Abstract
INTRODUCTION: Otitis media is the inflammation of the middle ear cleft and the tympanum with otorrhoea lasting from 2 weeks to more than 3 months, with permanent perforation mainly caused by bacteria. MATERIAL AND METHOD: In this cross sectional bacteriological study of total 300 Chronic Suppurative Otitis Media cases from OPD & patients admitted in ENT ward of Tertiary Care Hospital, Rajkot were taken. Ear Discharge samples were collected and sent to department of microbiology as soon as possible. From January 2018 to June 2018, the Department of Microbiology was the site of the current study. OBSERVATIONS AND RESULTS: The study group's subject range in age from 1 year to 68 years. The prevalence of CSOM reduced with age. A total number of 6 bacterial species were isolated from 212 culture positive cases. The above table shows that the most common organism isolated was Pseudomonas aeruginosa 146 (68.9%) followed by Staphylococcus aureus 39 (18.4%), E. coli 12 (5.6%). Others include Klebsiella pneumonia 8(3.7%) each. Proteus mirabilis was isolated from 6 samples (2.8%) and, Providencia rotgeri in one sample (0.47%). Antibiotic sensitivity of Staphylococcus aureus was 97%, 10%, and 100% sensitive to aminoglycosides, flouroquinolones, and cephalosporins. Pseudomonas spp. was sensitive to aminoglycosides, flouroquinolones, and cephalosporins to varying degrees 65.41%, 48.29%, and 89.38%, respectively. CONCLUSION: The bacterial profile in ears that discharge changes with time. Every case of CSOM should occasionally be thoroughly analysed bacteriologically in order to avoid administering unnecessary antibiotics. This will undoubtedly assist in establishing dry ears, avoiding problems, and shortening the treatment period, lowering the patient's overall morbidity.

Key words: CSOM, ear discharge, antibiotics, bacteria