2017-2019年四川省仁寿县血吸虫病风险监测结果分析

目的了解仁寿县血吸虫病传播的风险因素,为制定防控策略措施提供依据。方法根据钉螺分布环境及重点风险区域,将钉螺、野粪、钉螺输入、漂浮物、哨鼠和野生动物作为监测对象,开展血吸虫病风险监测。结果钉螺监测调查34个环境,调查总面积为176410 m²,其中有螺面积为99340 m²,没有新发和复现面积;共调查2445框,系统抽样2094框,环境抽样351框,有螺框307框,有螺框出现率为12.56%,捕获钉螺537只,活螺494只,活螺密度为0.20只/框;未发现感染性钉螺。在调查钉螺的同时,在其周围环境发现5份野粪,经孵化检测5份野粪均未发现血吸虫毛蚴。在无螺乡镇或无螺环境引进有螺区植物的15个环境进行钉螺输入监测,共调查面积717000 m²,调查8101框,有其他螺306框,其他各种螺632只,钉螺0框,未发现钉螺。在全县15个与有螺水系相通和水流较缓的水域进行钉螺漂浮物监测,共打捞漂浮物394.24 kg,发现其他螺691只,未发现钉螺。2017年、2018年在风险监测高危水域中共投放哨鼠80只,回收并解剖57只,未发现阳性哨鼠,2019年未开展哨鼠监测。野生动物监测未捕获野鼠。结论仁寿县血吸虫病疫情处于较低流行态势,但仍然存在血吸虫病传播的风险因素,须继续加强风险监测,巩固防治成果。

Analysis of Surveillance Results of Schistosomiasis Risk in Renshou County of Sichuan Province From 2017 to 2019

Objective To understand the risk factors of transmission of schistosomiasis in Renshou county,and to provide the basis for formulating prevention and control strategies and measures,so that to improve the control effectiveness of schistosomiasis.Methods According to the environment of distribution and key risk areas of oncomelania,such as oncomelania,wild manure,oncomelania import,floating objects,sentinel mice and wild animals those were taken as monitoring objects to carry out the risk monitoring of schistosomiasis.Results About 34 environments were investigated for oncomelania monitoring,with a total area of 176410 m²,including 99340 m² of oncomelanias,there’s no new or recurrent area;Total of 2445 baskets were investigated,2094 baskets were used for systematically sampled,351 baskets were used for environmental sampled,among them,about 307 baskets were found oncomelanias,and the occurrence rate of it was 12.56%,about 537 oncomelanias were captured,494 of them were alive,and the density of live oncomelanias was 0.20 per baskets;no infectious oncomelania were found.During the investigation of Oncomelania hupensis,5 samples of wild feces were found in the surrounding environment,and no schistosome miracidia was found in 5 samples of wild feces after hatching.oncomelania imported monitoring was carried out in 15 environments of oncomelania free villages and towns or introduced plants from snail free areas.The total investigation area was 717000 m²,8101 boxes,306 boxes were found other kind of oncomelania,632 oncomelanias of all kinds and 0 boxes of oncomelanias.No oncomelania were found.A total of 394.24 kg of oncomelanias were salvaged in 15 water areas of the county which were connected with the oncomelanias water system and with slow flow.691 other oncomelanias were found,but no oncomelanias were found.In 2017 and 2018,a total of 80 sentinels were put into the high-risk water area for risk monitoring,and 57 were recovered and dissected.No positive sentinels were found,and no sentinel monitoring was carried out in 2019.Wild animal monitoring did not capture wild mice.Conclusion The epidemic situation of schistosomiasis in Renshou county is in a low epidemic situation,but there are still risk factors for the spread of schistosomiasis,so it is necessary to continue to strengthen risk monitoring and consolidate the control results.