Chin J Schisto Control ›› 2011, Vol. 23 ›› Issue (4): 381-385.

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Survey of causes of infected Oncomelania snails and infection sources of schistosomiasis in marshland and lake region in Jingzhou City

He Liang-cai1|Wang Jia-song1*|Rong Xian-bing1|He Zheng-wen2|Liao Chang-jun3|Huang Wen-jun2|Wang Dong-fang3|Yuan Mei-zhi1|Peng Xiao-wu1|Zhao Yao-sheng1   

  1. 1 Institute of Schistosomiasis Prevention and Control, Jingzhou City Center for Disease Control and Prevention, Hubei Province, Jingzhou 434000, China|2 Institute of Schistosomiasis Prevention and Control, Gong’an County, Hubei Province, China|3 Institute of Schistosomiasis Prevention and Control, Jianli County, Hubei Province, China
  • Online:2011-08-15 Published:2011-08-05
  • Contact: Wang Jia-song

荆州市湖沼地区感染性钉螺成因及血吸虫病传染源调查

何亮才1|王加松1*|荣先兵1|贺正文2|廖昌军3|黄文军2|万东方3|袁梅枝1|彭孝武1|赵耀升1   

  1. 1湖北省荆州市疾病预防控制中心血吸虫病预防控制所(荆州434000);2湖北省公安县血吸虫病预防控制所;3湖北省监利县血吸虫病预防控制所
  • 通讯作者: 王加松
  • 作者简介:何亮才|男|副主任医师。研究方向:血吸虫病预防控制
  • 基金资助:

    中国疾病预防控制中心委托项目(2010-36-W-063)

Abstract:

Objective To explore the causes of infected Oncomelania snails and the sources of infection of schistosomiasis in marshland and lake regions in Jingzhou City, so as to provide the evidence for the establishment of control strategy. Methods The snail environments in villages with or without cattle in Gong’an and Jianli counties, Hubei Province were selected, the snail status, infection status of people and livestock and wildlife reservoir host (mice), as well as the contamination status of wild faeces were surveyed, and the infectivity of water in investigated villages without cattle were detected by sentinel mice. The correlation between the densities of infected snails and positive faeces were tested by the rank correlation method. Results In villages without cattle, there were no positive faeces and infected sentinel mice discovered, while in the villages with cattle, 374 pieces of wild faeces were collected, the densities of wild faeces were 0.02-0.29 pieces/100 m2, and those of the positive ones were 0-0.01 pieces/100 m2, and the densities of infected snails were 0.001-0.040 snails /0.1 m2. The distribution of infected snails was consistent with that of the positive faeces, but the correlation coefficient between their densities had no statistical significance(rs=0.1235,P>0.05). The average infection rates of human in villages with cattle inside embankment of Gong’an and Jianli counties were 2.87% and 1.37%, respectively, while that of the villages outside embankment of Gong’an County was 1.23%, and all the infection rates of cattle were 0. No infected wild mice were discovered. Conclusions Human and cattle are the main sources of schistosome infection in the local areas, the possibility of wild mice as source of infection is low, and cattle is an important cause of infected snails in marshland and lake regions in Jingzhou City.

Key words: Infected Oncomelania snail, Source of infection, Survey, Marshland and lake region, Jingzhou City

摘要:

目的 探讨荆州市湖沼地区无牛村和有牛村血吸虫病传染源与感染性钉螺形成的原因,为制定湖沼地区血吸虫病防治策略提供科学依据。方法 选择湖北省公安县和监利县无牛村和有牛村有螺环境,对螺情、人畜病情、野生动物保虫宿主(鼠)感染情况、野粪污染情况等开展调查;对无牛村采用哨鼠法测定水体血吸虫感染性;采用秩相关分析对感染性钉螺与阳性野粪密度进行相关分析。结果 无牛村4处环境未发现阳性野粪,哨鼠疫水测定未发现感染性;有牛村12处感染性螺点累计收集野粪374份,野粪平均密度为0.02~0.29份/100 m2,阳性野粪平均密度为0~0.01份/100 m2,感染性钉螺密度为0.001~0.04只/0.1 m2,感染性钉螺与阳性野粪的分布地点一致,其密度相关系数无统计学意义(rs=0.123 5,P>0.05)。公安县和监利县垸内有牛村人群平均感染率分别为2.87%和1.37%,公安县垸外人群平均感染率为1.23%,未发现病牛。野鼠调查未发现血吸虫感染。结论 耕牛和病人是当地血吸虫病主要传染源,野鼠成为主要传染源的可能性较小;有牛村耕牛仍为荆州市湖沼地区感染性钉螺形成的一个重要原因。

关键词: 感染性钉螺, 传染源, 调查, 湖沼地区, 荆州市

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