Abstract:

Objective To investigate the schistosome infectivity of the water body of the Yangtze River and Hanbeihe River during flooding in Hubei Province. Methods The Oncomelania snail status was investigated in 17 sites of the Yangtze River and Hanbei River，and the infectivity of schistosome in sentinel mice was also determined. Results In the Yangtze River and Hanbei River，the average densities of living snails were 0.35 snails/0.1 m2 and 0.67 snails/0.1 m2 respectively，and the average infection rates of snails were 0.33% and 0.05%，respectively. The sentinel mouse surveillances were carried out twice in 10 sites of the Yangtze River. During the first surveillance the infection rate was 5.5% with 4 positive environment sites，and that was 5.5% with 7 positive environment sites in the second surveillance. The sentinel mouse surveillance was carried out once in 7 sites of the Han? beihe River，and the infection rate was 11.9% with 4 positive environment sites. Conclusions By monitoring schistosome infec? tion of the water body，we can understand the threat of environment and provide warning information to prevent from the outbreak and spread of acute schistosomiasis. We can also indirectly get many messages about the quality of snail investigation and the ef? fect of mollusciciding.

Key words: Schistosomiasis； Surveillance and forecast；Sentinel mice； Infectivity of water body； Hubei Province

摘要：

目的 了解汛期湖北省长江流域和汉北河流域血吸虫感染性。 方法 在长江流域湖北段和汉北河流域共设17 个监测点， 开展螺情调查， 并采用哨鼠测定法监测水体血吸虫感染性。 结果 长江流域湖北段和汉北河流域活螺平均密度分别为0.35只/0.1 m2 和0.67只/0.1 m2 ， 钉螺平均感染率分别为0.33%和0.05%。在长江流域共开展2次水体感染性监测，第1次哨鼠阳性率为5.5%， 有4处阳性环境； 第2次哨鼠阳性率为5.5%， 有7处阳性环境。在汉北河流域开展1次水体感染性监测， 哨鼠阳性率为11.9%， 有4处阳性环境。 结论 汛期湖北省长江流域和汉北河流域水体血吸虫感染性较高。采用哨鼠测定法监测重点水域血吸虫感染性可及时提供预警信息， 防止急性血吸虫病疫情发生和蔓延， 同时还可间接了解查灭螺工作质量和药物灭螺效果。

关键词: 血吸虫病； 监测预警； 哨鼠； 水体感染性； 湖北省