《人体寄生虫学 Human parasitology》课程教学课件（讲稿）Lectures 4.Fasciolopsis buski

Fasciolopsis buskip154The largest intestinal fluke.which can cause Fasciolopsis

Fasciolopsis buski p154 The largest intestinal fluke, which can cause Fasciolopsis

MORPHOLOGYOral suckerVentral suckerAdult worm :20~75×8~20×0.5~3mmUterusElongated ovoidPinkish in colour when aliveOral sucker<ventralsuckertwo branched testesUterus is located between ovaryand acetabulumtestes

MORPHOLOGY Adult worm ： 20～75×8～20×0.5～3mm Elongated ovoid Pinkish in colour when alive. Oral sucker <ventral sucker. two branched testes Uterus is located between ovary and acetabulum

ADULT WORM

ADULT WORM

Adult worm成虫stained specimensmodel figure

Adult worm

EggOperculumSize:130~140um X80~85umEmbrvoniccellColor: Pale yellowishShell: Thin shellVitellinecellsA small operculum欢aaShellContains:One undeveloped embryonic cell20~40vitellinecells

Egg Size:130～140m ×80～85m Color: Pale yellowish Shell: Thin shell A small operculum Contains: One undeveloped embryonic cell 20~40 vitelline cells

X100.EnlargedX400.EnlargedFasciolopsis buski egg

Fasciolopsis buski egg ×400. Enlarged ×100. Enlarged

姜片虫卵

姜片虫卵

LIFE CYCLEAdult - Egg - Miracidium- Sporocyst - Redia (2CercariaMetacercariagenerations)(infective stage) - Juvenile(adolescent)- Adult

LIFE CYCLE Adult – Egg – Miracidium – Sporocyst – Redia (2 generations) – Cercaria – Metacercaria (infective stage) – Juvenile(adolescent)– Adult

Metacercariaeonwater4a4bplantingestedbyhumans40orpigs,causinginfectionRediaeCercariaeSporocystsFree-swimmingcercariaeinsnailtissueSnailExcystinduodenumMiracidia hatch.penetrate snailEmbryonatedeggsinwater=Infective StageAdultsinUnembroynatedeggsA-Diagnostic Stagesmall intestinepassedinfeces

LifecycleOrallyinfectionAdultHuman and pig IntestineCercaria→MetaceEnter Miracidium→Sporocyst 三RediaEggwaterrcaria-WaterplantsSnail

Life cycle Egg Miracidium Sporocyst Snail Orally infection Adult Human and pig Intestine Enter water Metace rcaria Redia Cercaria Water plants