Cellulitis

Cellulitis is a topic covered in the Guide to Diagnostic Tests.

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Organism

Cellulitis

Spontaneous, traumatic wound: Polymicrobial: S. aureus (GPC), groups A, C, and G streptococci (GPC), enterococci (GPC), Enterobacteriaceae (GNR), Clostridium perfringens (GPR), Clostridium tetani, Pseudomonas sp. (GNR) (if water exposure).

Postoperative wound (not GI or GU): S. aureus, group A streptococcus, Enterobacteriaceae, Pseudomonas sp.

Postoperative wound (GI or GU): Must add Bacteroides sp., anaerobes, enterococcus (GPC), groups B or C streptococci.

Diabetes mellitus: Polymicrobial: S. pyogenes , enterococcus, S. aureus, Enterobacteriaceae, anaerobes.

Bullous lesions, sea water contaminated abrasion, after raw seafood consumption: Vibrio vulnificus (GNR).

Vein graft donor site: Beta-hemolytic streptococci.

Decubitus ulcers: Polymicrobial: S. aureus, anaerobic streptococci, Enterobacteriaceae, Pseudomonas sp., Bacteroides sp., other anaerobes.

Necrotizing fasciitis, type 1: streptococcus, anaerobes, Enterobacteriaceae; type 2: Group A streptococcus (hemolytic streptococcal gangrene).

Immunocompromised including HIV-infected individuals: Helicobacter cinaedi cellulitis-associated with bacteremia.

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