摘要
目的了解四川省消除血吸虫病进程中的传播风险,为全省制定血吸虫病防治策略提供科学依据。方法2021年春、秋季在四川省63个血吸虫病流行县(市、区)开展现场螺情、漂浮物、引种植物等钉螺相关因素调查及现场人群、野粪等传染源相关因素调查,计算四川省钉螺面积、钉螺扩散和血吸虫病人群病情、野粪等指标,并与往年资料比较,分析全省血吸虫病传播风险。结果2021年四川省实有钉螺面积7545.06万m^(2),未发现阳性钉螺;8个县(市、区)发现新发钉螺或复现钉螺面积,新发钉螺面积5.60万m^(2),复现钉螺面积7.34万m^(2);对重点地区开展钉螺LAMP试验,发现血吸虫阳性混合钉螺样本3份;四川省共打捞漂浮物4675.20 kg,发现钉螺66只,调查引种植物风险环境264处,发现钉螺114只,全部压检未发现阳性钉螺。2021年四川省未发现血吸虫病病人,血吸虫病抗体平均阳性率1.35%;10个县(市、区)的血阳率在1.72%~8.51%之间,远高于全省平均水平。结论四川省血吸虫病情、螺情指标回升,存在局部传播风险;在重点地区应加强传染源控制与钉螺控制并重的血吸虫病防治措施。
Objective To understand the risk of transmission in the process of eliminating schistosomiasis in Sichuan Province,and to provide scientific basis for formulating control strategies of schistosomiasis in the province.Methods In the spring and autumn in 2021,63 counties in Sichuan Province carried out field surveys on the relative factors of oncomelania snails such as snail area,snail carrying on floating matter,snail of introduction plant,and the relative factors of schistosomiasis infection sources such as field population and wild feces.The area of snails,the spread of snails,the condition of the schistosomiasis population and wild feces were calculated and compared with the data in previous years to analyze the risk of schistosomiasis transmission in the province.Results The area of snail was 75450600 m^(2)in Sichuan Province in 2021,and no positive snail was found.The new-discovery snail and rediscovery snail in 8 counties,and the area of snail were 56000 m^(2)and 73400 m^(2)respectively.Three samples of mixed snails were found by LAMP test in key areas.66 snails were found in 4675.2 kg of floating debris,and 114 snails were found in 264 risk environments of introduced plants in the whole province.No schistosomiasis patients were found in the whole province in 2021.The average positive rate of schistosomiasis antibody was 1.35%.The blood positive rate was 1.72%-8.51%in 10 key counties,which was much higher than the average level of the whole province.Conclusions The index of schistosomiasis and snail situation is increasing in Sichuan Province,and there is a risk of local transmission.The schistosomiasis control measures of both source of infection and snail should be strengthened in key areas.
作者
王楠楠
张宇
徐亮
尚婧晔
蒲晨
陈琳
刘阳
吴子松
WANG Nannan;ZHANG Yu;XU Liang;SHANG Jingye;PU Chen;CHEN Lin;LIU Yang;WU Zisong(Sichuan Center for Disease Control and Prevention,Chengdu 610041,Sichuan Province,China)
出处
《寄生虫病与感染性疾病》
CAS
2023年第3期167-171,共5页
Parasitoses and Infectious Diseases
关键词
血吸虫病
钉螺
传播风险
四川
schistosomiasis
oncomelania snail
risk of transmission
Sichuan
