Oh, and recombination rates, but bacteria are particularly sneaky with horizontal gene transfer

The resistance will eventually be lost. The rate of loss will depend on the initial genetic diversity, mutation rate, reproduction rate, and other evolutionary forces (e.g. what resources are limitted). I don't know a book off hand, but these are all evolutionary genetics questions. I'm sure an introductory text in evolutionary genetics or population genetics will contain most of the answers you're looking for (tip: you don't need the latest version ($$$), anything published in the last ten years will do)