Talk about chromosomal resistance for staph aureus.

Mainly methicillin on the antibiogram. We have a gene named mecA which confers to this bacterium its resistance and enables its spread as a community acquired MRSA. It can later acquire resistance to vancomycin and becomes VRSA (vancomycin resistant staph aureus). It is important to know that staph itself contains plasmids that protect it from a lot of antibiotics like tetracyclines, macrolides, amino glycosides…