Johne's disease more common in goats than realized.
Johne’s disease is a bigger problem in goats than many owners and veterinarians realize. Among all laboratory submissions to the JTC in 2017, 10.5% were PCR-positive and 4.9% were ELISA-positive giving a rough idea of the prevalence of MAP infections. The difference in positivity rates for PCR and ELISA reflect the roughly 3-fold higher diagnostic sensitivity of PCR. The fecal pooling strategy is a cost-effective, whole-herd testing strategy for herds with a low or zero MAP-infection prevalence.
It is critical that paratuberculosis in goats be recognized and effectively dealt with before it becomes endemic. In the early 20th century when Johne’s disease was first reported in U.S. dairy cattle, producers were warned about this contagious, infectious disease, and most decided to ignore it rather than stomping it out before it became a bigger problem. A lesson learned the hard way.