Monitoring results of pathogens related to food safety risk in Changsha City,2020-2023
Objective To understand the contamination status of foodborne pathogens in commercially sold foods in Changsha City,and to provide a scientific basis for food safety risk assessment and early warning monitoring of foodborne diseases.Methods According to the requirements of the Manual for National Food Contamination and Hazardous Factors Risk Monitoring,we monitored and analyzed foodborne pathogens in 622 food samples across 11 categories in Changsha City from 2020 to 2023.Results Among the 622 food samples,346 strains of foodbome pathogens were detected,of which there were 37 strains of Burkholderia cepacia(49.33％),with only one strain carrying the bon gene,125 strains of Salmonella(24.65％),with 21 serotypes,predominantly Salmonella enteritidis,22 strains of Yersinia enterocolitica(10.68％),mainly characterized by ail-virF-yadA-ystA-rfbC-ystB+virulence genes,68 strains of Campylobacter(33.01％),32 strains of Cronobacter(26.67％),25 strains of Clostridium perfringens(13.59％),33 strains of Listeria monocytogenes(7.25％),3 strains of Bacillus cereus(3.75％)and 1 strain of Clostridium sordellii(2.86％).A total of 257 positive samples were identified,with an overall positivity rate of 41.31％.The positive detection rate in 2022 was the highest(66.67％),and that in 2023 was the lowest(24.21％).The positive detection rate indicated that raw poultry meat was the most contaminated(81.06％),followed by raw livestock meat(68.27％),spices and powders(62.50％),fresh tremella and wet Auricularia auricula(49.33％),and processed meat products(31.82％).Bulk samples had a higher positive detection rate(57.11％)compared with pre-packaged ones(12.67％).The positive detection rate was found to be the highest in farmers'markets(63.86％),followed by retail stores(35.14％),supermarkets(33.58％),and online stores(22.22％).Conclusion The contamination of foodborne pathogens in commercially sold foods in Changsha City is relatively severe.It is necessary to strengthen supervision and monitoring of high-risk food categories,enhance food safety monitoring and early warning systems,reduce the occurrence of foodborne diseases,and effectively safeguard public health.
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