Episode 297 - Johne’s Disease: What We’re Learning From Herd Testing - UMN Extension's The Moos Room
The Moos RoomHosted by members of the University of Minnesota Extension Beef and Dairy Teams, The Moos Room discusses relevant topics to help beef and dairy producers be more successful.
In this solo episode, Brad dives deep into Johne’s disease (paratuberculosis), a chronic intestinal illness affecting ruminants, with a particular focus on dairy cattle. Prompted by recent whole-herd milk ELISA testing at the University of Minnesota’s Morris dairy, Brad shares results, trends, and lessons learned from managing Johne’s over the years.
Key topics include:
Clinical signs and long-term impact of Johne’s on milk production and cow longevity
Interpretation of milk ELISA results and testing protocols
Management decisions around culling, beef breeding, and calf-rearing practices
Surprising trends in calf infection sources—including group housing and dam-rearing
Insights from genetic studies showing heritability of Johne’s susceptibility
Practical prevention strategies and the importance of annual testing
Whether you're dealing with Johne’s in your own herd or want to improve your disease prevention approach, this episode is packed with data, reflections, and takeaways to help guide on-farm decisions.
Johnes Disease - APHIS
MN DHIA Johnes Testing
DHIA Laboratories - Johnes Testing
Central Star Johnes Testing
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