Comparison of Conventional and Delayed Secondary Enrichment for Isolation of Salmonella Spp. from Swine Samples

source of human infection. 3 Recent United States Department of Agriculture surveys to determine the incidence of Salmonella organisms on US pig farms isolated Salmonella spp. from at least one fecal sample and one feed ingredient from 38.2% and 46.7% of the operations sampled. 1,5 Reduction of on-farm Salmonella infection is important in order to decrease contamination of pork, the risk of salmonellosis for consumers, and losses from clinical disease. Methodology to improve the recovery of Salmonella spp. from pigs and their environments is needed to identify infected herds and to evaluate the effectiveness of Salmonella control programs. Delayed secondary enrichment is a procedure that has been shown to increase isolation of Salmonella spp. from bobwhite quail, chickens, chicken environments, and cattle feces.