I'm going to have to look up the info again, but I just saw some things on this. I believe snakes are not carriers of the disease but at least some lizards and tortoises are. You could still get it from a snake if the snake ate an infected rodent because it would shed the bacteria in it's feces. I've, also, read that dogs get ill from salmonella the same as humans. Salmonella and E. coli are entirely different bacteria. E. coli is a much more serious infection and has caused deaths.

You are much more inclined to get bacterial gastroenteritis from food than a pet due to poor processing practices combined with unsafe food handling on your part.