Analysis on surveillance of soil-transmitted nematode infections in Beijing municipality, 2006-2010

Objective To understand the epidemiological situation of soil-transmitted nematode infections in Beijing during 2006-2010,and the awareness rate of villagers about the major parasitic diseases in 14 districts.Methods The residents at monitoring spot of Daxing District in Beijing were examined for Ascaris lumbricoides,Trichuris trichiura and hookworms with modified Kato-Katz thick smearone stool specimen-three slides from September to November from 2006 to 2010.Adhesive cellophane anal swab method was applied for examining the eggs of Enterobius vermicularis in children aged 3-12,other parasite species detected were registered as well.At the same time,soil samples of 10 household garden and surrounding were collected for microscopic examination on fertilized or unfertilized Ascaris eggs and identification of live and dead fertilized Ascaris eggs.A questionnaire survey about major parasitic diseases was carried out in 14 districts of Beijing,2010.One village was selected each district.Other districts in the city center were not included.Results A total of 5 172 persons was investigated during 5 years,including 356 children aged 3-12.Cases infected by soiltransmitted nematodes were not detected.A total 200 soil samples was collected and no Ascaris eggs was detected in the soil.A total of 283 villagers coming from 14 districts was investigated about relevant knowledge of major parasitic diseases control,their pass rate of prevention knowledge was 85.16％(241/283) and the pass rate of health behavior was 91.52％ (259/283).Conclusion The infection rate of soil-transmitted nematodes at monitoring spot of Beijing was low,the proportion that villagers take correct measures to prevent the parasite diseases was high,but the risk of infection still exists.It is necessary to continue monitoring and developing health education. Key words: Nematode infection;  Soil-transmitted nematode disease;  Monitoring spot;  Awareness rate