这个词是什么意思？
A genus of gram-positive, coccoid bacteria whose organisms occur in pairs or chains. No endospores are produced. Many species exist as commensals or parasites on man or animals with some being highly pathogenic. A few species are saprophytes and occur in the natural environment.
中文名称索引；定义为 MeSH 英文原文，尚未逐条译审。MESH:D013291 · MeSH 2026。
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