Honestly you are over thinking this way too much, I’m not being rude but you are causing yourself extreme anxiety over nothing. I read the article about the people contracting salmonella from the rats and other rodents and if I read it correctly all the cases were caught by animals recently purchased from a pet store. You said your friend has had these for awhile correct? Given the pets didn’t act sick and they keep their cage clean you have very little to worry about. I understand this can be extremely touchy for you but I don’t think any one who has commented has been rude or condescending or hostile. They’ve been honest. Literally salmonella or anything just can’t jump from your coat to the back of your throat for you to swallow it and even if there was potentially anything on your jacket, which I HIGHLY doubt it simply touched your skin. I’ve never heard of hot water making salmonella grow or be “active” to make you sick. And it’s just the same as a virus the animal has to actually HAVE it for you to possibly contract it. It’s the same with chicken, not all chickens have salmonella and even if it does you don’t eat it raw you cook it then consume it.