Quote Originally Posted by jknudson View Post
A freshwater soak is really only beneficial to hydrate the snake, and it really isn't going to disinfect him/her.

Just be sure to wash your hands after handling. Like Pat linked to, salmonella in captive reptiles is pretty uncommon. However, snakes aren't exactly "tidy"...they'll spray urates and climb through their own waste on occasion. Keep the enclosure clean and wash those hands!
Agreed, I see no need to sanitize a snake, but should you want to clean him/her for any reason such as being covered in poo, the only thing I would suggest is water. To disinfect, clean yourself