Talk about brutality

We all know what Bubonic Plague did to Europe in the old days.

Mortality rates of 30 to 75 percent for bubonic, 90 percent for pneumonic and close to 100 percent for septicemic.

But check this out: it kills its vector, too! That's right -- the human dies, the rat dies and the fucking flea dies as well!

The bacteria multiplies inside a flea, blocking its stomach and causing it to become very hungry. The flea then voraciously bites a host and continues to feed because it is unable to satisfy its hunger. During the feeding process, infected blood carrying the plague bacteria flows into the wound. The plague bacteria then has a new host, and the flea eventually dies from starvation.

Source

Nasty, nasty, nasty.