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What do I need to know about Johne's disease in beef cattle?
- United States Animal and Plant Health Inspection Service. Veterinary Services. Centers for Epidemiology and Animal Health. and National Animal Health Monitoring System (U.S.)
- APHIS Veterinary Services info sheet 1999
- Paratuberculosis -- United States, paratuberculosis, Mycobacterium avium subsp. paratuberculosis, cattle diseases, and United States
- U.S. Dept. of Agriculture, Animal and Plant Health Inspection Service, Veterinary Services
- USDA publications