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5 miles West of Saskatoon, sk
on Highway 14 at Saskatoon Livestock Sales

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Dr. Harvey Domoslai, DVM
Phone: (306) 384-7676
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Horse Owner Today

West Nile, when to vaccinate?

posted by Horse Owner Today    |   March 6, 2012 19:48

Q:  When should horse owners administer their west nile vaccine?

A:  The vaccine will be west nile plus ewt combo vaccine not just west nile virus. Best to give mid May to end of July because west nile is usually an August and September disease.
Boosting will give highest immunity in first 3 to 4 months afterwards even though protective for a whole year.
If you have a pregnant mare vaccinate one month before foaling.
If you have a foal of a vaccinated mare start a series of 3 vaccinations once a month at 3 months.  
If the mare was not vaccinated prior to foaling, start at 5 months which may mean for some it is November by the time foal is 5 months, which is after mosquito season. Those foals can be started on their series the following April so
April-May-June. Dr Lisa Wayman DVM.