Is MRSA in infecting or contaminating organism?

In the latest issue of Current Diabetes Reports, Bowling, Jude and Boulton ask the question as if wound colonization by methicillin-resistant Staphylococcus aureus (MRSA) is the cause of infection or just a contaminating organism. A number of studies have found the bacterial content of diabetic foot ulcers to be polymicrobial, so this question as to [...]