
I'd reconsider, as all bitches and dogs have bacteria, as the area is not sterile, never designed to be. Giving unnecessary antibiotics kills off good flora allowing pathogens reedy access, so more likely to cause a problem trying to be prevented.
We don't have the dangerous Canine Brucellosis in UK, I'd expect in the USA for both to be tested for that.
Males in our breed get so little use, usually with long gaps between matings that the chance of carrying something from bitch to bitch is infinitesimal.