Objectives: Aims of this study wereto evaluate the aerobic microorganisms in CSOM and antibiotics sensitivity to them.
Methods: The study was a cross-sectional, prospective study conducted during the period from 1^st of November 2018 to 28^th of February 2019 at Al-Ramadi Teaching Hospital and Microbiological Department of College of Medicine, University of Anbar. Patients with aural discharge ≥ 12 weeks, eardrum perforation and deafness were enrolled in the study. Samples of ear discharge were collected and cultured. The identification of bacterial species was performed with antimicrobial susceptibility testing according to EUCAST.
Results: Out of 63 patients, 29 (46.0%) were males and 34 (54.0%) females. Most of patients with unilateral disease 76.2% (n= 48) and bilateral 23.8% (n=15). Three of the bilateral cases presented with unilateral active aural discharge, so the total number of ear discharge specimens was 75. Out of 75 specimens, 68 (88.3%) showed aerobic microorganisms, while 9 (11.7%) showed negative growth. Pseudomonas aeruginosa is the most common isolate constituting (35, 45.4%), each Staphylococcus aureus and Staphylococcus epidermidis were isolated in (13, 16.8%), and the least microorganism isolated was E. coli (1, 1.3%). Impenem is the most effective (97.1%) antibiotic against the isolated microorganisms, while 72.4% isolates were sensitive to amikacin and 71.4 % to ciprofloxacin.
Conclusion: Pseudomonas aeruginosa is the most common organism found in this study. Since the price of ciprofloxacin is cheap and the study has proven to be sensitive in approximately 3/4 of microorganisms in CSOM, so it can be used as empirical treatment in this disease