Jul 23, 2014
Home| Tools| Events| Blogs| Discussions| Sign UpLogin

Control Johne''s

June 16, 2008
 
 
 

Johne's disease is on the increase. Research shows that one out of 10 animals moving through livestock auction facilities has Johne's disease, with infection rates at one out of about four dairy herds.

The single most significant hazard of maintenance and spread of infection are the subclinical animals—those that have the bacterium but have yet to exhibit clinical signs, say Bob Whitlock, a University of Pennsylvania veterinarian.
 
"The most prevalent transmission method within herds is fecal-oral,” adds Scott Wells, a University of Minnesota veterinarian. "Two other common transmission methods are via colostrum and milk to calves and transplacental.

"If there's fecal material around anywhere, the opportunity for the organism's presence is there—and it's a risk,” he says.
 
Researchers have found that it takes only a tiny bit of contaminated feces to infect herdmates and newborn and young calves. In fact, a calf can become infected from simply sucking on a contaminated teat.

Management practices are the preferred method of control for two key reasons: Treatment has not been shown to be effective, and vaccinating to protect animals against Johne's is not a viable option at this point.
 
To control Johne's:

  • Remove clinically ill cows.
  • Calving cows in a clean area.
  • Raise replacement heifers separately from older cows and only add low-risk herd replacements—perhaps even limiting herd additions to animals from a test-negative herd.
  • Feed calves either milk replacer or pasteurized milk.
     
Such practices can reduce prevalence of Johne's by as much as 50%, says Wells. He urges producers to learn more about Johne's by talking to their veterinarians and to become involved in the Voluntary Bovine Johne's Disease Control Program in their state.

Bonus content:

See Comments

FEATURED IN: Dairy Today - June/July 2008
RELATED TOPICS: Dairy, Follow the Dot

 
Log In or Sign Up to comment

COMMENTS

No comments have been posted



Name:

Comments:

Receive the latest news, information and commentary customized for you. Sign up to receive Dairy Today's eUpdate today!

 

MARKETS

CROPSLIVESTOCKFINANCEENERGYMETALS
Market Data provided by Barchart.com
 
 
 
The Home Page of Agriculture
© 2014 Farm Journal, Inc. All Rights Reserved|Web site design and development by AmericanEagle.com|Site Map|Privacy Policy|Terms & Conditions