The hemorrhagic form of dengue fever is more severe and associated with loss of appetite, vomiting, high fever, headache, and abdominal pain. Shock and circulatory failure may occur. Untreated hemorrhagic dengue results in death in up to 50 percent of cases. Dengue fever may occur from 3 to 14 days after exposure to an infected mosquito, commonly within 5 to 7 days. Immunity may be produced to the same strain of dengue virus after repeated exposure.
Dengue fever is diagnosed by a positive antibody test.
There is no specific treatment available. Intravenous fluids and oxygen therapy are often used for patients who experience shock during their illness. Control measures are limited to advising travelers to affected areas to minimize exposure to mosquitoes. Use of protective clothing, mosquito netting, and repellents are helpful in preventing mosquito bites. For people residing outside of New York City, please contact your state or local health department.