Have separate maternity and hospital pens to reduce exposure to newborn calves. Do not feed potentially contaminated feed from adult cows, including refused feed, to young stock. The risk of infection is greatest in the youngest animals, meaning that it takes a smaller dose of Johne s bacteria to infect a young calf compared to a yearling. Use separate equipment to handle feed and manure. The same tractor should not be used to scrape a cow alley and then be used to push up feed.
Manure is the source of infection.
Reduce crossing cow alleys and feed aleys with vehicles. Again, moving manure from one place to another is the same as moving the Johne s bacteria from one place to another. Keep adult cows and young stock in separate pastures. Provide separate sources of feed and water. Supply clean water to all animals.