OCCUPATION AND HEALTH ›› 2026, Vol. 42 ›› Issue (9): 1220-1224.

• Treatise • Previous Articles     Next Articles

Analysis of monitoring results of paragonimiasis endemic in Kaijiang County of Dazhou City from 2021 to 2023

HONG Yue1, WU Xiaohong2, YUAN Xiaoming3, PENG Huanwen1()   

  1. 1. Dazhou Center for Disease Control and Prevention,Dazhou,Sichuan 635002,China
    2. Sichuan Center for Disease Control and Prevention,Chengdu,Sichuan 610041,China
    3. Dazhou Kaijiang County Center for Disease Control and Prevention,Dazhou,Sichuan 636250,China
  • Received:2025-07-01 Revised:2025-07-28 Online:2026-05-01 Published:2026-05-22
  • Contact: PENG Huanwen,E-mail:huanwenpeng@163.com

Abstract:

Objective To understand the epidemiological dynamics of Paragonimus in Kaijiang County,grasp the influencing factors,and assess the prevention and control effects,so as to provide a basis for improving public health,formulating prevention and control measures and scientific research. Methods From 2021 to 2023,monitoring data of Paragonimus in Kaijiang County were collected,reviewing the historical monitoring data and relevant literature of Paragonimus in Kaijiang County from 2011 to 2023,and synthesizing the monitoring results to make a comparative analysis. Results A total of 1 208 people were surveyed in Kaijiang County from 2021 to 2023,and the total positive rate of human anti-Paragonimus antibody IgG was 2.07%(25/1 208),of which,the positive rate of residents' antibody was higher than that of students' antibody. From 2021 to 2023,a total of 621 freshwater crabs were captured and dissected,with a positive rate of 9.66%(60/621) for Paragonimus metacercaria infection,the average weight of 30.20 g of freshwater crabs,and the total infection level of 2.45 cysticerci/crab. Compared with 2011-2013,the positive rate of human anti-Paragonimus antibody IgG,the proportion of eating freshwater crabs,playing with crabs,and drinking raw water in the population decreased significantly;The knowledge rate of Paragonimus in the population increased significantly;And there was no statistically significant difference in cysticercosis infection of crabs. The results of univariate analysis showed that playing with crabs and drinking raw water were the risk factors for IgG-positive serum anti-Paragonimus antibodies in the population(χ2=6.511,12.922,both P<0.05). The division of monitoring sites in Kaijiang County from 2015 to 2023 was 7 level Ⅲ and 2 level Ⅳ Paragonimus infected sites. The top 3 townships with seropositivity rate of each monitoring site in Kaijiang County from 2015 to 2023 were Gantang Township,Yongxing Township,and Jiangzhi Township. There was a significant positive correlation between the positive rate of crabs and the altitude of the sampling site(r=0.904,P<0.05). Conclusion Kaijiang County is the epidemic foci of paragonimiasis,and the risk factors for population infection still exist,so it is necessary to further strengthen the publicity and education of knowledge of paragonimiasis prevention and control,and to change the bad hygienic and dietary behaviors of the local residents.

Key words: Paragonimus, Intermediate host, Predisposing factors, Surveillance results

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