[Investigation on food contamination with parasites in Shanghai market].

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.

Methods: 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 metacercaria 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.

[Potential risks for transmission of schistosomiasis caused by mobile population in Shanghai].

Objective: To understand the potential risk for schistosomiasis transmission caused by introduction of infection source from mobile population in Shanghai.

Methods: Field investigation was conducted in the suburb of Shanghai City by screening the mobile population living in Shanghai for more than 1 month and over 1 years old in a procedure of interviewing, serum indirect hemagglutination (IHA) test, and then fecal examination to detect the eggs with nylon sedimentation approach for those IHA positives.

Results: Among 2,931 mobile people investigated, 1,575 were male (53.

[Prevention and control of intestinal nematode infection in Shanghai].

Objective: To evaluate the current status of intestinal nematode infection in Shanghai and make recommendations for further control activities.

Methods: Retrospective review of the control program was made based on the change of nematode prevalence in Shanghai area since the 1950s, and challenges under the current situation were analysed.

Results: The intervention measures included chemotherapy, health education, sanitary disposal of human excreta and safe water supply.