By fleas which were carried around by rats.
black death Plague was spread via silk road. Mongol armies also spread it.
rats infestation or spread of bubonic plague from rats.
Fleas on rats
Black Death Plague spread from country to country. It spread across whole Europe.
The plague spread from south to north.
Black Death was caused by Mongols. They caused the Plague to spread.
The black death was spread by the oriental rat flea, who got it from sucking the blood of black rats.
I believe rats was the first to carry the black death, they were called the black rats and the plague was spread to humans, that's what i was told in my history lesson:)
Black Death Plague had spread across Europe. It also spread in Russia and other northern empires as well.
it spread from the Mediterranean to the north of europe
the black death (bubonic plague) was mainly in Europe but spread on ships abroad by the fleas on rats
Black Death was spread due to dead rats and dead bodies. Cleaning them prevented Plague spread as there are no fleas.