i can add that even if your snake is just sick with something as simple as a respiratory infection its important to make sure your vet is properly doing his/her job. i learned the hard way.
i had ordered a snake online that came in sick. he had a respiratory infection and the seller was unwilling to take the animal back. so i took it to the vet and he said ok we will start him on baytril. he did no culture or sensitivity tests. even though i asked him to. he said their was no need as baytril was a broad spectrum anti biotic and it would wipe it out. well after a weeks worth of treatment snake showed no signs of getting better and died a few weeks later.
after reading on the boi of a few people that had bought from him ended up with uri and it was discovered that it was a common strain that was stronger than most and needed amakacin to wipe it out.
IF my vet had done the test he should have known what coarse of treatment to take.
adam jeffery