Guide to Diagnostic Tests
Otitis externa
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Organism
Otitis externa
Acute localized: S. aureus (15%) (GPC), anaerobes (32%), S. pyogenes (GPC in chains), H. influenzae , other gram-positive cocci.
“Swimmer’s ear”: Pseudomonas sp. (40%) (GNR), fungi (6%) (eg, Aspergillus sp., Candida sp.).
Chronic: Usually secondary to seborrhea or eczema.
Diabetes mellitus, AIDS (“malignant otitis externa”): P. aeruginosa (GNR), Aspergillus sp., Candida sp.
Furuncle of external canal: S. aureus.
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Organism
Otitis externa
Acute localized: S. aureus (15%) (GPC), anaerobes (32%), S. pyogenes (GPC in chains), H. influenzae , other gram-positive cocci.
“Swimmer’s ear”: Pseudomonas sp. (40%) (GNR), fungi (6%) (eg, Aspergillus sp., Candida sp.).
Chronic: Usually secondary to seborrhea or eczema.
Diabetes mellitus, AIDS (“malignant otitis externa”): P. aeruginosa (GNR), Aspergillus sp., Candida sp.
Furuncle of external canal: S. aureus.
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