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African Health Sciences
Makerere University Medical School
ISSN: 1680-6905
EISSN: 1729-0503
Vol. 17, No. 4, 2017, pp. 1000-1010
Bioline Code: hs17126
Full paper language: English
Document type: Study
Document available free of charge

African Health Sciences, Vol. 17, No. 4, 2017, pp. 1000-1010

 en Prevalence of mecA gene among staphylococci from clinical samples of a tertiary hospital in Benin City, Nigeria.
Ibadin, Ephraim Ehidiamen; Enabulele, Idahosa Onaiwu & Muinah, Fowora

Abstract

Background: The staphylococci have increasingly been associated with infections worldwide and anti-microbial resistance has made these versatile pathogens more recalcitrant in the hospital setting.
Objectives: This study sought to investigate the occurrence and distribution of Staphylococcus check for this species in other resources species as well as determine the prevalence of methicillin resistant Staphylococcus aureus check for this species in other resources (MRSA) and methicillin resistant coagulase negative staphylococci (MRCoNS) among clinical samples from University of Benin Teaching Hospital (UBTH) in Benin City.
Methods: Ninety one (91) clinical isolates comprising S. aureus and Coagulase Negative staphylococci (CoNS) were recovered from routine clinical specimens and anti-microbial susceptibility tests were carried out. Polymerase Chain Reaction (PCR) was thereafter carried out on these isolates to detect mecA gene.
Results: Staphylococcus species had its highest prevalence from infected wounds of patients (28.8%) while urine samples showed the least (5.4%). The highest level of resistance was to ceftazidime (S. aureus - 68%, CoNS - 75.6%) while the least resistance was observed for meropenem (S. aureus- 26%, CoNS- 46.3%). Using phenotypic method (with 1µg oxacillin antibiotic disc), the distribution of MRSA and MRCoNS was 44.0% and 46.3% respectively. PCR analysis showed that 38.0% of S. aureus and 41.5% of the CoNS had mecA gene respectively; wound swabs showed the highest prevalence with 30.5% of staphylococcal isolates being mecA gene positive. There was also no significant association between the Staphylococcal isolates and their isolation rate, isolation site and mecA gene distribution (p > 0.05).
Conclusion: This study draws attention on the increase in the prevalence of mecA gene (39.6%) and an increase in multidrug resistant staphylococci when compared to previous studies in our country; it recommends laboratory guidance and periodic review to stem the tide of resistance.

Keywords
Staphylococcus aureus (S. aureus); coagulase-negative staphylococci (CoNS); mecA gene; methicillin-resistance.

 
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