I got a staph infection from our medical clinic. It was years ago, I was cleaning in one of the exam rooms and took off my gloves because my hands were sweating. A day or so later I was in the drs office and he told me I had picked up a staff infection.
I have often pricked my finger while sewing and I never wash my fabrics and I have yet to pick up a staff infection from the fabrics or dyes. Maybe there is more to this person's story than what was told.