Details:

Journal Title:
mBio
Personal Author:
Choi, Seon Young ; Rashed, Shah M. ; Hasan, Nur A. ; Alam, Munirul ; Islam, Tarequl ; ... More +
Choi, Seon Young ; Rashed, Shah M. ; Hasan, Nur A. ; Alam, Munirul ; Islam, Tarequl ; Sadique, Abdus ; Johura, Fatema-Tuz ; Eppinger, Mark ; Ravel, Jacques ; Huq, Anwar ; Cravioto, Alejandro ; Colwell, Rita R. Less -
Description:
An outbreak of cholera occurred in 1991 in Mexico, where it had not been reported for more than a century and is now endemic. Vibrio cholerae O1 prototype El Tor and classical strains coexist with altered El Tor strains (1991 to 1997). Nontoxigenic (CTX−) V. cholerae El Tor dominated toxigenic (CTX+) strains (2001 to 2003), but V. cholerae CTX+ variant El Tor was isolated during 2004 to 2008, outcompeting CTX− V. cholerae. Genomes of six Mexican V. cholerae O1 strains isolated during 1991 to 2008 were sequenced and compared with both contemporary and archived strains of V. cholerae. Three were CTX+ El Tor, two were CTX− El Tor, and the remaining strain was a CTX+ classical isolate. Whole-genome sequence analysis showed the six isolates belonged to five distinct phylogenetic clades. One CTX− isolate is ancestral to the 6th and 7th pandemic CTX+ V. cholerae isolates. The other CTX− isolate joined with CTX− non-O1/O139 isolates from Haiti and seroconverted O1 isolates from Brazil and Amazonia. One CTX+ isolate was phylogenetically placed with the sixth pandemic classical clade and the V. cholerae O395 classical reference strain. Two CTX+ El Tor isolates possessing intact Vibrio seventh pandemic island II (VSP-II) are related to hybrid El Tor isolates from Mozambique and Bangladesh. The third CTX+ El Tor isolate contained West African-South American (WASA) recombination in VSP-II and showed relatedness to isolates from Peru and Brazil. Except for one isolate, all Mexican isolates lack SXT/R391 integrative conjugative elements (ICEs) and sensitivity to selected antibiotics, with one isolate resistant to streptomycin. No isolates were related to contemporary isolates from Asia, Africa, or Haiti, indicating phylogenetic diversity.
Keywords:
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Vibrio cholerae
Source:
mBio. 2016 Mar-Apr; 7(2): e02160-15.
DOI:
https://doi.org/10.1128/mBio.02160-15
Pubmed ID:
26980836
Pubmed Central ID:
PMC4807371
Document Type:
Journal Article
Funding:
Grant no. SO660009
Rights Information:
CC BY
Compliance:
PMC
Main Document Checksum:
[+]
urn:sha256:e5ab4adc5f4ce2c64c0aa12a89f0eedbd01034282f17fce5dc1bcbb0dfa177b2
Download URL:
https://repository.library.noaa.gov/view/noaa/27654/noaa_27654_DS1.pdf
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