Yersinia pestis, the Bubonic Plague bacterium, is fatal to rats, humans and fleas. The fleas which live specifically on rats are affected by the bacterium, which lives in their digestive tract and prevents them swallowing. rat fleas quite like human blood, but once having sucked some, find they can't swallow and regurgitate the blood back into the human. human contracts plague in one of 3 forms - bubonic, septicemic or pneumonic. oddly, bubonic is preferable, as the other two are almost invariably fatal. Human dies, rats nibble corpse, rats infected. fleas bite rat, then jump on fresh human....
The Black Death spread across Europe at 4km
Actually, fleas did. They spread on rats which attacked humans.
black death spread in Europe. black death killed 75 to 200 million people.
Black Death or The Black Plague was spread by fleas that were on rats. The Industrial Revolution could be the cause of its rapid spreading, but the cause is actually disputed by many scientists and historians. Many think it spread just because of how contagious it was.
yes, black death was spread in whole Europe. Russia also got black death.
black death was spread by Yersinia pestis bacterium. Rats and fleas help to spread it even more.
The Black Death was spread by fleas and rats. ik..gross
Black Death started in China. And it spread to Europe.
Black Death was started in Mongol army camps. It spread the whole world via Mongol army attacks.
2014
To kill the remaining living viruses and bacteria.
It was spread by fleas carried by Black rats.