Abstract:Objective To investigate the contamination situation of food-borne pathogens among edible raw aquatic products sold in Yantai City, to analyze their probability distribution features so as to provide a basis for dietary risk assessment and supervision of food-borne pathogens in edible raw aquatic products in Yantai City. Methods Totally, 282 samples were randomly sampled from 7 categories of edible raw aquatic products in some restaurants and supermarkets in 5 districts of Yantai City from April to December each year during 2010-2014. Vibrio parahaemolyticus, Staphylococcus aureus, Salmonella, Listeria monocytogenes and Escherichia coli O157 H7 were detected based on the relevant provisions of National Food Safety Standard GB 4789. The @Risk5.5 software was employed for data fitting. Results The edible raw aquatic products sold in Yantai City during 2010-2014 were contaminated by Vibrio parahaemolyticus and Listeria monocytogenes, with the overall contamination rates of 20.57% and 1.77% respectively. 7 categories of edible raw aquatic products, including gastropods, echinoderms, shellfishes, crustaceans, fishes, cephalopods and others were contaminated by Vibrio parahaemolyticus, with the contamination rates of 38.89%, 25.00%, 23.65%, 20.00%, 16.67%, 6.67% and 5.00% respectively, and the contamination rates were not significantly different among various categories (χ2=11.45,P=0.075). The @Risk fitting showed that the overall probability distribution of Vibrio parahaemolyticus was RiskNormal, the probability distribution of echinoderms, cephalopods, Chinese penis fish and jellyfish was RiskBetaGeneral and that of shellfishes, gastropods, crustaceans and fishes was RiskExtvalue, RiskUniform, RiskLogistic and RiskTriang espectively. The samples collected from April to December were all contaminated by Vibrio parahaemolyticus. The samples collected from July to September had the highest contamination rate (33.02%), which was significantly higher than those of the samples collected from April to June (16.09%) and from October to December (10.11%, χ2=17.08, P=0.00020). The probability distribution of Vibrio parahaemolyticus contamination data from April to June and from October to December was RiskTriang, while that from July to September was RiskExpon. No statistically significant difference was found in the contamination rate of Vibrio parahaemolyticus in the products from supermarkets and from restaurants (22.58% vs. 19.58%, χ2=0.34, P=0.56). The contamination rate of Vibrio parahaemolyticus was higher in the samples from small-to-medium-sized restaurants (42.86%) than in those from medium-sized (21.05%) and large (16.39%) restaurants, with statistically significant differences (χ2=21.28, P=0.000092), and their probability distribution of contamination data was different. Conclusions The edible raw aquatic products sold in Yantai City in 2010-2014 are mainly contaminated by Vibrio parahaemolyticus, and the probability distribution of contamination data presents diversified characteristics. Strengthening the process management through tracing sources, storage and transportation, and processing, as well as by constructing and implementing HACCP management system are conducive to ensuring the quality of edible raw aquatic products.
宫春波, 王朝霞, 董峰光. 2010-2014年烟台市即食生食动物性水产品中食源性致病菌污染状况调查[J]. 实用预防医学, 2016, 23(12): 1440-1443.
GONG Chun-bo, WANG Zhao-xia, DONG Feng-guang. Contamination status of food-borne pathogens in edible raw aquatic products in Yantai City, 2010-2014. , 2016, 23(12): 1440-1443.