Background: Ear infection is one of the most widespread illness usually caused by bacteria or viruses, and which can be extremely painful. They are the most common reason for parents to bring their children to clinicians. The aim of this study is to determine the prevalence and antibiotic susceptibility pattern of common bacterial ear pathogens isolated from patients in Tripoli, North Lebanon during the period of 7 years.
Methods:A total of 481 bacterial ear pathogens were isolated from deep ear swab specimens of patients who came to Nini hospital clinical laboratory in Tripoli, North Lebanon. Culture, identification and antibiotic susceptibility of suspected isolates were carried out through conventional tests. API identification and serotyping were performed according to standard protocols proposed by the Référentiel en Microbiologie Médicale and the recommendations of the European Committee on Antimicrobial Susceptibility Testing.Results: Out of 481, non-Enterobacteriaceae Gram negative rods were predominant (36.4%) followed by Staphylococcus aureus (24.8%), Enterobacteriace ae (16.8%), Haemophilus influenzae (10%), β-hemolytic streptococci (6.2%), Streptococcus pneumoniae (5.4%) and Moraxella catarrhalis (0.4%). Susceptibility testing showed the prevalence rate of methicillin-resistant S. aureus was 18.5% and of penicillin-non-susceptible pneumococci was 30.8%. Enterobacteriaceae and H. influenzae had susceptibilities of 18.5% and 80% to ampicillin, respectively. P. aeruginosa susceptibility to piperacillin-tazobactam and imipenem were very low, with 9.4% and 6.6%, respectively. Overall, H. influenzae and S. pyogenes isolates were also among the more susceptible isolates to antibiotics.