It is really nothing new. It has been known that antibiotics kill the good bacteria in your gut for years, hence the common problem of diarrhea after taking them. Yogurt and pro-biotic supplements are a good cure.
Also, buttermilk is a great natural cure for a vaginal yeast infection. My wife informs me that the buttermilk is also very soothing.
So with the buttermilk.
Drink it or soak in it, cold?
For men, nystatin cream for rear end yeast rash when the runs from antibio hit.