Surveillance results of soil-transmitted nematode in Dalian from 2016 to 2022
Objective To understand the prevalence of soil-transmitted nematode infection in Dalian to provide scientific basis for the formulation and control strategies.Methods One county was chosen as a surveillance site in Dalian from 2016 to 2022.One administrative village was randomly selected form each of five areas distributed geographically in the east,south,west,north and middle of the selected town.No less than 200 permanent residents were selected,resulting in 1 000 residents surveyed in each surveillance country.Fecal samples were examined by microscopically for STN eggs using the modified Kato-Katz thick smear method(two slide-reading per sample).The infection rate was compared by chi-square tests,and the test level was set as α=0.05.Results Totally,32 were infected with soil-transmitted nematodes in a total of 7 005 participants,with an overall infection rate of 0.46％.Only Ascaris lumbricoides and Trichuris trichiura were detected.No statistically significant difference of the infection rate was obeserved between males and females(x2=0.003,P=0.958),neither for different age groups(x2=13.638,P=0.092).The infection rate of individuals aged above 50 years was higher than that of individuals aged below 50 years(x2=7.958,P=0.005).Only farmers and workers infected;the infection rate of farmers was higher than that of workers,with statistically significant difference(x2=1.492,P=0.222).There were no significant differences of infection rate in different educational levels(x2=8.006,P=0.091),different districts(x2=6.058,P=0.195),and in Jinpu New District of different years(x2=4.333,P=0.228).Conclusions The communication control standard of soil-transmitted nematode has achieved in Dalian.Continuous monitoring and the training of soil-transmitted nematode microscopy technology should be strengthened.
万方数据
