Recognizing the Mosquito
Aedes Aegypti can be recognized by its distinctive striped markings, located on the legs.  Also, the mosquito raises its back two legs when landing or standing.

Aedes_aegyptiOnly the female mosquito bites.  The mosquito is most active from 7am to 10am and from 4 to 7 pm.

Classic Dengue Symptoms
The following symptoms will last 3 to 7 days and will generally appear 5 to 7 days after the bite.

  •     High Fever
  •     Intense muscle and joint pain
  •     Headaches, pain in the bones and behind the eyes
  •     Sometimes body rashes and itching occur
  •     Light bleeding in the nose or gums.

Hemorrhagic Dengue Symptoms

  •     High Fever (over 39° Celsius 102.2 °F) lasting 2 to 7 days
  •     Severe hemorrhaging
  •     Difficulty breathing
  •     Strong abdominal pain
  •     Frequent vomiting or diarrhea
  •     Low blood pressure
  •     Paleness, sweating and exhaustion

What to Do if you Have Symptoms

  •     See a doctor
  •     Watch for severe symptoms
  •     Don’t self medicate or use aspirin or other anti-inflammatory medication. This can provoke bleeding.
  •     Don’t use antibiotics, dengue is caused by a virus not by bacteria
  •     Drink liquids to stay hydrated

Prevention of Dengue

  • Inspect your house at least once a week for breeding areas.
  • Drain water from plant holders.
  • Bury or shred vegetation that can hold water, bamboo and cocunut shells are common in Costa Rica.
  • Fill holes in trees with sand
  • Leave empty containers face down: plant holders, bottles, buckets, etc.
  • Change water in vases every week. This will prevent any larvae from becoming adults.
  • Throw away old tires, or better yet recycle them.  If you must store tires keep them under a roof and make sure no standing water is in them.
  • Clean animal dishes once a week.
  • The water tray under the air conditioner and refrigerator should be cleaned once a week.
  • Water tanks or containers should be well sealed.
  • Trash should not be accumulated.  Perforate any cans or bottles that could accumulate water before throwing them away.
  • Pools should be treated with chlorine.
  • Rain gutters should be cleaned so water flows freely.
  • Roof tops should not collect water.
  • If you have broken glass on your wall for security, fill the bottom with sand so water can’t accumulate there.


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