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Investigation and analysis on the prevalence of Clonorchis sinensis infection in Guizhou Province in 2015
Received date: 2020-05-22
Revised date: 2020-08-22
Online published: 2021-03-10
To investigate the status of Clonorchis sinensis infection in Guizhou Province, a survey was carried out according to the National Survey Program for Human Key Parasitic Diseases. A total of 30 villages and 5 towns were selected as the survey sites from 16 counties (cities and districts) in the Province using the stratified cluster random sampling method, with no less than 250 people in each site being examined. The fecal samples were examined by the modified Kato-Kats method (two-slide reading/one sample). The eggs of C. sinensis and other important parasites in the fecal samples were examined and counted under microscopy. General information of the participants was collected. A total of 8 838 people were investigated, of them 37 were found with C. sinensis infection, showing a infection rate of 0.42% (37/8 838), and all of them had mild infection. The infection rate in males and females was 0.50% (22/4 375) and 0.34% (15/4 463), respectively. Thirty-six cases were distributed in the Qiandongnan prefecture, and one case in the Liupanshui City, with a significant regional difference (P < 0.01). The infection rate was 0.04% (3/7 572) among 7 572 people in rural areas, and 2.69% (34/1 266) among 1 266 people in urban areas, indicating a significant difference between them (P < 0.01). In the Qiandongnan prefecture, the infection rate in Rongjiang County (township) was 11.90% (30/252), which was significantly higher than that of Kaili City (urban area) (1.60%, 4/250) (P < 0.01). Only one out of 37 cases of C. sinensis infection also had Ascaris lumbricoides infection. The age group of 11-20 years had the highest infection rate (0.97%) among age groups, the education group of high school and college level had the highest infection rate (3.14%) among education groups, and the occupation group of workers and officials had the highest infection rate (2.36%) among occupation groups (P < 0.01). Qiandongnan prefecture is still the key epidemic area of C. sinensis infection in Guizhou Province. It is necessary to expand the survey sites in towns to further understand the prevalence of C. sinensis infection.
Key words： Guizhou Province; Clonorchis sinensis; Infection; Survey
An-mei LI , Yu-ting HUANG , Dan-cheng YAO , Ai-ya ZHU , Yang LI , Wei-fang SHI , Jia-rui DAI , Yan GENG , Dan-ya SHE , Nian-heng ZHANG . Investigation and analysis on the prevalence of Clonorchis sinensis infection in Guizhou Province in 2015[J]. CHINESE JOURNAL OF PARASITOLOGY AND PARASITIC DISEASES, 2021 , 39(1) : 125 -128 . DOI: 10.12140/j.issn.1000-7423.2021.01.019
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