How can I prevent mosquito-borne illnesses?

Mosquito-borne illnesses or diseases are caused by viruses, bacteria or parasites transmitted by mosquitoes. Unfortunately, mosquito-borne illnesses are found anywhere in the world that mosquitoes are (including the United States). With a few easily implemented steps, you can significantly decrease the odds of contracting a mosquito-borne illness during your visit to Costa Rica.

Common methods of prevention include:

Use insect repellent with DEET or Picaridin (natural repellents do not work).Of course, consult with your doctor first.
Mosquitoes are most active at dawn and dusk; particularly in rural and jungle areas. Close windows and doors a little before, during and after. Also keep them closed at night as lights may attract the pests.
Wear long sleeves and pants during peak mosquito hours.
Use permethrin-treated clothing. It is possible to buy pre-treated clothing or treat them yourself.
Sexual transmission of the Zika virus is possible from a male partner. If you have sex (all forms), use a condom.
When staying in beach areas and when possible, select hotels that are located on the hillside. Mosquitoes are more common on or near the beach.
Malaria is present in Costa Rica, though very rare. Medication can be obtained from your doctor before you visit. Keep in mind that thousands of people that live in or visit Costa Rica get by without it.

Dengue fever, Chikungunya and Zika virus (one confirmed case of Zika as of February 1, 2016) are present in Costa Rica, but can easily be combatted by following the methods of prevention outlined above. Seek medical attention if you develop any of the following symptoms, seek medical attention; fever, joint or muscle pain, rash, pain behind your eyes, unusual bleeding of the nose or gums, or easy bruising.

We encourage you to read this insightful article, “Scientific Perspective on Zika Virus”, authored by Ray Krueger-Koplin PhD.

You can also take comfort from the fact that the Costa Rican government has and will continue to perform mass mosquito fumigations in high risk areas. They are coordinating public clean ups and providing ample public awareness information. Costa Rica is also planning to combat the mosquitoes that carry the disease with a bacterium that is known to kill the pests, but has no effect on humans. For these and many other reasons, Costa Rica experiences far less mosquito-borne illnesses than other Central American countries.

How can I prevent mosquito-borne illnesses?

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