蛔虫鞭虫钩虫精品文档优质PPT.ppt
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蛔虫鞭虫钩虫精品文档优质PPT.ppt
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theposteriorendiscurvedventradThiswormisafemale,asevidencedbythesizeandgonopore(生殖孔生殖孔).AscanningelectronmicrographoftheanteriorendofAscarisshowingthethreeprominentlips.fertilizedegg-infective(受精卵受精卵受精卵受精卵)Fertilizedeggsareovaltoround,45-75mlongby35-50mwide,withathick,lumpyoutershell(mamillated,uterine,orproteinaceouslayer)thatiscontributedbytheuterinewall.Whentheeggsarepassedinthefeces,themamillatedlayerisbilestainedtoagoldenbrown.Crescent-shapedgapzygoteunfertilizedegg-notinfective(未受精卵未受精卵未受精卵未受精卵)Anunfertilizedfemaleoneinearlystagesofovipositioncommonlydepositsunfertilizedeggsthatarelongerandnarrower,measuring88to94mlongby44mwide.Adecorticatedfertilizedegg(脱蛋白质膜受精卵脱蛋白质膜受精卵脱蛋白质膜受精卵脱蛋白质膜受精卵)Itiscolorless受受受受精精精精卵卵卵卵未未未未受受受受精精精精卵卵卵卵蛋白质膜蛋白质膜蛋白质膜蛋白质膜卵壳卵壳卵壳卵壳卵细胞卵细胞卵细胞卵细胞新月形间隙新月形间隙新月形间隙新月形间隙卵黄颗粒卵黄颗粒卵黄颗粒卵黄颗粒二、二、二、二、lifecyclelifecycle(生活史生活史生活史生活史生活史生活史)成虫成虫(小肠)(小肠)(小肠)(小肠)卵卵随粪随粪随粪随粪入土入土入土入土潮湿、荫蔽、潮湿、荫蔽、潮湿、荫蔽、潮湿、荫蔽、OOOO2222充足充足充足充足、21-3021-3021-3021-30感染期卵感染期卵感染期卵感染期卵经口、孵出幼虫、体内移行经口、孵出幼虫、体内移行经口、孵出幼虫、体内移行经口、孵出幼虫、体内移行基本发育过程基本发育过程:
adultfertilizedegginfectiveegg(Adultwormsinhabitthelumenofthesmallintestine)eggsarepassedwithhostfeces.Thezygotewithintheeggshelldevelopsinmoistsoilatoptimaltemperatures(about25)andoxygenlevels.Afterbeingingestedbyahuman,eggscontaininginfectivelarvaehatchintheduodenumandreachtheparasitelocationafteracomplexmigratoryprocess.Developmentprocess:
侵入侵入侵入侵入肠粘膜肠粘膜肠粘膜肠粘膜的小的小的小的小VV、小、小、小、小LL右心右心右心右心门静脉门静脉门静脉门静脉肝肝肝肝肺肺肺肺肺泡肺泡肺泡肺泡(蜕皮(蜕皮(蜕皮(蜕皮22次)次)次)次)咽咽咽咽支气管支气管支气管支气管气管气管气管气管食管食管食管食管胃胃胃胃小肠小肠小肠小肠(蜕皮(蜕皮(蜕皮(蜕皮11次)次)次)次)Larvamigrationroute(幼虫移行途径幼虫移行途径幼虫移行途径幼虫移行途径):
):
Thelarvaeactivelyburrowintothemucosallining-theportalcirculationthelivertherightsideoftheheartthelungsthealveoli(moltingtwice)thebronchusthetracheatheepiglottis-theybecoughedup,swallowed,andpassedagaintothesmallintestine.viathecirculatorysystem,生活史的特点:
生活史的特点:
1.Parasiticlocation:
2.Infectivestage:
3.Infectionatrium:
smallintestinesmallintestinesmallintestinesmallintestineinfectiveegginfectiveegginfectiveegginfectiveeggMouthMouthMouthMouth(eating(eating(eating(eatingcontaminatedcontaminatedcontaminatedcontaminatedfoodorwater)foodorwater)foodorwater)foodorwater)4.Adultfemalecanproduce200,000eggsperday.三、三、三、三、signsandsymptomssignsandsymptoms录像录像录像录像11、幼虫致病、幼虫致病22、成虫致病、成虫致病蛔虫性哮喘蛔虫性哮喘、肺炎肺炎并发症并发症掠夺营养掠夺营养变态反应变态反应哮喘哮喘,荨麻疹荨麻疹并发症(国内报告国内报告8468例例)胆道蛔虫症胆道蛔虫症4556例例(53.8%)蛔虫性肠梗阻蛔虫性肠梗阻2337例例(27.6%)蛔虫性阑尾炎蛔虫性阑尾炎143例例蛔虫性胰腺炎蛔虫性胰腺炎17例例蛔虫性哮喘蛔虫性哮喘1352例例蛔虫性肝脓肿蛔虫性肝脓肿33例例AlargemassofAscarislumbricoidesliveintheintestinaltractandcancauseintestinalobstruction.directsmearmethod(粪便直接涂片法粪便直接涂片法粪便直接涂片法粪便直接涂片法)四、四、四、四、diagnosisdiagnosis(诊断(诊断(诊断(诊断(诊断(诊断)流行流行流行流行五、五、五、五、EndemityEndemityandPreventionandPrevention(流行与防治流行与防治流行与防治流行与防治流行与防治流行与防治)防治防治防治防治vvWhipwormvvOneofthemostcommonparasitesofhumansOneofthemostcommonparasitesofhumansvvDistributedthroughouttheworldinthesameDistributedthroughouttheworldinthesameareaswhereareaswhereascarisascarisandhookwormarefound.andhookwormarefound.Trichuristrichiura(毛首鞭形线虫毛首鞭形线虫毛首鞭形线虫毛首鞭形线虫)vTheanteriorportionofthebodyislongandslender,posteriorportionwidensandthickens,likebullwhipvFemaleislongerthanmale,35-50millimeter(mm).透明盖塞透明盖塞透明盖塞透明盖塞vEggsmeasure50to54mby22to23m.vtypicallybarrel-shaped(纺锤状),withtwoopercularplug(盖塞)Trichuristrichiuraegg成虫成虫(盲肠)(盲肠)(盲肠)(盲肠)卵卵随粪随粪随粪随粪入土入土入土入土潮湿、荫蔽、潮湿、荫蔽、潮湿、荫蔽、潮湿、荫蔽、OOOO2222充足充足充足充足、21-3021-3021-3021-30感染期卵感染期卵感染期卵感染期卵经口、孵出幼虫、经口、孵出幼虫、经口、孵出幼虫、经口、孵出幼虫、无体内移行无体内移行基本发育过程基本发育过程:
adultfertilizedegginfectiveegg(Adultsinhabitthecolonbutalsotheappendixandrectum.)eggsarepassedwithhostfeces.Thezygotewithintheeggshelldevelopsinmoistsoilatoptimaltemperatures(about25)andoxygenlevels.Humanbecomeinfectedwhentheseembryonatedeggsareingestedwithcontaminatedfoodorwaterorfromfingers.ThelarvaehatchintheupperportionsofthesmallintestineandquicklyburrowintothecellsoftheintestinalvillinearthecryptsofLieberkuhn,wheretheymature.Itdoesntneedmigratoryprocess.Developmentprocess:
(十二指肠钩口线虫)钩虫(美洲板口线虫)AncylostomaduodenaleNecatoramericanus(Hookworm)21DifferentialcharacteristicofA.duodenaleandN.americanussize:
A.duodenaleislargerthanN.americanus.Shape:
A.duodenalelikestheletter“C”N.americanuslikestheletter“S”ScanningelectronmicrographoftheoralopeningofAncylostomaduodenale.Notethepresenceoffourcuttingteeth,twooneachside.Necatoramericanus:
Theoralopeningofthisspeciescontainscuttingplates,noteeth.(十二指肠钩虫十二指肠钩虫:
两对钩齿两对钩齿)(美洲钩虫美洲钩虫:
一对板齿一对板齿)Buccalcapsule(口囊)Bursa&
dorsalrayLong,wideandrounded,dorsalraytripartiteBroaderthanlong,dorsalraysmall,bipartite与钩虫吸血有关的结构与钩虫吸血有关的结构口口囊内有钩齿或板囊内有钩齿或板齿齿.咽管壁肌肉发达咽管壁肌肉发达.虫体前端的腺体分泌一些酶,虫体前端的腺体分泌一些酶,抑制宿主的血液凝固抑制宿主的血液凝固.Hookwormegg:
nnmediumsizemediumsizennathineggshell,athineggshell,transparentnn2-4cellswithinegg2-4cellswithinegg(UncleavedUncleavedembryos)embryos)EggsofA.duodena
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