Causative Agent Virus Infects Humans, Birds, Mosquitoes, Horses and Other Mammals

Transmission Birds are the reservoir host Mosquitoes become infected when they feed on infected birds Mosquitoes can then transmit the virus to humans and other animals when they bite

Clinical Signs in Horses Paralysis of lips, facial muscles or tongue Blindness Drowsiness Muscle and skin twitching Hyperesthesia Altered mentation Seizures Weakness, ataxia Recumbency Trouble getting up Sound sensitive

Diagnosis & Treatment for Horses Clinical signs consistent with the disease Serology (blood test) Post-mortem examination (necropsy) if horse deceased Symptomatic and supportive treatment by licensed veterinarian Treatment is potentially costly and affected animals may die despite treatment

Prevention West Nile Virus Vaccine – Killed product – 2 doses 3-6 weeks apart – Annual or Semi-Annual Booster Specific vaccination strategy should be sought from your local equine veterinarian Vaccination is a highly effective and relatively inexpensive way to prevent this potentially deadly disease

Mosquito Management Source Reduction – Minimize mosquito breeding areas Limit standing water – Old tires, swimming pools, rain gutters, containers that hold water

Personal Protection Limit time outside during periods of mosquito activity Use mosquito repellant Wear long sleeves and pants when outdoors Make sure window screens are intact Consult health care provider for additional information

Who should I contact if WNV suspected ? Animals – Contact your veterinarian Humans – Contact your health care provider

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