这个词是什么意思？
A genus of bacteria in the family PISCIRICKETTSIACEAE that is an intracellular rickettsial-like pathogen of FISHES, especially species in the family SALMONIDAE.
中文名称索引；定义为 MeSH 英文原文，尚未逐条译审。MESH:D053522 · MeSH 2026。
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