A GIS tool to estimate West Nile virus risk based on a degree-day model |
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| Authors: | Zou Li Miller Scott N Schmidtmann Edward T |
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| Institution: | (1) Department of Renewable Resources, University of Wyoming, Box 3354, 1000 E. University Drive, Laramie, WY 82071, USA;(2) Arthropod-Borne Animal Disease Research Laboratory, USDA-ARS, Box 3965, University Station, Laramie, WY 82070, USA |
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| Abstract: | West Nile virus (Flaviviridae: Flavivirus) is a serious infectious disease that recently spread across the North America continent. A spatial analysis tool was developed
on the ArcMap 9.x platform to estimate potential West Nile virus activity using a spatially explicit degree-day model. The
model identifies when the virus Extrinsic Incubation Period (EIP) is completed within the vector longevity during mid-summer
months. The EIP is treated as a threshold indicator of the potential for virus emergence and activity. Comparing the number
of West Nile virus cases in Wyoming reported from 2003 to 2005 with model results, actual cases and predicted events of West
Nile virus activity match relatively well. The model represents a useful method for estimating potential West Nile virus activity
in a large spatial scale. |
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| Keywords: | West Nile virus GIS Degree-day Risk assessment |
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