How do i tell difference between mrsa and a diaper rash?

Crusting: It's not always possible, but a staph infection like MRSA would more likely cause scabs and oozing, sometimes referred to as honey-colored crusts. There may also be blisters, or bullous impetigo, more common in the very young.

Superficial vs deep: With any given swab you could find MRSA on almost any body surface as a benign contaminant.As in infecting agent it tends to burrow down into the depth of the skin & form puss bearing abscesses. Regular diaper rashes tend to remain superficial, rough areas on the top of the skin.