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Hydrologic Conditions Describe West Nile Virus Risk in Colorado

Author

Listed:
  • Jeffrey Shaman

    (College of Oceanic and Atmospheric Sciences, Oregon State University, 104 COAS Administration Building, Corvallis, OR 97330, USA)

  • Jonathan F. Day

    (Florida Medical Entomology Laboratory, Institute of Food and Agricultural Sciences, University of Florida, 200 9th Street SE, Vero Beach, FL 32962, USA)

  • Nicholas Komar

    (Arbovirus Diseases Branch, Centers for Disease Control and Prevention, 3150 Rampart Road, Fort Collins, CO 80521, USA)

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.

Suggested Citation

  • Jeffrey Shaman & Jonathan F. Day & Nicholas Komar, 2010. "Hydrologic Conditions Describe West Nile Virus Risk in Colorado," IJERPH, MDPI, vol. 7(2), pages 1-15, February.
    • Handle: RePEc:gam:jijerp:v:7:y:2010:i:2:p:494-508:d:7120
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    Citations

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    Cited by:

    1. Anna Yusa & Peter Berry & June J.Cheng & Nicholas Ogden & Barrie Bonsal & Ronald Stewart & Ruth Waldick, 2015. "Climate Change, Drought and Human Health in Canada," IJERPH, MDPI, vol. 12(7), pages 1-54, July.
    2. Simin Mehdipour & Nouzar Nakhaee & Farzaneh Zolala & Maryam Okhovati & Afsar Foroud & Ali Akbar Haghdoost, 2022. "A systematized review exploring the map of publications on the health impacts of drought," Natural Hazards: Journal of the International Society for the Prevention and Mitigation of Natural Hazards, Springer;International Society for the Prevention and Mitigation of Natural Hazards, vol. 113(1), pages 35-62, August.
    3. Xiaobo Liu & Baimaciwang & Yujuan Yue & Haixia Wu & Pengcuociren & Yuhong Guo & Cirenwangla & Dongsheng Ren & Danzenggongga & Dazhen & Jun Yang & Zhaxisangmu & Jing Li & Cirendeji & Ning Zhao & Jimin , 2019. "Breeding Site Characteristics and Associated Factors of Culex pipiens Complex in Lhasa, Tibet, P. R. China," IJERPH, MDPI, vol. 16(8), pages 1-13, April.

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