Erysipelothrix rhusiopathiae

  1. Diagnosis
    • Sample from: Skin lesion
    • SBA: Smooth, small, convex, circular, transparent
    •        Rough, large, matte, alpha hemolytic (greenish zones of incomplete hemolysis)
    • Gram Stain: small GPB may have filament
  2. Biochemical Tests
    • Negative:
    • Catalase, Motility, Esculin
    • Positive:
    • H2S in TSI
    •         This is the ONLY aerobic, catalase neg, non spore forming GPB that does this.
  3. What species is this related to?
    Listeria spp
  4. Epidemiology
    Colonizes variety of animals: fish & birds, but most particularly PIGS. Those at greatest risk are those that handle these animals.

    Causes: Erysipeloid in a cutaneous infection
  5. Gram Stain
    • Small GPB 
    • Occur singly, in short chains, or filaments
  6. Media
    • Wide temp range on complex nutrient media like SBA
    • Aerobic or Facultative anaerobic with 5 -10%O2
    • BAP:
    • Smooth small, convex(dome type), circular, & transparent.
    • or
    • Rough Large, matte, alpha hemolytic.
  7. Treatment
    Penicillin is drug of choice

    Aminoglycosides, sulfa and vancomycin are NOT effective.
Author
Kwalke12
ID
219232
Card Set
Erysipelothrix rhusiopathiae
Description
Erysipelothrix rhusiopathiae
Updated