这个词是什么意思？
A phylum of predominantly GRAM-POSITIVE BACTERIA that includes the orders Bacillales and EUBACTERIALES. BACILLOTA and BACTEROIDETES are the two bacterial phyla that constitute the majority of the human gut MICROBIOTA.
中文名称索引；定义为 MeSH 英文原文，尚未逐条译审。MESH:D000068536 · MeSH 2026。
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