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Dr. Harvey Domoslai, DVM
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Horse Owner Today

Recovering West Nile Horse

posted by Horse Owner Today    |   September 7, 2013 11:32

Saskatchewan West Nile Virus Confirmed Cases

posted by Horse Owner Today    |   September 6, 2013 07:10

During the month of August, two horses in Saskatchewan were confirmed to have West Nile
Virus (WNV). Both horses were treated and have recovered uneventfully. The first case, reported on August 6, occurred in RM 222 (Craik). The latter case, reported on August 12, occurred in RM 4 (Coalfield).

Horse owners and their veterinarians are reminded that WNV remains a risk in many parts of the province.

The following is excerpted from Saskatchewan Health’s Saskatchewan West Nile & Culex Report, August 30, 2013:

West Nile Activity Will Persist Into the September Long Weekend

West Nile Virus Risk

Although Culex tarsalis numbers have been declining in our traps, the warm evening temperatures are still causing some 2nd generation Culex tarsalis females and other species to remain active and biting. The arrival of the 2nd generation was delayed this year and was caused in part by the late spring and cool weather we encountered at the end of July. We may continue to see some more positive pools and we still have the potential to see infections going into the Labour Day long weekend. The forecasted trend to cooler temperatures next week will certainly limit mosquito activity to the warmer afternoon and early evening period. Furthermore, people will start to cover up more consistently as the evening and night-time temperatures cool off.   Fortunately the overall all level of virus cycling in birds and mosquitoes has been delayed and limited this year, and the risk of acquiring a WNV infection has been lower than in previous years.

As we enter September and early fall, people should continue to avoid getting bitten by mosquitoes, at least until we get a hard frost. There are still a few mosquitoes that will be active on warm days and evenings, including Culiseta inornata and Aedes vexans.  Although these are potential carriers of WNV, particularly in high activity years, they are not particularly competent vectors for human disease.

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