Causes of Dengue fever


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Cause of Dengue fever: Virus caught from mosquitoes bites (Aedes aegypti or Aedes albopictus mosquitoes).

Cause of Dengue fever: People get dengue virus infections from the bite of an infected Aedes mosquito. Mosquitoes become infected when they bite infected humans, and later transmit infection to other people they bite. The two main species of mosquito, Aedes aegypti and Aedes albopictus, have been responsible for all cases of dengue transmitted in this country. 1

Dengue is primarily a disease of the tropics, and the viruses that cause it are maintained in a cycle that involves humans and Aedes aegypti, a domestic, day-biting mosquito that prefers to feed on humans2

Cause details for Dengue fever: Aedes albopictus is a maintenance (occasionally epidemic) vector of dengue viruses in parts of Asia and is a competent vector of several other viruses under experimental conditions. Since the discovery of Ae. albopictus in the United States, five arboviruses (eastern equine encephalomyelitis, keystone, Tensaw, Cache Valley, and Potosi) have been isolated from this mosquito. Of these five viruses, only eastern equine encephalomyelitis and Cache Valley viruses are known to cause disease in humans. 3

All flaviviruses (e.g., West Nile [shown here], St. Louis encephalitis, dengue, Japanese encephalitis, tick-borne encephalitis, yellow fever, etc.) share a common size (40-60nm), symmetry (enveloped, icosahedral nucleocapsid), nucleic acid (positive-sense, single stranded RNA approximately 10,000-11,000 bases), and appearance in the electron microscope. Therefore, images of West Nile virus are representative for this group of viruses. 4

Dengue fever as a complication: Other conditions that might have Dengue fever as a complication might be potential underlying causes of Dengue fever. The list of conditions listing Dengue fever as a complication in our database includes:

Related information for causes of Dengue fever: Further relevant information on causes of Dengue fever may be found in the risk factors for Dengue fever and underlying causes of Dengue fever.

Footnotes:
1. excerpt from Dengue Fever: NIAID
2. excerpt from CDC Dengue Fever Home Page: DVBID
3. excerpt from Information on Aedes albopictus: DVBID
4. excerpt from West Nile Virus Virology: DVBID

Last revision: May 27, 2003

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