PATHOGENS
- Streptococcus species: usually group A (S. pyogenes, for most cases)
- Other Streptococcus groups: B, C, G (especially group G)
- Staphylococcus aureus: MRSA now dominates both in and out of the hospital.
- Dog/cat bite: Pasteurella multocida, Capnocytophaga canimorsus
- Human bite: Eikenella corrodens, anaerobes, S. aureus
- Salt water exposure: Vibrio vulnificus
- Fresh or brackish water exposure: Aeromonas hydrophobia, Plesiomonas shigelloides
- Neutropenia: P. aeruginosa, other Gram negatives
- Occasional causes (see individual pathogen modules): S. pneumoniae, H. influenzae, Legionella spp., Erysipelothrix rhusiopathiae (meat/fish exposure), fungal.
- Immunosuppressed patients (mostly): Helicobacter cinaedi or other related species, coagulase-negative Staphylococci, Cryptococcus spp., Candida spp, Nocardia, nontubercular mycobacteria
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