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Equine West Nile Virus Case Reporting and Surveillance Information

Annual Summary Reports 2006-2018.
Number of confirmed eastern equine West Nile cases by State and County.

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.

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