Mice which have recovered from Babesia microti infection lose their parasitaemia as soon as three weeks after recovery and become solidly immune. This sterile immunity is not affected by splenectomy and may last for the life of the mouse. Mice which have recovered from B. hylomysci infection continue to harbour parasites at a subpatent level and spontaneous relapses were common after recovery. Hence the type of immunity which developed against this parasite is premunition and may last for life. Such immunity was not absolute and considerable parasitaemias developed after challenge. Cross-protection occurred between the two species of parasite.

译文

从巴氏杆菌微量感染中恢复过来的小鼠在恢复后三周之内就失去了寄生虫血症,并具有牢固的免疫力。这种无菌免疫不受脾切除术的影响,并且可以持续小鼠的一生。从hypoyysci感染中恢复的小鼠继续在亚专利水平上携带寄生虫,并且恢复后自发复发很常见。因此,针对这种寄生虫而产生的免疫力类型是弹药,可能会持续一生。这种免疫力不是绝对的,在攻击后会产生大量的寄生虫病。两种寄生虫之间发生交叉保护。

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