RISK: The " autoinfection" cycle during this helminthiasis explains why the infection can be perpetuated without further exposure to exogenous, infective larvae.
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The water fleas are killed in the stomach but the infective larvae are liberated.
水蚤在胃里被杀死，但是感染性幼虫被解放出来。
The extraction of infective larvae of Ascaris lumbricoides can induce apoptosis of human alveolar epithelia in vitro.
人蛔虫感染期幼虫提取物能够诱导人肺上皮细胞的凋亡。
Clean and high density infective larvae could be obtained after centrifugation by sucrose cushion with the larvae isolated with above methods.
结论以上方法分离的感染性幼虫再经蔗糖垫层离心提取后，可得到纯净、高密度的活性虫体。
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