Johne’s disease is a chronic, debilitating enteritis of ruminants caused by infection with Mycobacterium paratuberculosis. During the active stage of the infection and prior to onset of clinical disease, animals generally develop antibodies to M. paratuberculosis antigens. Uninfected animals lack specific antibodies to M. paratuberculosis.
Our ELISA test LSIVet detects antibodies to M. paratuberculosis in serum in cattle, goats and sheep. PARACHEK 2 is highly specific (>99%), sensitivity is less and varies among species. Sensitivity for cattle, goats, and sheep are approximately 80, 77, and 41%, respectively. It is recommended that Johne's testing is done on animals that are at least 18 months old.
A positive result indicates the animal is likely to be infected with M. paratuberculosis and that there are potentially other infected animals in the herd.