It peaked in Europe between and and is thought to have been a bubonic plague outbreak caused by Yersinia pestis, a bacterium. Applications of effective insecticides to control the flea vectors also provide assistance in controlling plague.
They know that the bacillus travels from person to person pneumonically, or through the air, as well as through the bite of infected fleas and rats.
The most commonly noted symptom was the appearance of buboes or gavocciolos in the groin, the neck and armpits, which oozed pus and bled when opened.
In addition to the bubonic infection, others point to additional septicemic a type of "blood poisoning" and pneumonic an airborne plague that attacks the lungs before the rest of the body forms of the plague, which lengthen the duration of outbreaks throughout the seasons and help account for its high mortality rate and additional recorded symptoms.
All diseases spread by cross-infection between humans, on the contrary, gain increasing powers of spread with increasing density of population and cause highest mortality rates in urban centres.
During this last pandemic, scientists identified the causative agent as a bacterium and determined that plague is spread by infectious flea bites. Any information you provide to us via this website may be placed by us on servers located in countries outside of the EU.