[KITKAT]

Without a vet, this description is problematic. However, misting may make a respiratory infection worse, and tetracycline is hardly the drug of choice IF the snake has pneumonia or other serious respiratory illness.

Of course my first suggestion is a vet. My second suggestion is to stop misting without knowing the relative humidity. A hygrometer is a relatively cheap purchase and is available at pet stores such as Petsmart. ... and my third suggestion would be a more broad spectrum/big gun antibiotic, since tetracycline has now developed MANY organisims that are resistant to that drug.

However, the snake should also be checked for mouth infection, due to the fact of that dark scale.