The surveillance of intestinal parasitic infection in shanghai,2002-2009

Objective To understand the current status and trends of the intestinal parasitic infection in Shanghai population from 2002 to 2009,so as to provide scientific evidences for making prevention and control measures.Methods The intestinal parasites surveillance sites in 19 districts /counties of Shanghai were surveyed.Each stool specimens of residents were examined for parasitic infection by Kato-Katz,iodine direct smear,and adding test tube culture in suburb sites.Results All of 8 species parasites were found from 2002 to 2009.The overall infection rate of intestinal parasite was 0.52%(183 /35186),at an annual decline of 8.32 percent.The overall infection rates(0.79%)in 21 312 person from 10 districts /counties in suburb was significantly higher than the result(0.11%) in 13 874 person from 9 center districts(χ 2 =73.89,P 0.001),both infection rates were declined 30.39% and 88.0% from 2005-2009 to 2002-2004(χ 2 =4.68-13.93,P0.05,P0.001),respectively.Female infection rate(0.61%)was significantly higher than that of male(0.41%,χ 2 =6.43,P0.05).The highest infection rate was the age group above 60(0.66%-0.93%),and was in peasants(0.92%).But the infection rate was decreased with the increase in education level(χ 2 =53.36,P0.001).Conclusions The human infection rate of intestinal parasites was below 1% in Shanghai for seven consecutive years,revealing that intestinal parasitic infection are not important risk for people in Shanghai municipality in general.But it needs to enhance the surveillance in suburb,and the key population for the control is the old people,women and peasants.