这个词是什么意思？
A genus of gram-positive, rod-shaped bacteria whose organisms are nonmotile. Filaments that may be present in certain species are either straight or wavy and may have swollen or clubbed heads.
中文名称索引；定义为 MeSH 英文原文，尚未逐条译审。MESH:D000190 · MeSH 2026。
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