ISSN 2736-1756
Advanced Journal of Microbiology Research Vol. 2016
Available online at http://internationalscholarsjournals.org/journal/ajmr
© 2015 International Scholars Journals
Full Length Research Paper
Prevalence rate and antibiotic resistant pattern of methicillin-resistant Staphylococcus aureus and methicillin-resistant Staphylococcus epidermidis
Muhammad Arfat Yameen2, Hina Nasim2, Naeem Akhtar1, Saira Iram1, Imran Javed2 and Abdul Hameed2*
1Microbiology Department, Holy Family Hospital, Rawalpindi, Pakistan 46000, Pakistan.
2Microbiology Research Laboratory, Department of Microbiology, Quaid-i-Azam University, Islamabad, Pakistan 45320, Pakistan.
Accepted 17 December, 2015
Abstract
The aim of this study was to evaluate the prevalence rate and antibiotic resistant pattern of methicillin-resistant Staphylococcus aureus (MRSA) and methicillin-resistant Staphylococcus epidermidis (MRSE). A prospective study was conducted at Holy Family Hospital Rawalpindi, Pakistan and Microbiology Research Laboratory, Quaid-i-Azam University, Islamabad, Pakistan during the period from December 2007 to August 2008. The antibiotic resistance pattern was studied for MRSA and MRSE isolated from nasal samples from patients admitted in medical and surgical intensive care units. The study was conducted on 283 isolates. The results depicted that 25% isolates of S. aureus were MRSA and 29.78% isolates of S. epidermidis were MRSE. All MRSA and MRSE were susceptible to vancomycin and quinopristin/dalfopristin while all isolates of MRSE were susceptible to teicoplanin. All the isolates of MRSA and MRSE were multidrug-resistant. The susceptibility of the isolates to the drugs varied greatly. The resistance rate of MRSA to various antibiotics was found to be as follow: cephalaxin (90%), cephalothin (58%), cephradine (86%), ciprofloxacin (80%), gentamicin (34%), imipenum (42%), levofloxacin (75%), tetracycline (49%), rifampicin (14%) and teicoplanin (3%). The resistance rate of MRSE to various antibiotics was found to be as follow: cephalaxin (64%), cephalothin (29%), cephradine (64%), ciprofloxacin (50%), gentamicin (21%), imipenum (7%), levofloxacin (21%), tetracycline (21%) and rifampicin (29%). The minimum inhibitory concentration (MIC) value for MRSA and MRSE in case of vancomycin ranged 1-4 g/ml, for tetracycline 4-128 g/ml, for rifampicin 0.5-32 g/ml and for gentamicin 0.5 – 64 g/ml. Both MRSA and MRSE showed variable susceptibility with different antibiotic groups but high susceptibility with streptogramin and glycopeptide antibiotics.
Key words: Antibiotic resistance, staphylococcus aureus, staphylococcus epidermidis, minimum inhibitory concentration.