Basic hygiene is considered passé today. That’s why we have MRSA and C-DIFF. It’s not weird organisms mutating. It’s the med/sci establishment deteriorating.
Hand washing between patients is not practiced as rigidly as it once was. We need to put teeth into punishment for failure to hand wash especially when it leads to infections.
Incidentally, have you ever seen the green mold that grows on old oranges. That is old fashioned penicillin. When I am doing a lot of rough work, I keep a moldy orange in the frig, and if I get a cut or scrape rub some of the mold on it or on the bandage. Works fine. Better than dog licks. Also urge people to eat yogurt or probiotics for a week after a course of penicillin.