Erysipelothrix rhusiopathiae

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Author:
ucstudent01
ID:
219232
Filename:
Erysipelothrix rhusiopathiae
Updated:
2013-05-12 13:40:28
Tags:
Erysipelothrix rhusiopathiae
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Description:
Erysipelothrix rhusiopathiae
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  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.

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