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Know your enemy: The Evolution of a Species
Antiqua - plague pandemic 6th Century
Contributed to the fall of the Roman Empire
Medievalis - Black death
Wiped out a minimum of 40% of Europe
Orientalis - Current Plague
Yersinia pestis has shaped human history.
Demographic of Crossrail Victims
Genus: Yersinia
15 species under Yersinia
Only 3 of them pathogenic to mammals
Y. pestis
Y. pseudotuberculosis
18 - 45 Year Olds
3 Women
13 Men
The black death may seem like a distant past...
But you carry the mark inside you
All plague [Y. pestis] strains around the world are capable of causing human disease, and if conditions were right, would probably be capable of causing these large pandemics again,” - David Wagner
The accepted explanation as to why there is so much auto immune disease in the developed world and virtually none in the developing world.
The black death wiped out a huge amount of Europe. If you're of European descent then you will hold the mark of 14th Century disaster within your genome.
The science-ey terms:
Convergent evolution of immune related genes in Europeans during the black death possibly lent protection against subsequent exposure and led to a susceptibility to auto - immune diseases.
"It is the truth universally acknowledged, that Yersinia pestis caused the black death...."
Identified as Yersinia pestis
DNA match of 14th Century strain of the bacterium
Minor sequence variation
Evolved in/near China
several genes under evolutionary pressure in European/Romanian and Rroma/Gipsy populations
The black death was a natural selection event on a huge scale.
This was nature recapturing our species.
This was another species, capturing ours.
S.E. Aisa
Anaerobic bacterium
Infects humans and animals
Three main forms:
Pneumonic
Septicemic
Bubonic
Can be used as a bioweapon
Africa
South America
Europe
Ancient Plague, Modern Menace.
Not a 'thing of the past'