Johne's Disease Update

Abstract

Mycobacterium paratuberculosis causes a granulomatous enteritis in cattle that is commonly known as Johne's Disease or paratuberculosis. Young calves acquire the infection in utero or within the first few months of age by the fecal-oral route. Available diagnostic tests have limitations, but when used with appropriate management practices, a control/eradication program can be designed to meet the needs of the producer. Control programs are aimed at minimizing or eliminating exposure to the organism. There is no curative treatment for paratuberculosis.