Abstract
In 2012, Texas experienced the largest outbreak of human West Nile encephalitis (WNE) since the introduction of West Nile virus (WNV) in 2002. Despite the large number of WNV infections, data indicated the rate of reported WNE among human cases was no higher than in previous years. To determine whether the increase in WNV human cases could have been caused by viral genetic changes, the complete genomes of 17 isolates made from mosquito pools in Dallas and Montgomery Counties in 2012 were sequenced. The 2012 Texas isolates were found to be composed of two distinct clades, both circulating in Dallas and Montgomery Counties despite a 5-fold higher disease incidence in the former. Although minor genetic differences existed between Dallas and Montgomery WNV populations, there was weak support for population subdivision or adaptive changes. On the basis of these data, alternative explanations for increased WNV disease incidence in 2012 are proposed.
| Original language | English (US) |
|---|---|
| Pages (from-to) | 205-210 |
| Number of pages | 6 |
| Journal | American Journal of Tropical Medicine and Hygiene |
| Volume | 89 |
| Issue number | 2 |
| DOIs | |
| State | Published - Aug 1 2013 |
| Externally published | Yes |
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ASJC Scopus subject areas
- Parasitology
- Infectious Diseases
- Virology
Cite this
Sequence analyses of 2012 West Nile virus isolates from Texas fail to associate viral genetic factors with outbreak magnitude. / Duggal, Nisha K.; D'Anton, Mary; Xiang, Jeannie; Seiferth, Robyn; Day, Joanne; Nasci, Roger; Brault, Aaron.
In: American Journal of Tropical Medicine and Hygiene, Vol. 89, No. 2, 01.08.2013, p. 205-210.Research output: Contribution to journal › Article
}
TY - JOUR
T1 - Sequence analyses of 2012 West Nile virus isolates from Texas fail to associate viral genetic factors with outbreak magnitude
AU - Duggal, Nisha K.
AU - D'Anton, Mary
AU - Xiang, Jeannie
AU - Seiferth, Robyn
AU - Day, Joanne
AU - Nasci, Roger
AU - Brault, Aaron
PY - 2013/8/1
Y1 - 2013/8/1
N2 - In 2012, Texas experienced the largest outbreak of human West Nile encephalitis (WNE) since the introduction of West Nile virus (WNV) in 2002. Despite the large number of WNV infections, data indicated the rate of reported WNE among human cases was no higher than in previous years. To determine whether the increase in WNV human cases could have been caused by viral genetic changes, the complete genomes of 17 isolates made from mosquito pools in Dallas and Montgomery Counties in 2012 were sequenced. The 2012 Texas isolates were found to be composed of two distinct clades, both circulating in Dallas and Montgomery Counties despite a 5-fold higher disease incidence in the former. Although minor genetic differences existed between Dallas and Montgomery WNV populations, there was weak support for population subdivision or adaptive changes. On the basis of these data, alternative explanations for increased WNV disease incidence in 2012 are proposed.
AB - In 2012, Texas experienced the largest outbreak of human West Nile encephalitis (WNE) since the introduction of West Nile virus (WNV) in 2002. Despite the large number of WNV infections, data indicated the rate of reported WNE among human cases was no higher than in previous years. To determine whether the increase in WNV human cases could have been caused by viral genetic changes, the complete genomes of 17 isolates made from mosquito pools in Dallas and Montgomery Counties in 2012 were sequenced. The 2012 Texas isolates were found to be composed of two distinct clades, both circulating in Dallas and Montgomery Counties despite a 5-fold higher disease incidence in the former. Although minor genetic differences existed between Dallas and Montgomery WNV populations, there was weak support for population subdivision or adaptive changes. On the basis of these data, alternative explanations for increased WNV disease incidence in 2012 are proposed.
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UR - http://www.scopus.com/inward/citedby.url?scp=84881518892&partnerID=8YFLogxK
U2 - 10.4269/ajtmh.13-0140
DO - 10.4269/ajtmh.13-0140
M3 - Article
C2 - 23817333
AN - SCOPUS:84881518892
VL - 89
SP - 205
EP - 210
JO - American Journal of Tropical Medicine and Hygiene
JF - American Journal of Tropical Medicine and Hygiene
SN - 0002-9637
IS - 2
ER -