Abstract:

Objective To understand the contamination status of food with parasites in Shanghai market，so as to provide the evidence for formulating the surveillance strategy in parasitic diseases and provide the technical support in the food safety. Meth? ods The freshwater fish products，marine products，vegetables，snails and frogs were sampled with the cluster random method in the farmer ? trades and supermarkets of the 18 districts in Shanghai City during 2005-2010 period，and all the specimen were screened by the digestion method，or crushing method or dissection method or saline floatation method to check the parasite meta? cercaria or larvae or eggs. Results A total of 5 185 specimen in 23 species of fishes were screened in fresh?water products，with parasite infection rate of 1.93%. About 4 033 specimens of 20 species of fishes and shrimps were screened and 1.76% of samples were infected with Clonorchis sinensis. Among all kind of fishes，the highest infection rate was 7.83% （48/613） in Pseudorasbora parve. No any infected specimen was found among 1 152 specimen of fresh water crustacean screened. Anisakis spp. were found in 12.7% of 433 specimens of 23 species of seawater products，among them，the higher infection rate of Anisakis spp. was found in Pneumatophorus japonicas and Trichiurus haumela with their infection rates of 50.00%（13/26）and 23.46%（42/179），respective? ly，which much higher than those found in other seawater products（P < 0.01） . In 37 kinds of vegetables，the parasite eggs were found in one of 428 specimens with its infection rate of 0.47%，while no any parasite egg was found in 103 specimens of 10 kinds of fruits. No any Angiostrongylus cantonensis larvae were found in 330 snails，31.37% of 102 frogs were found infected with Spiro? metra mansoni spargana. No any contamination with parasites was found in 116 meat specimens of pigs and cattle. In the same time，the intestinal parasite infection rate of residents was 0.42% （131/31 239） . Conclusions It is found that some of foods in Shanghai markets are contaminated with parasites. Therefore，it is necessary to enforce the activities in health education as well as to take integrated prevention measures in order to ensure the food safety.

Key words: Food?borne parasites； Food in market； Sampling survey； Shanghai City

摘要：

目的 了解上海市市售食品中食源性寄生虫污染状况， 为制定寄生虫病监测策略、 保障食品安全提供依据。方法 采用分层整群随机抽样调查方法， 2005-2010年对上海市18个区 （县） 部分农贸市场和超市的淡水类水产品、 海水类水产品、 蔬果类、 肉类、 螺类和蛙类等样品， 分别采用消化法、 压片法、 剖检法和漂浮法检测寄生虫囊蚴、 幼虫和虫卵。结果 2005-2010年共检测淡水类水产品23种5 185尾， 寄生虫囊蚴感染率为1.93%。检测淡水鱼、 虾20种4 033尾， 华支睾吸虫囊蚴感染率为1.76%； 其中麦穗鱼感染率最高， 为7.83% （48/613）， 显著高于其他鱼种 （P < 0.01）。检测淡水甲壳类1 152 只， 未检出并殖吸虫囊蚴。检测海水产品23种433尾， 异尖线虫幼虫感染率为12.70%； 其中鲐鱼和带鱼异尖线虫幼虫感染率分别为50.00% （13/26） 和23.46% （42/179）， 显著高于其他海产品 （P < 0.01）。检测蔬菜37种428份， 寄生虫虫卵检出率为 0.47% （1/428）； 检测10种水果103份， 未检出寄生虫虫卵。检测螺类样品330份， 未检出广州管圆线虫幼虫。检测青蛙102 只， 曼氏迭宫绦虫裂头蚴感染率为31.37%。检测猪、 牛肉样品116份， 未检出寄生虫污染。 同期居民肠道寄生虫感染率为 0.42% （131/31 239）。 结论 上海市部分市售食品受到寄生虫污染。应加强食品卫生宣教工作， 采取有效的综合防治措施， 以确保提供安全的食品

关键词: 食源性寄生虫； 市售食品； 抽样调查； 上海市