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Plague in humans 'twice as old' but didn't begin as flea-borne, ancient DNA reveals
EurekAlert! ^ | October 22, 2015 | University of Cambridge

Posted on 07/28/2019 2:16:56 PM PDT by SunkenCiv

New research using ancient DNA has revealed that plague has been endemic in human populations for more than twice as long as previously thought, and that the ancestral plague would have been predominantly spread by human-to-human contact -- until genetic mutations allowed Yersinia pestis (Y. pestis), the bacteria that causes plague, to survive in the gut of fleas.

These mutations, which may have occurred near the turn of the 1st millennium BC, gave rise to the bubonic form of plague that spreads at terrifying speed through flea -- and consequently rat -- carriers. The bubonic plague caused the pandemics that decimated global populations, including the Black Death, which wiped out half the population of Europe in the 14th century.

Before its flea-borne evolution, however, researchers say that plague was in fact endemic in the human populations of Eurasia at least 3,000 years before the first plague pandemic in historical records (the Plague of Justinian in 541 AD).

They say the new evidence that Y. pestis bacterial infection in humans actually emerged around the beginning of the Bronze Age suggests that plague may have been responsible for major population declines believed to have occurred in the late 4th and early 3rd millennium BC...

The Books of Samuel in the Bible describe an outbreak of plague among the Philistines in 1320 BC, complete with swellings in the groin, which the World Health Organization has argued fits the description of bubonic plague. Mirazón-Lahr suggests this may support the idea of a Middle Eastern origin for the plague's highly lethal genetic evolution.

(Excerpt) Read more at eurekalert.org ...


TOPICS: History; Science; Travel
KEYWORDS: afanasievo; antonineplague; blackdeath; blackplague; bronzeage; bubonicplague; byzantineempire; epidemics; epidemiology; godsgravesglyphs; health; helixmakemineadouble; justinianplague; justiniansplague; pandemics; philistines; plague; plagueofathens; plagueofjustinian; plagues; romanempire; thesniffles; yamnaya; yersiniapestis
Yamnaya people moved into Central Asia from the region around present day Caucasus in early Bronze Age (c. 5000 years ago) and developed the Afanasievo culture. The Afanasievo are one of the Bronze Age groups carrying Y. pestis. Credit: Natalia Shishlina

Yamnaya people moved into Central Asia from the region around present day Caucasus in early Bronze Age (c. 5000 years ago) and developed the Afanasievo culture. The Afanasievo are one of the Bronze Age groups carrying Y. pestis. Credit: Natalia Shishlina

1 posted on 07/28/2019 2:16:56 PM PDT by SunkenCiv
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To: StayAt HomeMother; Ernest_at_the_Beach; 1ofmanyfree; 21twelve; 24Karet; 2ndDivisionVet; 31R1O; ...
the rest of the Afanasievo keyword:

2 posted on 07/28/2019 2:17:34 PM PDT by SunkenCiv (Imagine an imaginary menagerie manager imagining managing an imaginary menagerie.)
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Yersinia Pestis keyword, chrono sorted:

3 posted on 07/28/2019 2:21:28 PM PDT by SunkenCiv (Imagine an imaginary menagerie manager imagining managing an imaginary menagerie.)
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To: SunkenCiv
I'm currently (though not at this moment) watching a Great Courses series on the Black Death. One point that's been brought up both in the course and in my reading is that, although we're pretty darn sure that Yersinia pestis is "Bubonic Plague," we're not nearly as sure that there weren't other causes of death kicking around at the same time.

Also, the lecturer wears very slimming outfits, which I will copy if I'm invited to appear on "Jeopardy!".

4 posted on 07/28/2019 2:25:47 PM PDT by Tax-chick (It's the guitar solo! Everybody polka!!!)
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To: SunkenCiv

It appears the flea-borne virus is more preferable, maybe that’s why Los Angeles is breeding them


5 posted on 07/28/2019 2:29:12 PM PDT by eyeamok
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To: Tax-chick

Well if rats carry the fleas carrying the plague. LA and Baltimore are off my vacation list. Don’t need no “Ring Around The Rosey” .


6 posted on 07/28/2019 2:32:46 PM PDT by Equine1952 (Get yourself a ticket on a common mans train of thought)
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To: Equine1952

U.S. cases of plague are usually in the desert Southwest. Numbers go up during drought, when infected mice and jerboa and stuff move into suburbs looking for irrigation. A few people die from time to time because they didn’t know what they had until too late.

There’s no indication of its being transmitted into urban populations, even in its endemic areas, at this time.


7 posted on 07/28/2019 2:37:40 PM PDT by Tax-chick (It's the guitar solo! Everybody polka!!!)
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To: Tax-chick
It was in vogue a few years back to deny Y. Pestis as the cause of The Plague, but DNA research has taken a chain saw to that silly notion. But yeah, there are always different causes of death, and most of them have come and gone a few times, due to non-human reservoirs. Smallpox emerged perhaps no more than 3K years ago, and has no known non-human host -- the eradication program worldwide has worked -- the CDC says no cases since 1980. The Egyptian 18th Dynasty pharaohs' mummified remains have survived for the most part, and the non-invasive study (CAT scans and whatev') have shown the lesions on at least two of them.

8 posted on 07/28/2019 2:54:25 PM PDT by SunkenCiv (Imagine an imaginary menagerie manager imagining managing an imaginary menagerie.)
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To: Tax-chick

Well that’s nice to know. I still wouldn’t go to LA or Baltimore if Nasty Pelosi and Cummings paid for the trips. As a kid I spent time shooting rats. I bet the locals in either location wouldn’t appreciate that. We’ll see if the poem comes back, history has a way of repeating itself.


9 posted on 07/28/2019 2:59:00 PM PDT by Equine1952 (Get yourself a ticket on a common mans train of thought)
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To: SunkenCiv

The lecturer said that the experience of England with the Black Death suggests anthrax was going on at the same time, described in contemporaneous sources as “a cattle murrain.”


10 posted on 07/28/2019 3:01:24 PM PDT by Tax-chick (It's the guitar solo! Everybody polka!!!)
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To: Equine1952

Plague is very treatable if it’s caught early. Should it appear in an urban setting in the U.S. today, it would have a different profile than in, say, 1347 Florence.


11 posted on 07/28/2019 3:02:51 PM PDT by Tax-chick (It's the guitar solo! Everybody polka!!!)
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To: Tax-chick
Diagnosis was pretty sophisticated even before the emergence of microbiology.

12 posted on 07/28/2019 3:12:24 PM PDT by SunkenCiv (Imagine an imaginary menagerie manager imagining managing an imaginary menagerie.)
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To: SunkenCiv

The pneumonic form of plague is directly human-to-human contagious, so the jump to fleas may have been a lateral species jump providing another disease vector and an additional reservoir in infected animals. Cheery thought - what we have today is the new, improved version.


13 posted on 07/28/2019 3:20:31 PM PDT by Billthedrill
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Regarding this snip of the original excerpt up top:
The Books of Samuel in the Bible describe an outbreak of plague among the Philistines in 1320 BC, complete with swellings in the groin, which the World Health Organization has argued fits the description of bubonic plague. Mirazón-Lahr suggests this may support the idea of a Middle Eastern origin for the plague's highly lethal genetic evolution.
Philistines keyword, edited, chrono sort:

14 posted on 07/28/2019 3:28:12 PM PDT by SunkenCiv (Imagine an imaginary menagerie manager imagining managing an imaginary menagerie.)
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To: SunkenCiv
genetic mutations can't happen
see: Mathematical Challenges to Darwin’s Theory of Evolution with Berlinski, Meyer, and Gelernter
15 posted on 07/28/2019 3:47:57 PM PDT by PIF (They came for me and mine ... now it is your turn ...)
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To: PIF
They'll stone you when you try to go home.

16 posted on 07/28/2019 3:52:56 PM PDT by SunkenCiv (Imagine an imaginary menagerie manager imagining managing an imaginary menagerie.)
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To: Billthedrill
Smallpox started as a mutation from a rat-borne bug of some sort.

17 posted on 07/28/2019 4:04:17 PM PDT by SunkenCiv (Imagine an imaginary menagerie manager imagining managing an imaginary menagerie.)
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To: SunkenCiv

Yes, but there’s a lot of ground between the 14th century and microbiology, and documentation doesn’t always make stuff clear.


18 posted on 07/28/2019 4:33:46 PM PDT by Tax-chick (It's the guitar solo! Everybody polka!!!)
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To: Tax-chick

Read years ago that during the time of the Black Death there was an colder than normal period bringing the rats in closer to humans.

Thank God we have global warming!!!


19 posted on 07/28/2019 5:20:44 PM PDT by lizma2
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To: lizma2

There was a heavy rain spell with subsequent famine. The really cold hit in the late 1500s.

The cold-so-rats-move-in theory for the Black Death has taken some hits, but the population-crunch theory is still holding water.


20 posted on 07/28/2019 5:35:37 PM PDT by Tax-chick (It's the guitar solo! Everybody polka!!!)
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