BUBONIC PLAGUE

                                                          The bubonic plague
In the book he tells us that it was the one that changed human history, it is also known as the black plague, bubonic plague. The plague is the cause of the "black death" that spread in Asia, Europe, and Africa in the 14th century and that killed about 100 million people, that is, between 25% and 60% of the European population

This onset by those insects that transmitted was transmitted through flies and fleas spread through the bite or sting of infected insects, there were three outbreaks
Bubonic plague is an infection in the lymphatic system caused by the bite of an infected flea, Xenopsylla cheopis (the rat flea). The flea is a parasite in house and field rats, looking for another prey when the rodent it lives in dies. The bacteria are located in the digestive system of infected fleas in such a way that when the flea bites, it regurgitates the intestinal contents, which infects the point of the bite. In this way the bacteria cross the skin and reach the lymph nodes, where they can resist phagocytosis and even reproduce within the phagocytes and kill them. As the disease progresses, the lymph nodes swell. Bubonic plague can spread to the blood and spread (septicemic plague) or reach the lung and cause pneumonic plague.
You have the following symptoms and symptoms

-Symptoms include:
Cold symptoms.
General feeling of discomfort.
Fever (39 ° C; 102 ° F).
Muscle cramps. 8
Inflammation of the lymph nodes, mainly those located in the groin, armpits and neck.
Pain can occur before swelling appears.
Extremities such as toes, hands, lips, and the tip of the nose begin to gangrene.

Because the plague killed a large part of the working population, wages increased due to the demand for labor. Some historians classify this era as a turning point in European economic development.6 The term “bubonic plague” is derived from the Greek word “βουβών” which means groin.7 The term “buboes” is used to refer to the swollen lymph nodes and groin.


-Causes
Plague bacteria, yersinia pestis, are transmitted to humans when they are bitten by fleas that have previously bitten infected animals, such as:

-Rats
-Mice
-Squirrels
-Rabbits
-Prairie dogs
-Chipmunks
-Topillos