Bubonic plague, when the germs were carried in the bloodstreams of fleas and if the rats were biten by the fleas, then the rats were infected and the plague was passed on. It is the best-known manifestation of the bacterial disease plague, caused by the bacterium Yersinia pestis. Plague is a deadly Infectious disease caused by the enterobacteria Yersinia pestis (Pasteurella pestis. Yersinia pestis (formerly Pasteurella pestis) is a Gram-negative rod-shaped Bacterium belonging to the family Bubonic plague is often used synonymously for plague, but it does in fact refer specifically to an infection that enters through the skin and travels through the lymphatics, as is often seen in flea-borne infections. Bubonic Plague kills about 70% of patients in 4-7 days.

Contents 1 Pathology and transmission 2 Symptoms 3 See also 4 Notes

Pathology and transmission

The Bubonic plague is an infection of the lymphatic system, usually resulting from the bite of an infected flea. The lymphatic system in Vertebrates is a network of conduits that carry a clear fluid called Lymph. Flea is the Common name for any of the small wingless Insects of the order Siphonaptera (some authorities use the name Aphaniptera The bacteria rapidly spreads to the lymph nodes and multiply. Yersinia pestis can resist phagocytosis and even reproduce inside phagocytes and kill them. Phagocytes are cells that are found in the blood bone marrow and other tissues of Vertebrates. As the disease progresses, the lymph nodes can hemorrhage and become necrotic. Bleeding, technically known as hemorrhaging / haemorrhaging (see American and British spelling differences) is the loss of Blood from Necrosis (in Greek Νεκρός = "dead" is the name given to unnatural Death of cells and living tissue. Bubonic plague can progress to lethal septicemic plague in some cases. Septicemic (or septicaemic) plague is a deadly blood infection by Yersinia pestis, a Gram-negative Bacterium.

Symptoms

The most famous symptom of bubonic plague are swollen lymph nodes, called buboes. These are commonly found in the armpits, groin or neck. The Bubonic Plague was the first step of the ongoing Plague. The two other forms of the Plague, Pneumonic and Septicemic, resulted after a patient with the Bubonic Plague developed Pneumonia or blood poisoning.

See also

• Plague
• The Black Death
• List of historical plagues

Notes

Plague is a deadly Infectious disease caused by the enterobacteria Yersinia pestis (Pasteurella pestis. The Black Death, or the Black Plague, was one of the deadliest Pandemics in human history widely thought to have been caused by a bacterium named Yersinia In human history the term plague refers to an Epidemic disease causing a high rate of mortality i

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