As a result, the Johne’s Disease Information Center at the University of Wisconsin – Madison says, “over 50 per cent of dairy herds in most major dairy producing countries are now MAP-infected. The official estimate in the U.S. from a survey conducted in 2007 and published in 2013 is that 91 per cent of U.S. dairy herds are infected. This is up from USDA’s 1996 estimate that 21.6 per cent of U.S. dairy herds have paratuberculosis.”
University Communications