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Ruminococcus gnavus bacteraemia showing morphological diversity on Gram staining: a case report and literature review

  • Tatsuya Hioki
  • , Kensuke Kataoka
  • , Yoshikazu Mutoh

Research output: Contribution to journalArticlepeer-review

Abstract

Ruminococcus gnavus, a Gram-positive anaerobic coccus, is a common constituent of the human gut microbiota but rarely causes any disease in humans. Herein, we report a case of R. gnavus bacteraemia in an immunocompromised 73-year-old man with sigmoid colon perforation. R. gnavus is usually reported as Gram-positive diplococci or short chains on Gram staining; however, in our patient, a blood isolate showed Gram-positive cocci in long chains, and organisms from an anaerobic subculture showed morphological diversity. This case provides insight into the morphological diversity of R. gnavus, which might help with the recognition of these bacteria in the preliminary identification stage on Gram staining.

Original languageEnglish
Article number000442
JournalAccess Microbiology
Volume5
Issue number6
DOIs
Publication statusPublished - 2023
Externally publishedYes

UN SDGs

This output contributes to the following UN Sustainable Development Goals (SDGs)

  1. SDG 3 - Good Health and Well-being
    SDG 3 Good Health and Well-being

Keywords

  • bacteraemia
  • Gram staining
  • matrix-assisted laser desorption/ionization time-of-flight mass spectrometry
  • Ruminococcus gnavus

ASJC Scopus subject areas

  • Microbiology
  • Microbiology (medical)

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