这个词是什么意思？
A genus of gram-negative, facultatively anaerobic, rod-shaped bacteria whose organisms arrange singly, in pairs, or short chains. This genus is commonly found in the intestinal tract and is an opportunistic pathogen that can give rise to bacteremia, pneumonia, urinary tract and several other types of human infection.
中文名称索引；定义为 MeSH 英文原文，尚未逐条译审。MESH:D007709 · MeSH 2026。
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