All bites are off - fleas did spread plague (From Worcester News)
I think we heard about this earlier: DNA evidence from medieval (14th cent.) skeletons shows Yersinia pestis, the bug that causes bubonic plague. Apparently this "proves" that the Black Death was not some other disease: did anybody really think it wasn't Y. pestis? I've heard people float ideas like anthrax alongside Y. pestis, but is this really necessary? I guess it is cool to have DNA evidence, though.