Investigation on contamination of common pathogenic bacteria in raw meat in Sichuan Province from 2017 to 2022
Objective To investigate the contamination levels of common pathogenic bacteria in raw meat in Sichuan Province,and to provide reference methods for food safety supervision.Methods A total of 1 763 raw meat samples of poultry and livestock were collected in Sichuan province from 2017 to 2022.Salmonella,Listeria monocytogenes,Campylobacter jejuni,Yersinia enterocolitica and Diarrheagenic Escherichia coli were detected according to the national standard method for food safety,x2 test or Fisher's test was used to compare the difference in rates,and the difference P＜0.05 was considered statistically significant.Results The detection rates of Salmonella,Listeria monocytogenes,Campylobacter jejuni,Yersinia enterocolitica and Diarrheogenic Escherichia coli were 26.65％,9.95％,7.66％,0.40％and 1.24％,respectively.The detection rates of Salmonella in raw poultry and animal meat were 27.40％and 24.11％,respectively.The detection rate of duck(36.00％)was higher(x2=11.711,P=0.008)than that of chicken(25.70％),and that of pork(30.77％)was higher(x2=8.746,P=0.026)than that of beef(13.75％).The detection rate of Listeria monocytogenes in mutton(30.77％)was higher(x2=13.611,P=0.002)than that in pork(5.59％),the detection rate in chilled meat(13.95％)and frozen meat(22.48％)was higher(x2=50.632,P＜0.001)than that in fresh meat(6.78％),and the detection rate in supermarket(17.00％)was higher(x2=16.723,P=0.004)than that in farmer's market(8.62％).The detection rate of Campylobacter jejuni in raw poultry meat(12.60％)was higher(x2=84.318,P＜0.001)than that in raw poultry meat(0.81％),and the detection rate of Campylobacter jejuni in raw poultry meat was stable(12.22％-13.53％).The detection rate of Campylobacter jejuni in fresh meat(9.46％)was higher(x2=30.667,P＜0.00)than that in chilled meat(0.76％)and frozen meat(0.85％).Conclusions The contamination of common pathogens in raw meat in Sichuan province is serious,and continuous monitoring and supervision should be strengthened.
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