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The current study was conducted to evaluate 5 bacteriologic culture methods (methods 1, 2, 3, 4, and 5) for recovery of Salmonella enterica from swine feces, both for sensitivity of detection (ability to recover Salmonella from a positive sample) and for specificity (not to inadvertently identify an organism as a Salmonella species in a negative sample). Fifty-six negative samples and 46 positive samples were processed using each of the 5 methods, which differed primarily in the combinations of enrichment media used. All negative samples were negative for Salmonella when cultured by all 5 methods (100% specificity). Two of the methods (methods 1 and 4) resulted in the recovery of significantly less (P &lt; 0.05) Salmonella when compared with the remaining 3 methods (methods 2, 3, and 5). No one method was successful in recovering Salmonella from all positive samples, although recovery with method 2 was statistically similar to the total number of positive samples analyzed (42 vs. 46 Salmonella-positive samples, P &gt; 0.05). This study shows that culture methods differ significantly in their performance regarding the isolation of Salmonella from swine fecal samples.

Comparison of Five Culture Methods for Salmonella Isolation from Swine Fecal Samples of Known Infection Status