Analysis of the soil-transmitted nematode infection in Tianjin from 2007 to 2010

Objective To analyze the result of soil-transmitted nematode infection surveillance in Tianjin during 2007-2010.Methods 2 villages in country side were chosen and human stool samples and soil samples were collected.Soil-transmitted nematode eggs of roundworm,hookworm,whipworm were examined by improved Kato-Kate thick smear method.The pinworm infections of children under 12 were examined by anus wiping method with transparent tape.The infection rates of them were then calculated.2 primary schools in downtown were chosen.The roundworm eggs were examined and its infection rate was calculated.Results A total of 9327 people had fecal examination in rural areas during 2007-2010.The yearly infection rates of roundworm were 5.12％,2.84％,0 and 1.83％ respectively.No other worms were found.The positive rate of roundworm egg in soil sample was 0.37％,0.26％,0,0.32％.5016 students were examined in downtown,and the yearly infection rates were 0.23％,0.40％,0.08％,0.74％.Conclusion The soil-transmitted nematode infection rate was low in Tianjin.But the source of infection is still available.Working on the disease control should be kept. Key words: Nematode infection; Soil-transmitted nematode; Infection rate; Disease control