reference : Hydrologic conditions describe West Nile virus risk in Colorado

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reftype Journal Article
Abstract We examine the relationship between hydrologic variability and the incidence of human disease associated with West Nile virus (WNV; family Flaviviridae, genus Flavivirus) infection (hereafter termed "human WN cases") in Colorado from 2002 to 2007. We find that local hydrologic conditions, as simulated by the Mosaic hydrology model, are associated with differences in human WN cases. In Colorado's eastern plains, wetter spring conditions and drier summer conditions predict human WN cases. In Colorado's western mountains, drier spring and summer conditions weakly predict human WN cases. These findings support two working hypotheses: (1) wet spring conditions increase the abundance of Culex tarsalis vectors in the plains, and (2) dry summer conditions, and respondent irrigational practices during such droughts, favor Cx. pipiens and Cx. tarsalis abundance throughout Colorado. Both of these processes potentially increase the local vector-to-host ratio, favoring WNV amplification among competent avian hosts and bridging to humans.
Author Shaman, J.; Day, J. F.; Komar, N.
DOI 10.3390/ijerph7020494
Date Feb
ISSN 1660-4601
Issue 2
Journal International Journal of Environmental Research and Public Health
Keywords Colorado/epidemiology; Humans; Risk Factors; *Water Movements; West Nile Fever/*epidemiology
Notes Shaman, Jeffrey Day, Jonathan F Komar, Nicholas eng Switzerland 2010/07/10 06:00 Int J Environ Res Public Health. 2010 Feb;7(2):494-508. doi: 10.3390/ijerph7020494. Epub 2010 Feb 11.
Pages 494-508
Title Hydrologic conditions describe West Nile virus risk in Colorado
Volume 7
Year 2010
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.reference_type 0
_record_number 18035
_uuid 56d62d2b-1544-45fa-9336-aaf3708df8d0