Analysis on the epidemiological situation of soil-transmitted nematodiasis at monitoring spots from 2006 to 2010

Abstract

Objective To understand the epidemiological situation,regularity and influencing factor of soil-transmitted nematodiasis nation wide,so as to provide the scientific evidence for making strategy and evaluating the effect of prevention of the diseases.Methods Three aspects of content were taken for monitoring in 22 national monitoring spots from 2006 to 2010,including situation of soil-transmitted nematode infection of people,contaminative situation of Ascaris eggs in soil and related natural and social factors.Then,data were collected for further statistical analysis on infection rate and infectiosity.Results The infection rate of soiltransmitted nematodes from 2006 to 2010 were 20.88％,18.93％,16.59％,13.30％ and 11.25％ respectively,which decreased by 46.12％ in 2010 compared to that in 2006(x2=1047.98,P＜0.01).The 5-10 years old children were characterized with high infection rate of 34.71％,29.22％,27.02％,21.19％ and 16.33％.Furthermore,the infection rate of Ascaris lumbricoides,Trichuris trichiura,hookworm and Enterobius vermicularis (examined only in children between 3 to 12 years old) were also decreased at different levels,by 53.93％,35.88％,45.83％ and 34.30％,respectively in 2010 compared to that in 2006.The detection rate of Ascaris eggs in soil was 37.10％,29.55％,25.93％,31.25％ and 24.42％ from 2006 to 2010,the difference showed no statistical significance (x2=10.43,P＞0.01).Conclusion It is showed that the infection rate of soil-transmitted nematodes was characterized with the tendency of declination from 2006 to 2010.The high epidemic areas still exist,while children and young adults remain in the high risk group of soil-transmitted nematode infection. Key words: Soil-transmitted nematode; Monitoring; Analysis