Seroprevalence of caseous lymphadenitis, Mycobacterium avium subsp. paratuberculosis and small ruminant lentiviruses in U.S. domestic sheep and goat herds

Historically, caseous lymphadenitis (CL), Mycobacterium avium subsp. paratuberculosis (MAP) and small ruminant lentiviruses (SRLV) have been the most common diseases tested for in sheep and goats. The most common reasons for disease surveillance include herd health monitoring, maintaining biosecurity on the farm, diagnosing sick animals and as required for state exhibition/transportation. The objective of this study was to evaluate the seroprevalence for these three diseases through passive surveillance of U.S. domestic sheep and goat serum samples submitted to the Washington Animal Disease Diagnos­tic Laboratory.