Effects of various chemical decontaminants on Salmonella Typhimurium survival in chicken carcasses

Abstract Salmonella Typhimurium is one of the most common foodborne pathogens isolated from poultry meat. The goal of this study was to investigate S. Typhimurium survival in broiler carcasses exposed to ozone, lactic acid, sodium hypochlorite and levulinic acid. S. Typhimurium was inoculated into broiler carcasses, which were divided into eight treatment groups, including a positive and negative control group. After standardized bacterial culture methods, microbiological analysis revealed a statistically significant relationship between the number of bacteria detected and the concentration and application time in all the treatment groups (p 0.05). Among the decontaminants, the most effective chemical solution was 3% LEV. The ozone treatment caused a lower logarithmic decrease in S. Typhimurium numbers at all treatment times as compared with that in the other treatment groups.摘要：鼠伤寒沙门氏菌（Salmonella Typhimurium）是从禽肉中分离得到的最常见食源性致病菌之一。本研究旨在探究经臭氧、乳酸、次氯酸钠以及乙酰丙酸（levulinic acid）处理的肉鸡胴体上鼠伤寒沙门氏菌的存活情况。实验中将鼠伤寒沙门氏菌人工接种至肉鸡胴体，随后将其分为8个处理组，包含阳性对照组与阴性对照组。采用标准化细菌培养方法开展微生物学分析后发现，所有处理组中检出的细菌数量与消毒剂浓度及作用时长均存在统计学显著相关性（p<0.05）。在所有消毒制剂中，效果最优的化学溶液为3% LEV（乙酰丙酸）。与其余处理组相比，臭氧处理在各作用时长下，对鼠伤寒沙门氏菌的对数杀灭降幅均更低。