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- Frequency (based on 1779 cases 2000-03):
Culture negative [consider HACEK organisms, nutritionally deficient Streptococcus species (e.g., Abiotrophia), Coxiella burnetii (Q fever),
- Prosthetic valve:
- "Early" (< 60 days post-op): S. epidermidis (25%), S. aureus (20%), rest is a miscellany: enterococcus, Streptococcus sp, gram-neg bacilli, Candida sp, Diphtheroids, etc.
- Infection drug use:
- S. aureus, >> strep sp and mescellaneous other microbes