If salmonella is the big concern here then I hope you don't have any cats or dogs. Their feces can also transmit salmonella. Not implying your kids play with poop lol but I too have small children and they will sometimes "help" clean the litter box or pick up dog poo in the yard. We're cautious and we've never had an issue but that's not to say there isn't risk. My point is the reptiles themselves aren't solely to blame. Whether they're the culprits or not many diseases- salmonella included -can be transmitted by all animals not just reptiles.