Dengue Fever

If you have questions about Dengue Fever, call Hawaii 211:


If you would like to report a possible case, contact:

Disease Investigation Branch: 808-586-4586

If you have questions or concerns about mosquitoes, contact Vector Control:
On the Big Island:
  East Hawaii: 808-974-6001 or
  West Hawaii: 808-322-4880
Oahu: 808-586-8021
Maui: 808-873-3560
Kauai: 808-241-3306

Click HERE for information on the 2015/2016 Hawaii outbreak

About Dengue Fever

Dengue fever is a viral illness spread by mosquitoes.(Go here for more information on other mosquito-borne diseases) The disease occurs mainly in tropical Asia, Africa, the Caribbean and the South Pacific. It is most common during the rainy season in areas infested with infected mosquitoes. Sometimes, persons arriving from other countries may enter the United States with dengue fever and infect local mosquitoes, as happened in Hawaii in 2001.

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The dengue virus is spread through the bite of infected Aedes mosquitoes. Dengue is not spread directly from one person to another.

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Signs and Symptoms

The symptoms of dengue fever include sudden onset of fever, severe headaches, eye, joint, and muscle pain, and rash. The rash typically appears on the hands, arms, legs and feet 3 to 4 days after the fever begins. Minor bleeding problems can also occur. The symptoms usually go away completely within 1 to 2 weeks. Sometimes, people with dengue fever have blood clotting problems. When this happens, the illness is called dengue hemorrhagic fever. Dengue hemorrhagic fever is a very serious illness with abnormal bleeding and very low blood pressure (shock).

The symptoms usually start 5 to 6 days after being bitten by infected mosquitoes, but the onset can range from 2 to 15 days.

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There is no specific treatment for dengue fever. Bed rest and acetaminophen (Tylenol) to treat fever and pain are recommended. Aspirin and NSAIDS (ibuprofen, naproxen) are not recommended as they can make bleeding problems worse. There is currently no vaccine for dengue fever.

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Even if you get dengue fever once, you can get it again. There are four major types of dengue viruses. Having dengue fever with one type of dengue virus will not protect you from the other three types.

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  • When traveling to areas that have dengue fever, try to avoid exposure to mosquitoes. Aedes mosquitoes are usually most active in the early morning hours after daybreak, in the late afternoon before dark, and any time during the day when indoors or in shady areas.
  • Use mosquito netting over beds, and screens on windows and doorways.
  • Use mosquito repellents and wear appropriate clothing such as long-sleeved shirts and long pants that reduce exposure to mosquito bites.
  • Mosquitoes are drawn to dark colors; so if possible, wear white or light colored clothing when you are likely to be exposed to biting mosquitoes.

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