Commentary: Considering Test Results in Context

by: Equine Disease Quarterly
KNOWLEDGE IS POWER. Actually, it's much more accurate to say "Factual knowledge in context is power." Polymerase chain reaction (PCR) testing is an extremely sensitive test for biologic agents in horses. However, a positive PCR for Salmonella can indicate either the presence of live bacteria in the sample or dead bacteria with DNA still present. So, is the horse actively shedding live ...