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1、262中國寄生蟲學(xué)與寄生蟲病雜志2005年10月第23卷第5期ChinJParasitolParasitDisOct.2005,Vol.23,No.5文章編號:1000-7423(2005)-05-0262-04【論著】不同發(fā)育期福壽螺對廣州管圓線蟲易感性的實驗研究劉和香111*112223,張儀,周曉農(nóng),呂山,朱丹,林金祥,李莉莎,李友松,殷位剛!!!【摘要】目的探討和了解廣州管圓線蟲幼蟲對不同發(fā)育期福壽螺感染的差異。方法將實驗室飼養(yǎng)的子1代福壽螺按體重分為4個等級,分別為螺苗級、仔苗級、中螺級和成螺級。應(yīng)用福建同一來源并經(jīng)實驗室傳代的廣州管圓線蟲I
2、期幼蟲分別感染4級螺,觀察比較其感染率、感染死亡率、感染度、III期幼蟲(感染期幼蟲)大小和幼蟲在螺體的發(fā)育速度及分布情況。結(jié)果4級螺均能被廣州管圓線蟲感染,其感染率在76%和100%之間,差異無顯著性(P>0.05)。螺級越小感染死亡率越高。中螺級的感染度較高,體內(nèi)超過100條幼蟲的螺數(shù)也較多。螺級間螺體幼蟲發(fā)育狀態(tài)基本相似。各級螺中的III期幼蟲大小及III期幼蟲出現(xiàn)前期和盛期均無明顯差異(P>0.05)。幼蟲廣泛分布于螺體各臟器與肌肉等處,但以肺與肌肉中居多。各級螺內(nèi)III期幼蟲均能成功感染大白鼠。結(jié)論不同發(fā)育期福壽螺對廣州管圓線蟲均易感而相容,
3、螺級間螺體幼蟲發(fā)育狀態(tài)基本相似。螺苗級和仔苗級福壽螺在傳播廣州管圓線蟲病中的潛在危害應(yīng)予進一步認識?！娟P(guān)鍵詞】福壽螺;廣州管圓線蟲;III期幼蟲;螺級中圖分類號:R383.241文獻標識碼: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,
