《病原生物学》课程PPT教学课件（寄生虫学）蠕形住肠线虫（蛲虫）Enterobius vermicularis

蠕形住肠线虫 (虫)Enterobiusvermicularis

蠕形住肠线虫 (蛲虫) Enterobius vermicularis

一、形态1、成虫：A、虫体细小（早10.5一0.4，含3.5一1.5mm)乳白色，线头状B、头端有头翼C、有食道球（咽管球）D、早尾端尖细（占体长的1/3），含尾端卷曲2、虫卵：一侧扁平，一侧凸起，比蛔虫卵小无色透明，壳较厚，内含一卷曲的幼虫

一、形态 1、成虫： A、虫体细小（♀10.5—0.4 ，♂3.5—1.5mm) 乳白色，线头状 B、头端有头翼 C、有食道球（咽管球） D、♀ 尾端尖细（占体长的1/3），♂ 尾端卷曲 2、虫卵：一侧扁平，一侧凸起，比蛔虫卵小， 无色透明，壳较厚，内含一卷曲的幼虫

雌虫乳白色，虫体细小，雄虫肉眼仅能看到，尾部向腹面卷曲。雌虫成虫[adult)较大，尾部尖直而透明，细长似针

E

male adult.Carmine stained..2- 5 mm. in length witha strong ventrallycurved tail.·Anterior end showingcervical alae.·Rhabditiformesophagus

•Carmine stained. •2- 5 mm. in length with a strong ventrally curved tail. •Anterior end showing cervical alae. •Rhabditiform esophagus. male adult

cervical alaeAnterior end of female adultcervical alae

Anterior end of female adult cervical alae cervical alae

透明胶纸方法检查的虫卵虫卵【egg]无色透明，窄长形，一侧平另侧稍凸出，卵壳由二层壳质组成卵内含有一条幼虫

eggof Enterobiusvermicularis:size50-60umby20-32um;elongated ovoid shape,with one convex sideand oneflattened side;colorless shell;containsan embryo,orcoiled larvae

egg of Enterobius vermicularis: size 50-60 µm by 20-32 µm; elongated ovoid shape, with one convex side and one flattened side; colorless shell; contains an embryo, or coiled larvae

AEmbryonatedeggsingestedbyhuman2一生活史arvaehatchinsmall intestineAEggs on perianal foldsAdults in lumenLarvaeinsidetheeggsofcecummaturewithin 4to6hours.InfectiveStageGravidmigrates5=Diagnostic Stageto perianal regionat night to lay eggs

二生活史