USDA - APHIS - Animal Health Monitoring & Surveillance

West Nile Virus - States with Equine Cases

West Nile Virus, 2012 - States with Equine Cases
Total Cases - 618 (last updated 12/11/2012)

2012 equine cases of West Nile virus in each State

West Nile Virus, 2011 - States with Equine Cases
Total cases - 87

US map showing the number of equine West Nile virus cases in each State

West Nile Virus, 2010 - States with Equine Cases
Total cases - 125

Equine cases of West Nile Virus for 2010 - preliminary

West Nile Virus, 2009 - States with Equine Cases
Total Cases - 276

Map of US showing 2009 distribution of equine WNV cases

West Nile Virus, 2008 - States with Equine Cases
Total Cases - 179

Map of U.S.

West Nile Virus, 2007 - States with Equine Cases
Total Cases - 468

equine West Nile virus cases for 2007 map

West Nile Virus, 2006 - States with Equine Cases
Total Cases - 1,086

West Nile Virus, 2005 - States with Equine Cases
Total Cases - 1,088

West Nile Virus, 2004 - States with Equine Cases
Total Cases - 1,406

West Nile Virus, 2003 - States with Equine Cases
Total Cases - 5,181

West Nile Virus, 2002 - States with Equine Cases
Total Cases - 15,257

West Nile Virus, 2001 - States with Equine Cases
Total Cases - 738

West Nile Virus, 2000 - States with Equine Cases
Total Cases - 60

West Nile Virus, 1999 - States with Equine Cases
Total Cases - 25