这个词是什么意思？
A species of parasitic protozoa that infects humans and most domestic mammals. Its oocysts measure five microns in diameter. These organisms exhibit alternating cycles of sexual and asexual reproduction.
中文名称索引；定义为 MeSH 英文原文，尚未逐条译审。MESH:D016785 · MeSH 2026。
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