THE following is an outline of a method of obtaining large numbers of the larvæ of nematodes parasitic in sheep in media the composition of which can be much more accurately controlled than any ...

为探究巴西利什曼原虫（Leishmania (Viannia) braziliensis）Thor 株及 Thor03、Thor10、Thor22 亚群感染性差异原因，研究人员分析其前鞭毛体和无鞭毛体表面膜蛋白酶活性。结果显示各株系蛋白酶活性有差异，金属蛋白酶活性最高。这有助于理解寄生虫感染机制。 在神秘的 ...

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