Paramyxovirus

I'm not sure, but that sounds similar to the name of the disease that Jen Harrison (hope I have that name right) had wipe out her collection. Or at least it might have been what was responsible. Last I read I think she still did not have a definitive answer. Are you familiar with that story? Does it seem similar to what you saw?

Scary stuff no matter what. I'd definitely want to go with further testing to find out for sure what it was, especially if there was any chance your other animals were exposed.