Va. Horse Owners Urged to Consider WNV, EEE, Rabies Vaccines

Animal health officials are urging horse owners talk with vets about vaccinating against WNV, EEE, and rabies.
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The Virginia Department of Agriculture and Consumer Services (VDACS) urges all horse owners to check with their veterinarians for West Nile virus (WNV), Eastern equine encephalitis (EEE), and rabies vaccination recommendations for their animals. Virginia only had one confirmed case of WNV in 2012 and no cases of EEE, although the number of horses affected in previous years and in other states was much higher. State officials are concerned that horse owners may be lulled into inaction by the lack of diseases activity last year and neglect vaccination this year.

“We still urge horse owners to consider EEE and WNV vaccination.” says Charles Broaddus, DVM, program manager for VDACS’ Office of Veterinary Services. “We never know what mosquito activity will be in any given year, although with a wet winter and spring, it could be heavy in 2013. The bottom line is these vaccines are very safe and effective. We believe that in most cases, private veterinarians will recommend them for their clients. Horse owners need to be aware that the vaccines require boosters every six to twelve months.”

Broaddus added that VDACS is also suggesting that owners check about rabies vaccinations for their horses this year. “In the past few years, we have seen similar or greater numbers of cases of rabies in horses as WNV and EEE,” he said.

Vaccines are designed to drastically reduce the incidence of WNV and EEE in horses. The vaccines are effective for six to twelve months, so horses should be revaccinated at least annually. In areas where the disease occurs frequently, most veterinarians recommend vaccination every six months. For the vaccine to be effective it must be handled and administered properly and be given at least two weeks before the horse is exposed to the virus. Additionally, to stimulate full immunity, horses must be vaccinated twice, about 30 days apart, the first year that the horse is vaccinated. Other prevention methods include removing standing water breeding sites for mosquitoes, using insect repellents, and removing animals from mosquito-infested areas during peak biting times, usually dusk to dawn

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