Specificity of Salmonella Typhimurium strain (ATCC 14028) growth responses to Salmonella serovar-generated spent media

Abstract

Salmonella enterica is one of the most prevalent pathogens responsible for foodborne illness worldwide. Numerous Salmonella serovars have been associated with the consumption of a variety of products, and limiting food-borne illness due to Salmonella serovars is a continuing problem for food producers and public health. The emergence and prevalence of Salmonella serovars has been studied but the predominant serovars have varied somewhat over the years. The aims of this research were to compare the aerobic growth responses of selected predominant foodborne Salmonella serovars, and evaluate how the spent media from different serovars affects the growth of a well-characterized Salmonella Typhimurium strain. Growth responses were similar for most strains in spent media except for S. Typhimurium (ATCC 14028), which exhibited a decrease in growth in the presence of Salmonella Heidelberg (ARI-14) spent media. This research will provide a better understanding of the growth differences among several Salmonella serovars in nutrient limited spent media.

Keywords:

• Spent media
• Salmonella Typhimurium
• growth response

Acknowledgments

We thank Dr. Steven Foley (National Center for Toxicological Research, 3900 NCTR Road, Jefferson, AR 72079, USA) for providing SH strains 114, 118, 130, 136, 144, 146, 163, 692, 824, 938, 945 and 1148, and Dr. W. Florian Fricke (University of Maryland School of Medicine, 655 W. Baltimore Street, Baltimore, MD 21201, USA) for providing SH strains SL 476 and SL 486.

Funding

We thank the National Integrated Food Safety Initiative (NIFSI) (2008–51110–04339), and the US Poultry & Egg Association for funding this research. We thank the University of Arkansas, Fayetteville, Department of Food Science (FDSC) program for supporting graduate student assistantships to authors J.R.C. and C.A.B., as well as the Michael Johnson Scholarship to C.A.B.