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Bubonic Plague

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Jackie Hernandez

on 23 October 2014

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Transcript of Bubonic Plague

The Black Death was one of the worst natural disasters in history, in 1347 A.D. one third of Europe's population lost their lives. Rats swarmed the streets of Europe which were infected with fleas which carried highly infectious bacteria of the Yersinia species. These fleas can turn to humans as a food source and transmit the bacteria which in turn can infect human fleas and so transmit the disease from human to human.
Yersinia bacteria multiply in humans and inject toxins into cells, making the host unable to fight the infection
Yersinia pestis are bacteria that can infect human lymph nodes which leads to discoloured swelling called buboes. This diseases can be entered through inhalation
Another strain, Yersinia entercolitica, enters through the gut and travels to the lymph nodes.
Yersinia pestis can also lead to the black plague where the bacteria enters the victim's blood and causes a septic shock, where discoloration of the skin is due to coagulation of blood
Ring a Ring O'Roses,

A pocketful of Posies

Ashes! Ashes!

We all fall down!
Mortality Rate
Bubonic Plague
Today antibiotics can kill the disease so any case of the plague are rare
How It Enters
Your Body

One of the first symptoms of the plague was a ring of red (rose) colored spots

A posy of herbs was meant to protect against the disease

People would burn the dead bodies
back then
approx 50-60%
from 1987 - 2001
bubonic: untreated 50-90%, treated 5-15%
pulmonary : 100% untreated , 50% with antibiotics
Streptomycin 1 dose for 10 days
aminoglycoside gentamicin
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