2.7. Data analysis
Gels were photographed and digitized with the FOTO/Analyst
Archiver system, and an analysis with BioNumerics version 2.0
software was conducted (Applied Maths, Belgium). The S. aureus
ATCC 43300 and ATCC 25923 strains were used as reference
standards for MRSA and methicillin-susceptible S. aureus
(MSSA), respectively. A Wilcoxon test (paired) was used to
compare the antibiotic susceptibility of MRSA and MSSA isolates
against different antimicrobial agents, and it was also used to
compare the MICs of MRSA and MSSA isolates against oxacillin