Analysis of soil-transmitted nematodes infection in populations in rural areas of Nanchang city during 2016-2022
Objective To understand the prevalence of soil-transmitted nematodes(STN)infection in the population in rural areas of Nanchang,and grasp the epidemic patterns.Methods The modified Kato-Katz thick smear method(two tests for one stool sample)was used to detect soil-derived nematodes in the stool of permanent residents aged 3 years old and above in rural areas of Nanchang city from 2016 to 2022.The species of hookworm with positive stool samples of hookworm eggs were identified by the test tube filter paper culture method;the infection rate and infection degree were calculated,and the Chi-square test was used for comparative analysis.Results From 2016 to 2022,the total infection rate of STN was 1.29％(280/21 783);the annual infection rates were 1.11％(46/4 157),1.40％(57/4 062),1.33％(55/4 126),1.13％(46/4 077),0.73％(13/1 773),2.39％(43/1 797)and 1.12％(20/1 791),respectively.The infection rate of each year had significant difference(x2=24.391,P＜0.01).88.93％(249/280)were mild infection.The infection rates of hookworm,Ascaris.lumbricoides and Trichuris trichiura were 0.98％(213/21 783),0.02％(5/21 783),0.30％(65/21 783),respectively.The infection rate of different species was significantly different(x2=244.053,P＜0.01).Mixed hookworm eggs and Trichuris trichiura eggs were found in 3 samples.The distribution characteristics of STN infection showed that there were significant differences in infection rates among different areas,sex,age groups and occupations(x2=223.950,39.614,98.125,52.739;all P＜0.01).The highest infection rates were 3.12％(168/5 379)in Anyi county,1.77％(191/10 789)in females,2.39％(92/3 850)in 60-＜70 years old age group and 1.61％(259/16 080)in farmers.Hookworm was the dominant species in this survey;hookworm infections accounted for 77.93％(166/213)in Anyi county.Ascaris lumbricoides and Trichuris trichiura were at a lower level of infection.Conclusions In rural areas of Nanchang,the infection rate of STN was maintained at a slightly high level.Hookworm was the dominant species,especially in Anyi county,where the infection rate of hookworm was relatively high;corresponding control measures should be taken.
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万方数据
