医学寄生虫学钩虫。发达的口囊是其形态学特点。成虫寄生肠道引起钩虫病(hookwormdisease),主要表现为贫血及与贫血相关的症状(heavyinfectionmayevokeanemiaknownasYellowLaziness)在寄生人体消化道的线虫中,钩虫的危害性最为严重(world-widedistribution,about900millionsinfectionsintheworld)一、生物学分类及主要虫种ClassificationandSpecies线形动物门(PhylumNemathelminthes)线虫纲(ClassNematoda)圆线目(OrderStrongylata)钩口科(FamilyAncylostomatidae)(Ancylostomaduodenale,)美洲板口线虫(Necatoramericanus,),northAfrica,northernAsia(northChina),(southChina)Manyareasareendemicforbothspecies二、钩虫的形态Morphology形状:—呈“C”—呈“S”形大小:虫体细长,约1cm颜色:活体半透明,肉红色,:成虫头端顶端有一发达的口囊(alcapsule):雄虫末端形成交合伞(copulatorybursa),内有肌性辐肋,:1,2,:0,2,
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