Agarose gel electrophoresis of multiplex PCR performed in order to identify bacterial species and detect the presence of the mecA gene: M—DNA molecular weight marker 100 bp (GeneRuler 100 bp DNA Ladder, ThermoFisher Scientific), 1-. aureus ATCC 25923 mecA(–) strain, 2-S. aureus ATCC 43300 mecA(+) strain, 3-clinical mecA(+) strain, 4- clinical Staphylococcus epidermidis strain, 5-Staphylococcus haemolyticus ATCC 29970 strain, 6–Staphylococcus epidermidis ATCC 12228 strain, 7-16-clinical Staphylococcus epidermidis strains. List of expected amplicons for (1) species identification: S. aureus-108 bp; S. epidermidis-124 bp; S. haemolyticus-271 bp; (2) mecA gene-154 bp.