28, 2001
Paratuberculose (paratbc)
Gezondeindsienst voor Dieren (Animal Health Service of
The Netherlands)

Friday, July 27, 2001
Johnes Information Centre
Animal Health Australia

Thursday, July 26, 2001
Tuberculosis Y Paratuberculosis
Facultad de Veterinaria. Universidad de León

Wednesday, July 25, 2001
Paratuberculosis en ciervo colorado

Tuesday, July 24, 2001
Canadian information on Johne's disease Saskatchewan Agriculture and Food

Tuesday, July 3, 2001
Proceedings of the Workshop on Diagnosis, Prevention and Control of Johne's disease in Non-domestic Hoofstock

288 KB

Tuesday, July 3, 2001
Johne's testing: a small investment with big benefits JoDee Sattler, Midwest Dairy Business, April, 2001

827 KB

Tuesday, July 3, 2001
Practical protocols Paula Mohr, Dairy Today, July 2000.

108 KB

Tuesday, July 3, 2001
4 ways to minimize disease during expansion Kimberlee Schoomaker, Dairy Herd Management, November 2000.

300 KB

Tuesday, July 3, 2001
Got milk?™ No, I've got BVD, Johne's heel warts, mastitis..... Dr. Greg Quakenbush Jack Wiley, Midwest Dairy Business, November-December 1998

4.3 MB

Tuesday, July 3, 2001
Test your cows for Johne's disease JoDee Sattler, Midwest Dairy Business 2000

5.3 MB

Tuesday, July 3, 2001
Raising calves - The 5 Cs of a healthy start Wisconsin Herd Health Working Group, July 2000

180 KB

Tuesday, July 3, 2001
Johne's disease control strategies Geni Wren, Bovine Veterinarian, May-June 1998.

324 KB

Tuesday, July 3, 2001
Johne's can be managed Paula Mohr, Dairy Today, November/December 2000

67 KB

Tuesday, July 3, 2001
The real cost of Johne's Kim Bower-Spence, Dairy Today, July 2000.

40 KB

Tuesday, July 3, 2001
Immunology of the calf Geni Wren, Bovine Veterinarian, February 1996.

600 KB

Tuesday, July 3, 2001
Answers to pasteurization questions Dr. Marguerita B. Cattell, Dairy Herd Management, November 1999.

28 KB

Tuesday, July 3, 2001
Johne's program - where they're at Geni Wren, Bovine Veterinarian, January 2001

828 KB

Tuesday, July 3, 2001
Wisconsin Johne's disease regulations Wisconsin Herd Health Working Group, July 2000

180 KB

Tuesday, July 3, 2001
Lack of harmonization threatens Johne's control efforts Editorial by Thomas J. Quaife, Dairy Herd Management, July 1999.

20 KB

Tuesday, July 3, 2001
Diagnosis of Johne's disease in cattle Mike Collins, Hoard's Dairyman, March 25, April 10 & 25, 2001.

432 KB

Tuesday, July 3, 2001
Possible links between Crohn's disease and paratuberculosis The European Commission Directorate

597 KB

Monday, July 2, 2001
Consider on-farm Johne's testing Kimberlee Schoomaker, Dairy Herd Management, February 2000.

276 KB

Monday, July 2, 2001
Johne's Disease found in Kangaroos Primary Industries and Resource SA

12 KB

Sunday, July 1, 2001
Testing for Johne's disease Geni Wren, Bovine Veterinarian, July-August 1998.

484 KB

Sunday, July 1, 2001
Aim for Johne's eradication Kimberlee Bungert, Dairy Herd Management, December 1997.

3.5 MB

June 2001

Monday, June 18, 2001
Are Johne's and Crohn's connected? Science has yet to prove what causes Crohn's disease in humans.  Some believe M. paratuberculosis-infected animals are to blame.  This article concisely reviews both sides of this controversial issue.  Excellent side bars provide more information.  One is titled: "Does pasteurization kill MAP [M. paratuberculosis]?.  Another is titled: "What producers can do in the fight against Johne's".  And a third is titled "The fight against Crohn's disease".

Download the following 3 page

Wednesday, June 13, 2001
CAST issue paper on Johne's disease The Council on Agricultural Science and Technology (CAST) has published an issue paper (number 17, May 2001) titled "Johne's Disease in Cattle". The report summarizes the status of bovine Johne's disease in the USA. This 10 page report prepared by seven member task force and reviewed by a panel of three independent experts is a concise overview of the current situation in the U.S.. 

Download the following 10 page
Issue Paper.

Tuesday, June 12, 2001
Diagnosis of Johne's disease in cattle This is a compilation of three articles in Hoard's Dairyman describing laboratory tests for Johne's disease and how they can be interpreted and used to control the disease in dairy herds.

Download all three articles
as a single file.

May 2001

Friday, May 18, 2001
Johne's disease found in Kangaroos Interim laboratory results from veterinary research on Kangaroo Island, S. Australia have shown that two kangaroos and two wallabies have tested positive for the presence of Ovine Johne's disease (OJD) bacteria.

Download the following 1 page
press release.

April 2001

Saturday, April 21, 2001
Educate yourself about Johne's Test your knowledge of Johne's disease. See if you can answer these seven frequently asked questions. Answers to the questions from the leading U.S. experts are provided in this article.

Download the

Sunday, April 1, 2001
Johne's testing: a small investment with big benefits This article describes how the Selz-Pralle dairy in Humbird, Wisconsin use tests for Johne's disease to 1) limit the risk of introducing infected animals into their herd and 2) eliminate this infection that got into their herd during a herd expansion. This is an excellent real world example of the kind of prevention and control programs outlined on this website.

Download the following 3 page

March 2001

Wednesday, March 21, 2001
New book published The Office International des Epizooties (O.I.E.) today announced publication of a book titled "Mycobacterial Infections in Domestic and Wild Animals". Two chapters in this 15 chapter, 352 page book concern M. paratuberculosis. For more extensive description of the book contents and ordering information go to the OIE website.

Thursday, March 1, 2001
Wisconsin Johne's herd status update July 1, 2000 Wisconsin started a bold plan to classify all cattle herds in the sate based on laboratory test data. In spite of low milk prices that have dampened herd owner's desire to spend money on herd testing, many herds have already been tested and most were found to be test-negative for Johne's disease. The number of herds in each herd classification are shown on the attached graph. Specific rules regarding the herd classification system can be found in a handout available on this site.


January 2001

Thursday, January 18, 2001
"Johne's program - where they're at" The January issue of Bovine Veterinarian has an article by Geni Wren describing the situation in different U.S. states regarding Johne's herd status (certification) and control program. The story contrasts what the U.S. is doing compared to other countries. Actions the USDA is planning to take are outlined and the policy position on Johne's disease of the National Cattlemen's Beef Association is provided.

Download the following 4 page
document containing the article.

Tuesday, January 16, 2001
New book on M. paratuberculosis The International Dairy Federation has published a monograph resulting from a year of work by its Task Force on M. paratuberculosis. The book reviews the basics of diagnosis and control of Johne's disease and the biology of M. paratuberculosis. It nicely summarizes methods to detect and enumerate M. paratuberculosis in milk and other dairy products and provides the most up to date information on what is known about the effect of pasteurization on this organism. It is primarily a technical report of interest to specialists in the field of paratuberculosis.For ordering information, visit the IDF website listed here and look under "forthcoming publications". The book first becomes available January 27, 2001.

November 2000

Monday, November 27, 2000
AAVLD meeting abstracts on M. paratuberculosis The annual meeting of the American Association of Veterinary Laboratory Diagnosticians was held in Birmingham, Alabama USA October 19-22, 2000. Fourteen oral or poster presentations at the meeting concerned M. paratuberculosis. Most concern new diagnostic tests for Johne's disease. The abstracts for these presentations are available here.

Download the following 15 page
document containing the abstracts

Sunday, November 12, 2000
CRWAD meeting abstracts on M. paratuberculosis: The 81st annual meeting of the Conference or Research Workers in Animal Disease was held in Chicago, November 12-14, 2000. Ten oral or poster presentations concerned M. paratuberculosis. The abstracts for these presentations are available here.

Download the following 7 page
document containing the abstracts.

October 2000

Thursday, October 19, 2000
Proposed indemnity program in U.S. The title is "National Voluntary Johne's Indemnity for Dairy Cattle". The purpose is to compensate herd owners $900/animal for cattle slaughtered after finding them test-positive for Johne's disease. This change in the CFR was first presented at the 2000 U.S. Animal Health Association meeting in Birmingham, Alabama October 18, 2000. Further discussion will take place at the next NJWG meeting held in conjunction with the National Institutes for Animal Health meeting, April 2-5, 2001, Antlers Adamsmark Hotel, Colorado Springs, CO.

Wednesday, October 18, 2000
USDA proposes Uniform Methods and Rules to operate a Voluntary Bovine Johne's Disease Control Program. These rules were first presented at the 2000 U.S. Animal Health Association meeting in Birmingham, Alabama October 18, 2000.

Download the following 17 page
document for a detailed description.

Monday, October 16, 2000
Genetic resistance to Johne's in dairy cattle University of Wisconsin research team enlists the help of hundreds of U.S. dairy producers to search for markers of genetic resistance to Johne's disease in dairy cattle.

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