Mississippi State University
Date of Degree
Graduate Thesis - Campus Access Only
Master of Science (M.S.)
College of Agriculture and Life Sciences
Department of Food Science, Nutrition and Health Promotion
This study determines the differences in survival of eight Salmonella strains concentration of BAC in water, followed by regrowth in high and low nutrition conditions containing sublethal concentration of BAC. Our results show strain difference in survival, persistence of Salmonella in BAC at different concentrations. All eight strains of Salmonella were non-recoverable when exposed to 40 to 48 µg/ml BAC for 1h in water. When exposed to 24 µg/ml of BAC for 1 h in water, S. Typhimurium ATCC 14028 and S. Heidelberg ATCC 8326 cells were non-detectable from the initial 7 log CFU/ml. S. Blockley 7175, S. Virchow 7207, S. Poona 01A4242 and S. Poona 00A3208, were non-detectable after 1 h exposure at 24 µg/ml and continued to be non-detectable in 12 µg/ml BAC in both nutrient conditions after 24 h. 3/8 strains formed rugose morphotypes when exposed to BAC thus leading to understanding the role of strain differences.
Food Safety Initiative Award by the Mississippi Agricultural and Forestry Exp. Station (MAFES) under projects MIS-401210
Umutesi, Grace, "Survival, regrowth and morphotype formation of Salmonella strains after exposure to high or low concentrations of first generation QAC in water" (2022). Theses and Dissertations. 5643.