Analysis of surveillance of food-borne pathogens in commercial food in Baiyin

Objective To know the pollution situation and distribution of common food-borne pathogens in commercial food in Baiyin City and to identify the variety of high-risk food and provide scientific basis for food safety evaluation.Methods Samples were collected from trade market, catering organizations, supermarket, retail store, and snack bar in monitoring sites. According to Handbook of Food-borne Pathogens Surveillance, the procedures and methods were followed to detect and isolate pathogens. Results Out of the 1 385 food samples, 110 strains of pathogens were detected from 18 kinds of food, with the total detection rate of 7.94%. The detection rate was 2.47%(32 strains) of Staphylococcus aureus,10.17%(61 strains) of Bacillus cereus, 1.07%(11 strains) of Listeria monocytogenes, 0.08%(1 strains) of Salmonella,22.73%(5 strains) of Pseudomonas aeruginosa. The detection rate was the highest in raw milk and milk powder, then in barreled drinking water, instant non fermented soy products, local flour and rice food, baby formula. No pathogens were detected in fruit and vegetable, urban mobility breakfast, aquatic product, frozen drinks, egg product, quick-frozen flour and rice food,fresh fruit juice and seasonal food. There was statistical difference in detection rate among different types of sampling sites(χ2=24.383, P0.05). There was no statistical difference in detection rate among different years(χ2=7.283, P0.05). Conclusions Contaminations of food-borne pathogens in commercial food are severe in Baiyin City. Effective control measures should be taken to strengthen food safety supervision and management in order to reduce the food poisoning and risk of diseases.