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February 2, 1979

Bacteriology of Chronic Otitis Media

Author Affiliations

From the Fairview State Hospital, Los Angeles (Dr Brook); Medical and Research Services, Veterans Administration Wadsworth Hospital Center, Los Angeles (Drs Brook and Finegold); and the University of California School of Medicine, Irvine and Los Angeles, Calif (Drs Brook and Finegold). Dr Brook is presently with the Department of Pediatrics, George Washington University School of Medicine, Washington, DC.

JAMA. 1979;241(5):487-488. doi:10.1001/jama.1979.03290310027008

Tympanocentesis was performed in 50 patients with chronic otitis media; pus was cultured aerobically and anaerobically. Only aerobes were isolated from 21 patients (42%), three patients had only anaerobes (Peptococcus sp), and 25 patients (50%) had both aerobes and anaerobes. Only one specimen had no growth. There were 68 aerobic isolates. Pseudomonas aeruginosa was recovered in 36 patients (72%); other aerobes commonly recovered included Proteus sp and Staphylococcus aureus. There were 48 anaerobes isolated. Anaerobic Gram-positive cocci were isolated in 24 instances (21 Peptococcus sp and three Peptostreptococcus sp). Sixteen Bacteroides sp were recovered, including seven B fragilis group and six B melaninogenicus.

(JAMA 241:487-488, 1979)