Dengue Fever (cont.)
IN THIS ARTICLE
What Causes Dengue Fever, and How Is Dengue Fever Transmitted?
Four closely related viruses cause dengue fever. The viruses are transmitted from Aedes aegypti and Aedes albopictus mosquitoes to humans in a viral life cycle that requires both humans and these mosquitoes. There is no human-to-human dengue fever transmission. Once a mosquito is infected, it remains infected for its life span. A human can infect mosquitoes when the human has a high number of viruses in the blood (right before symptoms develop). The viruses belong to the Flaviviridae family and have an RNA strand as its genetic makeup. Virologists term them dengue virus types 1-4 (DENV 1-4). All four serotypes are closely related. However, there are enough antigenic differences between them that if a person becomes immune to one serotype, the person can still be infected by the other three serotypes.
What Are Dengue Fever Risk Factors?
The risk factors for dengue fever are as follows:
Medically Reviewed by a Doctor on 1/7/2016
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