这个词是什么意思？
A genus of gram-negative, aerobic, spherical cells usually occurring in pairs. The resting stage is considered a cyst. (From Bergey's Manual of Determinative Bacteriology, 9th ed)
中文名称索引；定义为 MeSH 英文原文，尚未逐条译审。MESH:D020618 · MeSH 2026。
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