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.jpg): Failed to open stream: No such file or directory in C:\Inetpub\vhosts\kidney.de\httpdocs\pget.php on line 117 Front+Microbiol
2015 ; 6
(ä): 1120
Nephropedia Template TP
gab.com Text
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English Wikipedia
The out-of-the-delta hypothesis: dense human populations in low-lying river
deltas served as agents for the evolution of a deadly pathogen
#MMPMID26539168
Boucher Y
; Orata FD
; Alam M
Front Microbiol
2015[]; 6
(ä): 1120
PMID26539168
show ga
Cholera is a diarrheal disease that has changed the history of mankind,
devastating the world with seven pandemics from 1817 to the present day. Although
there is little doubt in the causative agent of these pandemics being Vibrio
cholerae of the O1 serogroup, where, when, and how this pathogen emerged is not
well understood. V. cholerae is a ubiquitous coastal species that likely existed
for tens of thousands of years. However, the evolution of a strain capable of
causing a large-scale epidemic is likely more recent historically. Here, we
propose that the unique human and physical geography of low-lying river deltas
made it possible for an environmental bacterium to evolve into a deadly human
pathogen. Such areas are often densely populated and salt intrusion in drinking
water frequent. As V. cholerae is most abundant in brackish water, its favored
environment, it is likely that coastal inhabitants would regularly ingest the
bacterium and release it back in the environment. This creates a continuous
selection pressure for V. cholerae to adapt to life in the human gut.