there is not information that's exactly the same bacteria and that drugs work. It might be novel one or modified in the lab. Even for flu we don't have general vaccine that works.
It’s bacteria, antibiotics work more generally than vaccines for viruses do.
There are of course, antibiotic resistant bacteria but we still have some exotic antibiotics in our arsenal.
If anything for a widespread bacterial plague I’d be more concerned about our ability to produce enough antibiotics rather than _if_ we could develop a cure