Isolation and antibiogram of some bacterial isolates from patients with ear infection in a tertiary health care facility at Benin City, Edo State, Nigeria

Abstract

Ear infection has been reported as a common health concern globally, impacting individuals across diverse demographic factors. Causative bacterial agents of this infection are constantly changing and require continuous surveillance to monitor emerging trends. This study investigated the bacterial etiologic agents and their susceptibility patterns among patients with ear infection at the study Centre. A total of 43 patients who visited the Ear, Nose and Throat clinic of the University of Benin Teaching Hospital that were diagnosed with ear infection were evaluated. Patient data and specimen were collected after which isolated bacteria were subjected to antimicrobial susceptibility testing against some antibiotics (Sparfloxacin, Azythromycin Amoxicillin-clavulanic acid and amoxicillin) using standard methods. Results obtained showed that patients aged 16-25 years were more predisposed to ear infection and substantial number of them (60.5%) reported previous history of the infection. Staphylococcus (48.70%) and Pseudomonas (26.30%) were the most predominant bacterial isolated from these patients. Other isolates included; Bacillus (14.5%), Corynebacterium (3.90%), Enterobacterium (1.30%), and Klebsiella (3.9%). Antibiogram revealed that 78.9% of the isolates were susceptible to the killing effects of Azithromycin and only 39.3% were susceptible to amoxicillin. However. 69.8% of isolates were susceptible to amoxicillin- clavulanic acid combination therapy. Conclusively, Staphylococcus and Pseudomonas, were the leading cause of ear infection at the study center. Azithromycin as well as amoxicillin- clavulanic acid combination were the most effective antibiotics against the encountered bacterial isolates and these antibiotics can be used as a first line drug in the management of ear infection at the study.