I just recovered from eight months of the runs after a dose of antibiotics. This is tricky stuff. There are apparently ways to repopulate your gut, but they aren’t considerd unless you are nearly dead.
If Super-antibiotics become common, we’ll need to rethink all this.
It is irresponsible for a doctor to prescribe an antibiotic without also prescribing a probiotic but they just won’t do it. I’ve had a couple of relatives near death because of doctors’ stupidity on this subject.