The first comment is a culture must be done BEFORE antibiotics after they have been given result is biased results and 3 months must pass before it can be re-tested. You'll forgive me but n 'expert' should have mentioned this little tidbit of knowledge.

Snakes have an extremely slow metabolism, the proof, humans digest food in an hour, snakes 24+. The time it takes drugs to work and be effective is far longer (usually just starting at what would be the end of a human cycle). I would suggest that a breeding a sick snake places that snake in harms way. There is a better chance for a re-lapse/ complications. The question is how long I would figure at least twice the time for a often recommended drug cycle, so 3 months maybe more just to be safe.