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Bacteriological study of paediatric and adult chronic suppurative otitis media.

Chronic suppurative otitis media (CSOM) is one of the commonest illnesses in ENT practice which requires medical attention all the more in children of poor socio-economic status having in past inadequate treatment and negligent medical care. The present study was conducted to find out the various aerobic and anaerobic microorganisms associated with CSOM in paediatric and adult cases and their current antimicrobial susceptibility pattern as a guide to therapy. Samples were collected from 109 clinically diagnosed cases of CSOM and processed according to standard protocols. Out of 74 paediatric CSOM cases, 72 (97.2%) were bacterial culture positive while out of 35 adult CSOM cases, 28 (80%) were culture positive. Bilateral CSOM was slightly more common in adults (25%) than paediatric (21.4%) age group. Polymicrobial nature of CSOM was noted in both paediatric (70.8%) and adult (71.4%) cases while number of organisms isolated per lesion was slightly higher in adults (2.5) as compared to paediatric (1.95) cases. In paediatric CSOM, Staphylococcus aureus was the commonest aerobic isolate while in adult CSOM, Pseudomonas aeruginosa was the commonest one. Among anaerobes Peptostreptococcus spp. was commonest in CSOM where as Prevotella melaninogenica in adult CSOM. Sensitivity of S. aureus to cefuroxime was 72.2% while that of gram negative bacilli was higher to cefotaxime (90 to 100%). Among anaerobes higher sensitivity was seen to metronidazole (98.6%), clindamycin (95.7%) and chloramphenicol (98.6%). In view of the polymicrobial etiology of CSOM, prompt appropriate antimicrobial therapy can effectively reverse the disease process thereby preventing longterm sequelae.

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