Analysis on detection results of pathogenic bacteria in market-sold food in Pudong New Area of Shanghai from 2020 to 2022
Objective To understand the contamination status of pathogenic bacteria in market-sold food in Pudong New Area of Shanghai,and provide scientific basis for strengthening food safety supervision and formulating prevention and control strategies for food poisoning and foodborne diseases.Methods From 2020 to 2022,six major categories of commercially available food were collected monthly in Pudong New Area for testing of common pathogenic bacteria,and compare the detection and typing results of pathogenic bacteria in different types and times of food.Results Pathogenic bacteria were detected in 672 of 3 081 food samples,and the detection rate was 21.81％.A total of 5 pathogenic bacteria were detected,in which the detection rate of Vibrio parahaemolyticus was the highest(9.06％),followed by Listeria monocytogenes(7.34％)and Salmonella(5.00％),the detection rates of different types of pathogenic bacteria showed statistical significance(x2=993.795,P＜0.05).The detection rate of pathogenic bacteria in poultry and livestock food(34.32％)was significantly higher than that in aquatic products(20.85％)and other types of food,no pathogenic bacteria were detected in dairy products,and there was a statistically significant difference in the detection rate of pathogenic bacteria among different types of food(x2=240.230,P＜0.05).The detection rates of poultry and livestock food from 2020 to 2022 were 24.87％,19.54％,and 22.22％,respectively,and there was a statistically significant difference in the detection rates of pathogenic bacteria among different years(x2=9.390,P＜0.05).Comparison of detection rates between different seasons showed statistically significant differences(x2=12.983,P＜0.05),with the highest detection rate in summer(28.02％).The top three serotypes of Salmonella were S.enterica,S.typhimurium and S.derby.Conclusion There is a high proportion of pathogenic bacteria contamination in commercial food in Pudong New Area of Shanghai.The supervision and management should be strengthened in order to take targeted measures to prevent and control the occurrence and prevalence of food poisoning and foodborne diseases.
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