Bubonic Plague question

Okay so I’m doing something on the bubonic plague for school and I need to know how the carrier was identified. So can anyone link me a site telling me this?

How? I have no idea. But As you may know it was Fleas that Came off rats from some where like China.

Big Nutter
I Skimed over this since I was at “My Name is Dave. What your name.” when I first Did it

http://www.cdc.gov/ncidod/dvbid/plague/

<a href=“http://www.cdc.gov/ncidod/dvbid/plague/world98.htm” target=“new”>Distribution of Plague, 1970-1998</a>

That’s ever so comforting. o_O;

Thank you very much