There are many different seroyypes of Salmonella and they can be passed to humans but some are pretty specific to certain hosts. You can be pretty sure that if you get a certain strain you would have contracted it from lizards, turtles, chickens or sparrows etc. That doesn't make it any worse and your advice to wash hands after handling any animal is the way to go. I wish sometimes that the powers that be would tell the truth a bit more often. To ban anything because it can carry Salmonella is a load of the best, but to ban it because it might eat trout or salmon eggs is another thing. I have investigated Salmonella cases that could be pretty well traced back to lizards on the west coast, chickens from Australia, and sparrows amongst other things, all by the identified serotype. The problem is that by the time you get the results of the serotyping the case is well down the track. Some serotypes are more virulent than others and typhoid is a Salmonella (Salmonella typhi). I feed fish to my turtles and the river they come from may well contain Salmonella and campylobacter because there are emergency overflows from the sewer going into it as well as stormwater which no doubt picks up messages left by birds, cats and dogs etc. There are germies out there so get used to it.