江滩喷洒氯硝柳胺悬浮剂灭螺效果纵向观察  

Longitudinal study on molluscicidal effect of suspension concentrate of niclosamide in marshland

作　　者：吴荣凤 肖敏[1] 李春兰[1] 戴建荣[2] 

机构地区：[1]江苏省扬中市疾病预防控制中心,扬中212200 [2]江苏省血吸虫病防治研究所

出　　处：《中国血吸虫病防治杂志》2008年第4期285-287,共3页Chinese Journal of Schistosomiasis Control

基　　金：江苏省卫生厅项目(X200716)

摘　　要：目的评价氯硝柳胺悬浮剂（SCN）在江滩地区连续应用的灭螺效果,为江滩地区长期应用SCN灭螺提供依据。方法选择江苏省扬中市有螺江滩作为灭螺现场,每年按SCN总剂量6-8g/m2进行喷洒灭螺,并对螺情进行调查,考核连续4年应用SCN的灭螺效果。结果2004-2007年江滩灭螺前活螺平均密度分别为6.00、4.25、2.04只/0.1m^2和1.95只/0.1m^2;灭螺后活螺平均密度分别为0.86、0.86、0.23只/0.1m^2和0.16只/0.1m^2;灭螺后活螺密度逐年下降,2004-2007年活螺密度下降率分别为85.67%、79.76%、88.49%和91.78%。2007年灭螺后较2004年灭螺前活螺框出现率由73.46%降为9.66%,下降了86.85%;活螺平均密度由6.00只/0.1m^2降为0.16只/0.1m^2,下降了97.33%。结论经过连续4年使用SCN喷洒灭螺,钉螺密度显著下降,灭螺效果稳定可靠。SCN适用于江滩地区长期大规模灭螺。Objective To evaluate the long-term molluscicidal effect of suspension concentrate of niclosamide （SCN） spraying in marshland regions of the Yangtze River. Methods A marshland with Oncomelania snails in Yangzhong City, Jiangsu Province, was selected as the study spot, and a dose of 6--8 g/m^2 of SCN was sprayed yearly for four successive years, and the status of snails was investigated. Results From 2004 to 2007, the average densities of living snails were 6.00, 4. 25, 2.04, 1.95 snails/0. 1 m^2 , respectively before the use of molluscieide, and 0. 86, 0. 86, 0.23, 0. 16 snails/0.1 m^2 , respectively after that. The average densities of living snails before and after the use of molluscicide reduced year by year, and the reduction rates of average densities of living snails were 85.67%, 79.76%, 88. 49% and 91.78%, respectively from 2004 to 2007. The rate of frames with snails after the use of molluscicide was 73. 46% in 2007, with a reduction rate of 86.85% compared with 9.66% of that before the use of molluscicide in 2004, and the average density of living snails reduced from 6.00 snails/0. 1 m^2 to 0.16 snails/0. 1 m^2, with a reduction rate of 97. 33%. Conclusions After the spraying for four successive years, the density of snails reduces significantly and the molluscicidal effect is stable and reliable. SCN is a formulation of molluscicide for long-term application in marshland regions.

关 键 词：氯硝柳胺悬浮剂 钉螺 灭螺效果 江滩 纵向观察 

分 类 号：R383.24[医药卫生—医学寄生虫学]