Zika Virus and Mosquitoes

How do people catch Zika virus?
People catch Zika virus primarily by being bitten by an infected Aedes mosquito – the same type of mosquito that spreads dengue, chikungunya and yellow fever.

What is the risk to Washington County?
Washington County Mosquito Control conducts ongoing surveillance and monitors all mosquito species within the county on a regular basis. Zika virus is known to be carried by certain species of mosquitoes. None of these species of mosquitoes has been established in Washington County or elsewhere in Oregon.

What can you do to help protect yourself when traveling?
The best protection from Zika, as well as other mosquito-borne diseases is preventing mosquito bites. Always remember the three Ds of prevention from mosquito bites:

  1. Drain: All mosquitoes require water in which to breed. Be sure to drain any standing water around your house.
  2. Dress: Wear light colored, loose fitting clothing. When practical, wear long sleeves and pants.
  3. Defend: Use mosquito repellant. Always follow the product label instructions. Four repellents that are approved and recommended by the Environmental Protection Agency are:
    • DEET (N,N-diethyl-m-toluamide)
    • Picaridin (KBR 3023)
    • Oil of lemon eucalyptus (p-methane 3,8-diol, or PMD)
    • IR3535

CDC fact sheet Mosquito Bite Prevention for the United States (English and Spanish)

For additional information
Pan American Health Organization
Centers for Disease Control and Prevention (CDC)
Oregon Health Authority


Para más información sobre el virus Zika, los países afectados, síntomas, tratamiento, riesgos, formas de transmisión y prevención, vea este video.