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- Aerobe or facultative anaerobe, thin, pleomorphic Gram-positive rod.
- Zoonotic infection that more commonly infects turkeys, pigs and other animals than humans.
- E. rhusiopathiae is only genus within species.
- Culture isolation difficult. Slow grower in enriched blood media with 5-10% CO2.
- Intrinsically resistant to vancomycin, which commonly might be used empirically unless the organism is properly identified and distinguished from diphtheroids (Corynebacterium spp.) and Lactobacillus.
- Also usually resistant to aminoglycosides and sulfonamides.