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The Black Plague!
The general definition of a plague is an epidemic outbreak that causes high rates of mortality.
The name of the bacillus that causes Bubonic plague is Yersinnia pestis.
Yersinia pestis.
The Plague
The two main causes were the rats and the fleas brought from Asia.
infested fleas in rats make it to humans after the host rat dies and infect them with the plague.
Metazoa.
It causes cavities.
Yersinia pestis is the bacillus that causes the Black Death (Bubonic Plague).
the causes of the plague was the fleas on the rats they bit the rats and then when the rats died they moved on to bite the humans