There is not a 100% agreement on the subject, but the most common theory is that the plague was a strain of Y. Pestis bacteria. It is also believed that the same bacteria was behind the Plague of Justinian. This plague erupted in the year 541 AD and recurred frequently until the year 750. This plague had a major effect in the collapse of the culture and antiquity and the course of history in the early middle ages.
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The black death, or bubonic plague, was caused by a bacteria, thought to be Yersinia pestis.
The black death is also known as 'The Black Plague' but the scientific name for it is the bubonic plague.
The black death was transmitted in two ways, one by a flea that carried the bacteria in a saliva and the flea bit someone. The second way is called pneumonic plague. In this case, the bacteria travel to the lungs and one a person coughs another person can get the plague.
A bacteria called Yersinia pestis which was carried by rats and the fleas that lived on them
yes it was. and this form of the plague affected the blood and caued the skin to turn black hence the reason they called it the BLACK DEATH