Analysis of results of the fifth survey of intestinal nematode infections in Jinan

Objective To ascertain the prevalence of intestinal nematode infections in the City of Jinan in order to provide a scientific basis for the development of health education and parasite control measures and for eradication of those nematodes.Methods Fecal smears were tested for intestinal nematode eggs using the Kato-Katz technique and the cellophane tape technique was used to look for Enterobius vermicularis eggs.Hookworm species were differentiated using the Harada-Mori technique(filter paper test tube culture),and specimens were also checked for other nematode larvae.Results The overall rate of infection with intestinal nematodes was 31.22% in 1989,19.55%in 1996,2.40%in 1999,0.07% in 2002,and 0in 2011.The difference in the overall rate of infection was statistically significant(χ2=1828,P 0.01).The total rate of infection in 1999 decreased by 87.72% compared to that in 1996(χ2=282.88,P0.01).The total rate of infection in 2002 decreased by 97.5% compared to that in 1999.The rate of pinworm infection was 1.86%in 2011.In 1999,the rate of infection for men was 2.83% and that for women was 1.96%.There were no significant differences(χ2=1.58,P0.05)in the rate of intestinal nematode infection by gender in 1999.There were significant differences in the rate of infection for different age groups(χ2=92.83,P0.01).Conclusion The rate of intestinal nematode infection in Jinan has tended to decline.The rate of intestinal parasite infection is already low,so there is no need for large-scale use of pesticides.