West Nile Virus
Equine West Nile Virus Surveillance Data
- 2008 Equine West Nile virus cases - reports and maps showing the number of equine cases of West Nile virus and other equine encephalitides by State and County
- Annual Summary Reports - numbers of confirmed equine West Nile virus cases by State and County
- West Nile Virus Maps, 1999 - 2007. Annual trends in U.S. distribution of equine West Nile virus cases.
- State web sites with equine West Nile virus case reports
- Seasonal Trends - number of cases by date, 2002 through 2005
- USGS West Nile Virus Maps - USGS Disease Maps Web site, produced in coopration with CDC and ArboNET, includes current and historic maps of veterinary, human, bird, sentinel, and mosquito West Nile virus cases by state and county. Note that veterinary maps on this site include data for several animal species in addition to horses (e.g., dogs, rodents).
Surveillance Information
Reports of equine cases of arboviral (i.e., arthropod-borne virus) diseases, including West Nile Virus, are reported to ArboNET, an electronic-based surveillance and reporting system used to track and report arboviral activity. ArboNET captures laboratory-confirmed positive cases in humans, horses, other mammals, birds and mosquitoes across the United States. Equine case-finding varies by State, but primarily relies on passive reporting from private practitioners and diagnostic submissions. In some States, reporting is mandatory.
Disease Information
- West Nile Virus : Protecting Your Horses (Animal Disease Alert, USDA, 2004)
- West Nile Virus Factsheet (APHIS, 10/04)
- Questions & Answers about West Nile Virus (APHIS, 3/03