Plesiomonas

Plesiomonas is a topic covered in the Johns Hopkins ABX Guide.

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MICROBIOLOGY

  • P. shigelloides is a facultative, anaerobic, Gram-negative rod weakly related to the species of Enterobacteriaceae and Vibrionaceae.
    • Previously known as Aeromonas shigelloides
    • Distinguish from Shigella spp. by oxidase test; distinguished from Aeromonas by negative DNAse testing.
    • Non-lactose fermenting, oxidase positive
  • Ubiquitous environmentally, it can be isolated from soil, usually fresh water, fish, shellfish and a wide range of animal species.
  • Mechanism of diarrhea due to Plesiomonas shigelloides is unknown. It is capable of producing a cholera-like enterotoxin, thermostable enterotoxin, and also a thermolabile enterotoxin.
  • Many isolates produce beta-lactamases.
    • Usually susceptible to fluoroquinolones and carbapenems.

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MICROBIOLOGY

  • P. shigelloides is a facultative, anaerobic, Gram-negative rod weakly related to the species of Enterobacteriaceae and Vibrionaceae.
    • Previously known as Aeromonas shigelloides
    • Distinguish from Shigella spp. by oxidase test; distinguished from Aeromonas by negative DNAse testing.
    • Non-lactose fermenting, oxidase positive
  • Ubiquitous environmentally, it can be isolated from soil, usually fresh water, fish, shellfish and a wide range of animal species.
  • Mechanism of diarrhea due to Plesiomonas shigelloides is unknown. It is capable of producing a cholera-like enterotoxin, thermostable enterotoxin, and also a thermolabile enterotoxin.
  • Many isolates produce beta-lactamases.
    • Usually susceptible to fluoroquinolones and carbapenems.

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