Methicillin-resistant S. aureus strains were considered from MDR S. aureus against five or more antibiotics, including OX (50% MDR) from the nine antibiotics used in this study. The selected strains were confirmed by detecting the mecA gene encoding for methicillin resistance by PCR, as described previously by Widianingrum et al. [21 ]. The primers used to detect the mecA gene are listed in Table-1.
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