Reliability of Enrichment and Selective Media for the Estimation of Salmonella typhimurium

Abstract

Selective media are normally used for the enumeration or the enrichment of salmonellae in foods. The advantages of enriching injured salmonellae in nonselective media is known. Results of this study indicate that in the nonselective cooked meat medium resuscitation can be achieved in 5-6 hours, before growth of salmonellae or other contaminating microorganisms has occurred. Thereafter, the salmonellae could be transferred to a selective enrichment medium. However, the reliability of the dehydrated selective enrichment media appeared to be further complicated by brand and lot differences.