Felis ISSN 2398-2950

Corynebacterium

Synonym(s): Corynebacterium equi, C. equi, Rhodococcus equi, R. equi

Contributor(s): Susan Dawson, David Scarff

Introduction

Classification

Taxonomy

  • Genus: Corynebacterium.
  • Genus: Rhodococcus, formerly Corynebacterium.
  • Species :equi.

Etymology

  • Gr: korune - club; bakterion - staff/cane/small rod.

Active Forms

This article is available in full to registered subscribers

Sign up now to purchase a 30 day trial, or Login

Clinical Effects

Epidemiology

Habitat

  • Corynebacterium spp in soil, feces and gastrointestinal tract of sheep, cattle, horses, etc.
  • Horses are the reservoir for R. equi, although it is also found in soil and other animals' feces.

Transmission

  • Probably opportunistic infection in cats.
  • May follow trauma, other infections or immunosuppression.

Pathological effects

  • Probably opportunistic infections.
  • Localized abscesses or cellulitis.
  • R. equi and some Corynebacterium spp are facultative intracellular parasites.
  • Survive in macrophages via suppression of phagolysosomal fusion and evoking a pyogranulomatous response.
  • Survival in macrophages and induction of pyogranulomatous response   →   formation of abscesses and granulomas.
  • Lesions consist of macrophages and giant cells, plus neutrophils in caseous areas.
  • Corynebacterium spp have been isolated from plaque-like lesions and discharging sinuses.
  • R. equi has been cultured from occasional cases with cutaneous abscesses and cellulitis, and from mediastinal and mesenteric granulomas in an immunocompetent cat.

Other Host Effects

  • Significant feline infections are probably rare.

Control

Control via animal

  • Surgical drainage of abscesses.

Control via chemotherapies

  • Antibiotic susceptibility testing recommended.

Rhodococcus equi

Corynebacterium spp

Control via environment

  • Protect wounds from contact with soil and farm animal excreta.

Vaccination

  • None.

Diagnosis

This article is available in full to registered subscribers

Sign up now to purchase a 30 day trial, or Login

Further Reading

Publications

Refereed papers

  • Recent references from VetMed Resource and PubMed.
  • Higgins R and Paradis M (1980) Abscess caused by Corynebacterium equi in a cat. Veterinary Record 21, 63-64.
  • Jang S S et al(1975) A cat with Corynebacterium equi lymphadenitis clinically simulating lymphosarcoma. Cornell Veterinarian 65, 232-239.
  • Elliot G, Lawson G H K and Mackenzie C P (1986 )Rhodococcus equi in cats. Veterinary Record 118, 693-694.

ADDED