[1]  Kahn, C. M. (editor), The Merck Veterinary Manual, 9^th ed. 2005. Merck & Co., Inc. Whitehouse Station, N.J., USA. 1077-1081.

[2] Castillo-Olivares, Javier and James Wood, West Nile Virus Infection of Horses, Vet. Res. 35 (2004) 467–483 467.

[3] American Association of Equine Practitioners. Retrieved March 19, 2007 
     http://www.aaep.org/pdfs/AAEP_WNV_Guidelines_2005.pdf

[4] Long, M. T. et al, Equine West Nile Encephalitis: Epidemiological and Clinical Review for Practitioners Vol. 48 AAEP Proceedings.

[5] Weese JS, Baird JD, DeLay J, et al. West Nile virus encephalomyelitis in horses in Ontario: 28 cases. Can Vet J 2003; 44:469-473.

[6] Gardner, I.A. et al, Incidence and effects of West Nile virus infection in vaccinated and unvaccinated horses in California. Vet. Res. 38 (2007) 109–116 109.

[7] Castillo-Olivares J, Wood J.  West Nile virus infection of horses.  Vet. Res. 2004; 35:467-483.

[8] West Nile Fact Sheet.  Retrieved March 19, 2007
      http://ohioline.osu.edu/wnv-fact/1007.html   

[9] McGavin M.D. and James F. Zachary.  Pathologic Basis of Veterinary Disease 4^th ed. St. Louis Missouri: Mosby/Elsevier pp. 882-883.

[10]  Long M, Ostlund E, Porter M, Crom R.  Equine West Nile Encephalitis: Epidemiological and Clinical Review for Practicioners.  AAEP Proceedings. 2002; 48:1-6

[11] PreveNile vaccine, Intervet.  Retrieved March 19, 2007
        http://www.prevenile.com/index.asp
 
[12] RecombiTEK vaccine, Merial.  Retrieved March 19, 2007
        http://www.equinewnv.com/

[13]  West Nile-Innovator vaccine, Wyeth.  Retrieved March 19, 2007
         http://www.wyeth.com/products?product=/wyeth_html/home/products/animal_health/West%20Nile-Innovator%C2%AE/West%20Nile-Innovator%C2%AE_overview.html

[14] 2005 Update: West Nile Virus in Horses.  Retrieved March 20, 2007
        http://cvm.msu.edu/Extension/equine/up2004_files/West%20Nile%20Virus.doc

[15]  West Nile Virus, CFIA.  Retrieved March 21, 2007
         http://www.inspection.gc.ca/english/anima/heasan/disemala/wnvvno/wnvfse.shtml