| 吕媛,易尚辉,刘桃成,易银沙,汪耀珠.氯硝柳胺杀灭钉螺效果影响因素分析[J].Chinese journal of Epidemiology,2006,27(8):685-689 |
| 氯硝柳胺杀灭钉螺效果影响因素分析 |
| A study on the effect of Oncomelania hupensis hupensiss killed with niclosamide in China |
| Received:February 10, 2006 |
| DOI： |
| KeyWord: 氯硝柳胺 钉螺 实验流行病学 |
| English Key Word: Niclosamide Oncomelania hupensis hupensis Experiment epidemiology |
| FundProject:湖南省自然科学基金资助项目(05jj30067) |
| Author Name | Affiliation | E-mail | | LV Yuan | Department of Epidemiology, Medical College of Hunan Normal University, Changsha 410006, China | | | YI Shang-hui | Department of Epidemiology, Medical College of Hunan Normal University, Changsha 410006, China | | | LIU Tao-cheng | Department of Epidemiology, Medical College of Hunan Normal University, Changsha 410006, China | | | YI Yin-sha | Department of Epidemiology, Medical College of Hunan Normal University, Changsha 410006, China | ly598598@yahoo.com.cn | | WANG Yao-zhu | Department of Epidemiology, Medical College of Hunan Normal University, Changsha 410006, China | |
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| Abstract: |
| 目的研究氯硝柳胺杀灭钉螺的效果并了解影响其杀灭效果的主要因素。方法采用实验流行病学方法,对中国血吸虫病流行区的钉螺通过随机分层抽样,抽取了10个省(市)33个县共37个点,采集钉螺,随机分组,用不同浓度的氯硝柳胺分别浸泡24 h、48 h,观察其杀灭效果,计算不同药物浓度、不同作用时间和不同生境的LC50。统计分析采用SPSS 13.0软件进行。结果氯硝柳胺溶液1．0 mg／L浸泡24 h和0．5 mg／L浸泡48 h,杀螺率均达100％。同一作用时间,对钉螺的杀灭效果随着药物浓度降低显著下降,浸泡钉螺24 h,LC50均值为0．0939 mg／L,而浸泡钉螺48 h,LC50均值为0．0625 mg／L,浸泡24 h和48 h间的杀灭钉螺LC50差异有统计学意义(t=5．001,P<0．01)。在一定的浓度范围内,氯硝柳胺对钉螺的杀灭效果在48 h、不同生境(山丘型、湖沼型和水网型)Slg LC50之间的差异具有统计学意义(F=4．264,P<0．05)。非条件logistic回归分析,浓度、时间、生境的标准化回归系数估计值分别为2．047(OR=5．573)、0．263(OR=2．924)、0．187-0．210(1．969-2．560)。结论氯硝柳胺能有效杀灭钉螺,药物浓度、作用时间以及钉螺孳生地类型为其主要影响因素。 |
| English Abstract: |
| Objective To study the effect of Oncomeluniu hupensis hupensis of niclosamide, and exploring the main influencing factors.Methods The samples of Oncomelania hupensis hupensis were collected from 37 sampling sites in 33 counties of 10 provinces by means of stratified random sampling methods in accordance with the categories of Oncomelaniu hupensis hupensis habitats. Samples were randomly located into study group and control group. Oncomelania hupensis hupensi.s of the study group was marinated in different concentration liquor of niclosamide which was confected with water for 24 hours or 48 hours, then LCs0 of niclosamide by which Omonzelaniu hupensis hupensis was killed and amount calculated. The influencing factors of the mortality of Oncomelunia hupensis hupensis in the study group was statistically analyzed by丫test and by multiple logistic regression using SPSS 13.0 statistical software.Results The mortality of Onconzelunia hupensis hupensis of the two test groups which were marinated in 0.5 mg/L liquor for 48 hours and 1.0 mg/L liquor for 24 hours was 1000}.The effect of Oncomelania hupensis hupensis killed by niclosamide was markedly reduced along with the reduction of drug concentration. The average LCs0 rates of niclosamide liquor by which Oncomelania hupensis hupensis killed for the 24 hours and 48 hours in the study group, were 0.0939 mg/L and 0.0625 mg/L, respectively. There was significant difference between the two test groups (x2=5.001，P<0.O1).In determinate range of concentration, the mortality of Oncorrzelania hupensis hupensis showed significant difference among the geographic types of habitat(x2=4.264，P<0.OS).By means of multiple logistic regression using SPSS 13.0 statistical software, the estimate value of coefficient of regression on the influence factors, drug concentration, test time and the geographic types of habitat were 2.047(OR=5.573)，0.263(OR= 2.924) and 0.187- 0.210(OR=1.969-2.560)，respectively.Conclusion Niclosamide could kill Oncomelaniu hupensis hupensis effectively. The main influencing factors on the efficacy of niclosamide by which Oncomelania hupensis hupensis was killed, appeared to be drug concentration, time of testing and the geographic types of habitat. |
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