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2017 ; 17
(1
): 83
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English Wikipedia
In vitro transfer of methicillin resistance determinants mecA from methicillin
resistant Staphylococcus aureus (MRSA) to methicillin susceptible Staphylococcus
aureus (MSSA)
#MMPMID28376716
Bitrus AA
; Zunita Z
; Bejo SK
; Othman S
; Nadzir NA
BMC Microbiol
2017[Apr]; 17
(1
): 83
PMID28376716
show ga
BACKGROUND: Staphylococcus aureus more than any other human pathogen is a better
model for the study of the adaptive evolution of bacterial resistance to
antibiotics, as it has demonstrated a remarkable ability in its response to new
antibiotics. This study was designed to investigate the in vitro transfer of mecA
gene from methicillin resistant S. aureus to methicillin susceptible S. aureus.
RESULT: The recipient transconjugants were resistant to erythromycin, cefpodoxime
and were mecA positive. PCR amplification of mecA after mix culture plating on
Luria Bertani agar containing 100 ?g/mL showed that 75% of the donor and 58.3% of
the recipient transconjugants were mecA positive. Additionally, 61.5% of both the
donor cells and recipient transconjugants were mecA positive, while 46.2% and
41.75% of both donor and recipient transconjugants were mecA positive on LB agar
containing 50 ?g/mL and 30 ?g/mL respectively. CONCLUSION: In this study, the
direction of transfer of phenotypic resistance as well as mecA was observed to
have occurred from the donor to the recipient strains. This study affirmed the
importance of horizontal transfer events in the dissemination of antibiotics
resistance among different strains of MRSA.