Investigation on the contamination of Listeria monocytogenes in food in a city of Henan province from 2018 to 2022
Objective To understand the contamination status of Listeria monocytogenes in food and provide scientific basis for food safety monitoring and foodborne disease prevention and control.Methods From 2018 to 2022,a total of 310 food samples from 9 categories were collected in a certain city and tested in accordance with the national food safety standard GB 4789.30-2016.Statistical analysis was conducted using SPSS 22.0 software.Results The overall detection rate of Listeria monocytogenes in the 310 food samples was 9.3％.The detection rate was relatively high in 2022(22.9％),and the difference in food detection rates among different years was statistically significant(x2=66.266,P＜0.05).The detection rates among the food samples of three major categories,including fresh meat,catering food,and animal-based aquatic products,were 28.0％,10.2％,and 6.7％,respectively,with statistically significant differences(x2=46.117,P＜0.05).It was not detected among the food samples of the other 6 categories.The detection rate among unpacked food samples(12.1％)was higher than that among pre-packaged food samples(2.3％),and the difference was not statistically significant(x2=0.000,P＞0.05);The detection rates in the samples from different circulation links including convenience stores,agricultural markets,online stores,and catering stores were 13.0％,6.9％,4.3％,and 3.2％,respectively,and the differences were not statistically significant(x2=5.196,P＞0.05).Conclusions There is a high risk of contamination of Listeria monocytogenes in unpacked foods such as fresh meat,catering products,and animal-based aquatic products.Relevant departments should strengthen food safety supervision and monitoring in a targeted manner and increase relevant science popularization and publicity.
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