Many years ago, I worked as an orderly in a major university hospital. There was one surgeon whose patients almost always seemed to have post-operative infections. He was a great surgeon, technically, and back in those days such infections were not all that uncommon, and were mostly treatable. The really nasty antibiotic resistant strains were just evolving. At any rate, he was a known Staph carrier, and he was not prevented from performing surgical procedures. I think, in these days, that would not be permitted. In many major hospitals, perhaps all, there are specialists who watch for just that kind of problem. I didn't read the link, but the fact that it was posted probably confirms my comment. Will it still happen? Of course, but at least now when something like that comes to light it is dealt with. Probably with as little fanfare as possible.
Chuck