Line How common is Johnes disease?
Johne’s disease occurs worldwide. In the U.S. it is estimated that 7.8% of the beef herds and 22% of the dairy herds are infected with M. paratuberculosis. Infection rates in cattle in other countries are generally similar. The disease has been reported in sheep, goats, elk, deer, bison, llamas and wild ruminants in zoos but accurate estimates of the number of infected animals are not available.
