Originally posted by Sherasi:
I had a pet rat.. but it was a 2000th (or something

) generation white lab rat that had fewer germs than I did.

I suspect street rats would be a lot more dangerous, but you could talk to the vet and discuss it. I would figure there is no real way to innoculate against some illness and disease.
But I definitely recommend rats for pets.. I have had a total of 4 of them in our family. I had a delicate little lady named "Brisby". She was intelligent, loving, would sit on my shoulder and ride around. You can get one for about $3 at a local pet store and we just used a fish aquarium with cedar chips, water bottle, etc.
Really, the same as how a gerbil would be housed is how we housed Brisby.
I am sorry, you might just have to put that wild fellow down if the vet doesn't give a go ahead. Personally, I think it is just a bit too dangerous.