Comparative analysis of monitoring results of soil-transmitted nematode in Tongjiang county of Sichuan province in 2015 and 2022
Objective To understand the prevalence and trend of soil-transmitted nematode in Tongjiang county of Sichuan province in 2015 and 2022,and provide scientific basis for formulating prevention and control measures.Methods The whole county was divided into five areas according to geographical position:east,west,south,north and middle.An administrative village was randomly selected in one township which was also randomly selected from each area,and no less than 200 permanent residents aged 3 years and above were selected as the monitoring objects in the village,with the stratified random cluster sampling method.Each fecal sample(≥30 g)was collected from one monitoring object,and one fecal sample was tested twice for counting nematode eggs with the improved Kato-Katz thick smear method,and tested the pinworm eggs in the children aged 3-9 years with transparent adhesive tape anal swab method.Results The prevalence of soil-transmitted nematode infections was 11.19％in 2015,and 2.03％in 2022 in Tongjiang county,with statistical difference(x2=70.138,P＜0.001).The infection rate of hookworm in 2022 was lower than that in 2015(x2=62.967,P＜0.001).The infection rate of ascaris lumbricoides in 2022 was lower than that in 2015(x2=4.612,P＜0.05).No trichuris trichiura infection was found in 2022,and no enterobius vermicularis infection was found in both years.The differences were statistical(P＜0.001)between the infections of 2 years in the male(x2=29.926),and in the female(x2=40.668).Most infected people were 60 years old and elder in both years.No infector found in the age group of 20-year in both years,and the infection rates of other age groups in 2022 was lower than that in 2015,with statistical differences in every age groups of 40-years and above(P＜0.05).Farmers were the main infectors,and the education level of all infectors were lower than junior high school.Conclusions The prevention and control of soil-transmitted nematode in Tongjiang county still needs to be strengthened in Tongjiang county.It is necessary to carry out health education,promote the project of water and toilet improvement,improve the living environment,and enhance the construction of professional prevention and control teams,so as to achieve the goal of effectively controlling the infection rate of soil-transmitted nematode.
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