Depending on the bacteria, symptoms could range to almost nothing to devastation.
He could die, or just shrug it off.
I think I payed like $20 for baytril from my vet, but to treat it properly a bacteria culture needs to be done (pretty expensive, I payed $65 for it), and a sensitivity test has to be done to figure which drug works best if there is a bacterial infection.
I wouldn't start worrying about bacteria right away since your snake has normal poop and everything else she does seems normal right? No dehydration, no lethargy, no loosing weight right?
Symptoms I had were: Really nasty undigested mouse poop, a soft lump in the stomach that came and went, lose of weight, and regurgitation.
-13mur 6