安徽省休宁县2019－2021年并殖吸虫中间宿主监测结果分析

doi:10.11853/j.issn.1003.8280.2023.05.006

摘要/Abstract

摘要： 目的了解安徽省休宁县并殖吸虫中间宿主感染情况,为并殖吸虫病防治措施的制定提供依据。方法2019－2021年分别在休宁县休宁河、横江及率水河水系3个乡镇的9个行政村捕获小型淡水螺和溪蟹,形态学鉴定后,分别检测淡水螺体内并殖吸虫尾蚴和溪蟹体内囊蚴感染情况。计算溪蟹囊蚴感染指数,明确并殖吸虫病疫源地等级。应用EpiData 3.1和SPSS 23.0软件,对监测数据进行统计分析。结果共采集到2种小型淡水螺,经形态学鉴定为拟沼螺和放逸短沟蜷,检测拟沼螺3 826只,未发现并殖吸虫尾蚴。检测放逸短沟蜷10 440只,总感染率为0.89%（93/10 440）,其中儒村感染率最高,为2.25%（23/1 021）,岩角村感染率最低,为0.54%（4/743）,各调查点间感染率的差异有统计学意义（χ²=24.784,P=0.002）。溪蟹经形态学鉴定为长江华溪蟹,总感染率为21.41%（106/495）,儒村感染率最高,为32.89%（25/76）,岩角村感染率最低,为5.88%（3/51）,各调查点感染率的差异有统计学意义（χ²=16.225,P=0.039）。儒村、南塘村和江潭村囊蚴感染指数分别为0.12、0.02和0.03,为并殖吸虫病Ⅲ级疫源地。结论安徽省休宁县并殖吸虫中间宿主感染率较高,应加强并殖吸虫病防治知识的宣传,防止并殖吸虫病的流行。

关键词: 并殖吸虫, 中间宿主, 监测

Abstract: Objective To investigate the status of Paragonimus infection in intermediate hosts in Xiuning County, Anhui Province, China, so as to provide scientific evidence for formulating paragonimiasis control strategies.Methods From 2019 to 2021, small freshwater snails and crabs were captured in nine administrative villages in three towns along Xiuning river, Heng river, and Shuaishui river in Xiuning County. The freshwater snails and crabs were morphologically identified, and then were examined for Paragonimus cercariae and metacercariae, respectively. The metacercaria infection index of crabs was calculated to determine the levels of paragonimiasis epidemic foci. EpiData 3.1 and SPSS 23.0 were used for statistical analysis.Results Two kinds of small freshwater snails were collected, which were morphologically identified as Assiminea sp. and Semisulcospira libertina. Among a total of 3 826 Assiminea snails, no Paragonimus cercariae were detected. Among a total of 10 440 S. libertina snails, the overall infection rate was 0.89% (93/10 440); the infection rate was highest in Ru village (23/1 021, 2.25%) and lowest in Yanjiao village (4/743, 0.54%), with a statistical difference in the infection rate between the surveyed points (χ²=24.784, P=0.002). The crabs were identified as Sinopotamon yangtsekiense, and the overall infection rate was 21.41% (106/495). The infection rate of the crabs was highest in Ru village (25/76, 32.89%) and lowest in Yanjiao village (3/51, 5.88%), with a statistical difference between the surveyed points (χ²=16.225, P=0.039). The metacercaria infection index results of Ru village, Nantang village, and Jiangtan village were 0.12, 0.02, and 0.03, respectively, all being level-Ⅲ epidemic foci of paragonimiasis.Conclusions The intermediate hosts of Paragonimus in Xiuning County had a relatively high infection rate. Public health education on paragonimiasis should be strengthened to prevent the epidemic of paragonimiasis in this area.

Key words: Paragonimus, Intermediate host, Surveillance

中图分类号:

刘道华, 金郁, 李启扬, 杨荣笙, 汪天平, 操治国. 安徽省休宁县2019－2021年并殖吸虫中间宿主监测结果分析[J]. 中国媒介生物学及控制杂志, 2023, 34(5): 617-621.

LIU Dao-hua, JIN Yu, LI Qi-yang, YANG Rong-sheng, WANG Tian-ping, CAO Zhi-guo. An analysis of surveillance results of intermediate hosts of Paragonimus in Xiuning County, Anhui Province, China, 2019-2021[J]. Chinese Journal of Vector Biology and Control, 2023, 34(5): 617-621.

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