GFM Network News


Johne’s disease is tricky to diagnose, because while symptoms include weight loss and lower milk production, no fever or loss of appetite is present.

Developing a vaccine to combat Johne’s disease

Canadian researchers are trialling vaccine candidates, and plan to have results in the fall

Just as researchers around the world are racing to find a vaccine for the COVID-19 virus, Canadian scientists have been diligently working to discover a vaccine that works on Johne’s disease in cattle. “We have successfully established and validated our research model using a commercial MAP vaccine currently licensed for use in Australia and Spain,” […] Read more

Narrowing in on Johne’s Disease

Research on the Record with Reynold Bergen

Johne’s disease is caused by a bacterium (Mycobacterium avium paratuberculosis, or MAP) that was discovered in 1895 by a heavily bearded, bespectacled bacteriologist from Dresden named Heinrich Albert Johne. When a cow develops persistent, watery, smelly hosepipe diarrhea, and progressively loses weight and body condition, even though her appetite is normal and she isn’t running […] Read more


Cow with Johne's disease.

Saskatchewan’s Johne’s Surveillance Program renewed

Animal Health: News Roundup from the October 2018 issue of Canadian Cattlemen

Saskatchewan’s Johne’s Disease Surveillance Program, administered by the Saskatchewan Stock Growers Association (SSGA), has been renewed for another five years with funding from the Canadian Agricultural Partnership (CAP) program. The Ministry of Agriculture developed the surveillance and control program for Saskatchewan cattle in the fall of 2013 but funding ran out under Growing Forward 2 […] Read more

Johne’s found in three per cent of cows in Sask. surveillance program

Health: News Roundup from the September 2017 issue of Canadian Cattlemen

Saskatchewan’s Johne’s Disease Surveillance Program has been very successful in that voluntary participation by cow-calf producers has increased every year to the point where there has been a waiting list the last two years. On the flip side, it has confirmed many participants’ fears of finding positive animals. From November 2013 to March 2017, there […] Read more


Intestinal lesions caused by Johne's disease.

When Johne’s hits home

Dr. Meaghan Crawford’s empathy for the family that discovered Johne’s disease in their young beef herd was evident as she spoke about her involvement with the case during her time as a veterinary student at Calgary. A cow and two heifers showing severe weight loss and diarrhea were brought into the rural clinic where she […] Read more

VIDO-InterVac awarded funding for new cattle vaccines

Bovine tuberculosis and Johne's disease targeted for vaccine development

Work to develop vaccines against two diseases that attack the lungs and intestinal tracts of cattle has received a $2.9 million boost from Genome Canada to co-fund research at the Vaccine and Infectious Disease Organization-International Vaccine Centre (VIDO-InterVac) at the University of Saskatchewan. Bovine tuberculosis affects the lungs of cattle and bison, and wild species […] Read more



Expect decreased production

Project reveals the devastation of Johne's disease to a herd

Dr. Steve Hendrick of the Western College of Veterinary Medicine says the massive U.S. National Johne’s Disease Demonstration Herd Project has shown how devastating Johne’s can be to a herd. There was a considerable loss in adjusted weaning weight in calves coming from dams that were positive for Johne’s,” he says. Data for the 205-day […] Read more


Cow with Johne's disease.

Rapid Johne’s test finds favour in Australia

Meat and Livestock Australia – After more than a decade of research in Australia and overseas, sheep and cattle producers now have a rapid diagnostic test for Johne’s disease, according to a report by Meat and Livestock Australia. The new Johne’s disease (JD) test reduces waiting times for a diagnosis from three months to one week, […] Read more