Epidemiology and Antibiogram of Clinical Staphylococcus aureus Isolates from Tertiary Care Hospitals in Dhaka, Bangladesh

Background: This study aimed to investigate the epidemiology and antibiogram of clinical Staphylococcus aureus isolates from three tertiary care hospitals in Dhaka, Bangladesh. Methods: A total of ۱۸۵ clinical S. aureus isolates were studied from March ۲۰۱۶ to February ۲۰۱۷ and identified by standard microbiological methods, and an antibiogram was determined by disc diffusion method. A duplex polymerase chain reaction (PCR) assay was performed on all isolates to detect femA and mecA genes of S. aureus. Results: Among the ۱۸۵ isolates, all (۱۰۰%) were positive for the femA gene, ۷۶ (۴۱.۱%) were methicillinresistant S. aureus (MRSA), and ۱۰۹ (۵۸.۹%) were methicillin-susceptible S. aureus (MSSA). The highest and the lowest frequency of both MRSA were isolated from pus and urine specimens, respectively. All ۱۸۵ S. aureus were ۱۰۰% sensitive to both vancomycin and linezolid and were highly sensitive towards rifampicin (۹۴%), meropenem (۸۷%), gentamicin (۸۵.۴%), and cotrimoxazole (۸۲.۲%), whereas the highest resistance was against penicillin G (۹۴.۶%) followed by amoxicillin/clavulanic acid (۸۲.۷%), azithromycin (۷۲.۴%), amoxicillin (۶۶.۵%), and ciprofloxacin (۶۳.۲%). After vancomycin and linezolid, MRSA showed good susceptibility to rifampicin, cotrimoxazole, and gentamicin, while MSSA exhibited high sensitivity toward rifampicin, gentamicin, cefoxitin, meropenem, cloxacillin, ceftriaxone, and cotrimoxazole. Furthermore, MRSA was significantly more resistant to antibiotics than MSSA (P value < ۰.۰۵), and the majority of S. aureus (۸۱.۱%), MRSA (۹۷.۴%), and MSSA (۶۹.۷%) were multidrug-resistant (MDR). Conclusion: Our findings can guide physicians to provide effective antibiotic therapy, implement monitoring and control strategies to reduce antimicrobial resistance, and prevent the dissemination of MRSA and MDR in the environment.

کلیدواژه ها:

Staphylococcus aureus ، mecA gene ، Methicillin-resistant Staphylococcus aureus ، Methicillin sensitive Staphylococcus aureus ، Antibiogram ، Multidrug resistant