资源描述：
《不同发育期福寿螺对广州管圆线虫易感性的实验研究》由会员上传分享，免费在线阅读，更多相关内容在学术论文-天天文库。
1、262中国寄生虫学与寄生虫病杂志2005年10月第23卷第5期ChinJParasitolParasitDisOct.2005,Vol.23,No.5文章编号:1000-7423(2005)-05-0262-04【论著】不同发育期福寿螺对广州管圆线虫易感性的实验研究刘和香111*112223,张仪,周晓农,吕山,朱丹,林金祥,李莉莎,李友松,殷位刚!!!【摘要】目的探讨和了解广州管圆线虫幼虫对不同发育期福寿螺感染的差异。方法将实验室饲养的子1代福寿螺按体重分为4个等级,分别为螺苗级、仔苗级、中螺级和成螺级。应用福建同一来源并经实验室传代的广州管圆线虫I
2、期幼虫分别感染4级螺,观察比较其感染率、感染死亡率、感染度、III期幼虫(感染期幼虫)大小和幼虫在螺体的发育速度及分布情况。结果4级螺均能被广州管圆线虫感染,其感染率在76%和100%之间,差异无显著性(P>0.05)。螺级越小感染死亡率越高。中螺级的感染度较高,体内超过100条幼虫的螺数也较多。螺级间螺体幼虫发育状态基本相似。各级螺中的III期幼虫大小及III期幼虫出现前期和盛期均无明显差异(P>0.05)。幼虫广泛分布于螺体各脏器与肌肉等处,但以肺与肌肉中居多。各级螺内III期幼虫均能成功感染大白鼠。结论不同发育期福寿螺对广州管圆线虫均易感而相容,
3、螺级间螺体幼虫发育状态基本相似。螺苗级和仔苗级福寿螺在传播广州管圆线虫病中的潜在危害应予进一步认识。【关键词】福寿螺;广州管圆线虫;III期幼虫;螺级中图分类号:R383.241文献标识码:AStudiesonSusceptibilityofPomaceacanaliculataofDifferentDevelopmentalStagestoInfectionwithAngiostrongyluscantonensisLIUHe-xiang,ZHANGYi,ZHOUXiao-nong,LVShan,ZHUDan,LINJin-qiang,LILi-sh
4、a,LIYou-song,YINWei-gang(NationalInstituteofParasiticDiseases,ChineseCenterforDiseaseControlandPrevention,Shanghai200025,China)【Abstract】ObjectiveTostudythesusceptibilityofPomaceacanaliculataofdifferentdevelopmentalstagestoAngiostrongyluscantonensisinfection.MethodsP.canaliculat
5、asnailsbreedingatlaboratoryweredividedintofourrank(Ⅰ-Ⅳ)accordingtotheweight,andinfectedwiththefirststagelarvaeofA.cantonensisfromFujianProvince.Theirmortality,infectionrate,wormburden,andthesize,developmentanddistributionoflarvaeinsnailswereexamined.ResultsSnailsatdifferentdevel
6、opmentalstageswerereadilyinfectedwithA.cantonensis.Theinfectionratewasbetween76%and100%,withnosignificantdifferenceamongthegroups(P>0.05).Snailsatearlierdevelopmentalstageshowedhighermortality.Theheaviestwormburdenandthelargestnumberofsnailsharboringmorethan100larvaewerefoundins
7、nailsofrankIII.Ingeneralthelarvaeinsnailsshowedasynchronousdevelopmentinthegroups.Sizesofthethirdstagelarvaeinsnailsofvariousrankswerehomogeneous.Theperiodbeforethethirdstagelarvaemergenceandthetimeforapeakpercentageofthelarvaeexhibitednosignificantdifferenceamongthefourranks.Th
8、elarvaewidelydistributedinvariouspartsofsnails,
