I don't remember reading about these in any of the in-game books in Oblivion. Were there multiple sorts of were-isms in some of the earlier games?
It would seem problematic if they were included in Skyrim because then not only would you need to be careful about catching vampirism, but also wouldn't each of these creatures have a different sort of disease?
I imagine it would be a bit annoying to catch multiple were-pig, were-bear, were-crocodile, etc., diseases and keep turning into so many different animals. If you have vampirism and then you are bitten by a were-boar and a were-whatever, then what happens?
Personally I have no problem if they are included, but I'm just trying to understand the mechanics.