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

摘要

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). As compared with the control group, all the treatments were effective in terms of inactivation of S. Typhimurium. There was a significant decrease in the 1.5 ppm ozone treatment group (5 min and 15 min) as compared with that in the other chemical decontaminant groups (p 0.05). However, there was no significant difference in reduction of S. Typhimurium among the other treatment groups, irrespective of the treatment time (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.