Marin County 

West Nile Virus was first introduced to the United States in 1999, and made its way to California by 2002.  The disease, which is mosquito-borne, is most commonly found to be detrimental to birds, but can also be found in humans and horses.  The following websites explain more on the West Nile Virus epidemic and how to prevent it.

Marin/Sonoma Mosquito & Vector Control District

http://www.msmosquito.com

West Nile Virus Equine Vaccination Information

www.aaep.org/pdfs/AAEP_WNV_Guidelines_2005.pdf
http://www.cdfa.ca.gov/ahfss/ah/wnv_info.htm 
http://www.vetmed.ucdavis.edu/ceh/vaccination.htm

General Information on West Nile Virus Infection in Horses

www.cdfa.ca.gov/ahfss/ah/wnv_info.htm
http://www.avma.org/communications/brochures/wnv/wnv_brochure.asp

West Nile Virus and Wildlife

www.dfg.ca.gov/hcpb/species/threats/threats.shtml

Latest Information on West Nile Virus Case Numbers

http://www.westnile.ca.gov/