Microbiologic findings in patients with chronic suppurative otitis media

Abstract

The aim of this study was to determine the microbiology of CSOM in patients diagnosed with chronic otitis media referred to Otorhinolaryngology Clinic Samples for culture were taken from 50 patients with CSOM. The samples were cultured on enriched differential and selective media and kept in both aerobic and anaerobic conditions. Conventional biochemical tests were then performed on isolated colonies. Drug susceptibility testing was done according to standard protocol. Forty one (82%) of the middle ear cultures were positive. The most common isolated aerobe was Staphylococcus aureus (32.4%) followed by Pseudomonas aeruginosa (21.6%). In the anaerobic group (12%), the peptococcus species was most prevalent. The most effective antibiotic in the aerobic isolates was ofloxacin. According to the results of drug susceptibility test, 95.5% of strains including all the S. aureus isolates were sensitive to ofloxacin. The present study was one of the extensive reports on both aerobic and anaerobic bacteria in CSOM. Knowledge of the pathogens, responsible for CSOM and choose suitable antibiotics according to susceptibility tests should guide the management of disease treatment and reduces intracranial and extra cranial complications with CSOM.