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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.

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Presentation Transcript
Causative agent
Causative Agent

  • Virus

  • Infects Humans, Birds, Mosquitoes, Horses and Other Mammals


Transmission
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

Clinical Signs in Horses


Diagnosis treatment for horses
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
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
Mosquito Management

  • Source Reduction

    • Minimize mosquito breeding areas

      • Limit standing water

        • Old tires, swimming pools, rain gutters, containers that hold water


Personal protection
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
Who should I contact if WNV suspected ?

  • Animals

    • Contact your veterinarian

  • Humans

    • Contact your health care provider


For more information
For more Information

  • http://www.cfsph.iastate.edu/DiseaseInfo/index.php

  • http://www.aaep.org/pdfs/control_guidelines/West%20Nile%20Virus.pdf

  • http://www.aphis.usda.gov/vs/nahss/equine/wnv/

  • www.cdc.gov

  • www.vdh.state.va.us


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