Wuchereria bancrofti Mosquito Stages Mosquito takes Human Stages a blood meal (L3 larvae enter skin Migrate to head and mosquito's proboscis ⑦L3avae Adults in lymphatics 6 L1 larvae Adults produce sheathed microfilariae that migrate ④Mosquito takes into lymph and blood a blood meal channels Microfilariae shed sheaths. (ingests microflarae】 pentrate mosquito's midgut. and migrate to thoracic muscles A=Infective Stage Diagnostic Stage 二、 生活史二、生活史