Dengue Virus

on 15.9.05 with 0 comments

Group: Group IV ((+)ssRNA)
Family: Flaviviridae
Genus: Flavivirus
Species: Dengue virus

  • Dengue (DF) and dengue hemorrhagic fever (DHF) are caused by one of four closely related, but antigenically distinct, virus serotypes (DEN-1, DEN-2, DEN-3, and DEN-4), of the genus Flavivirus.
  • Infection with one serotype does not protect a person against infection with another.
  • Aedes aegypti, a domestic, day-biting mosquito that prefers to feed on humans, is the most common Aedes species.(Unlike the mosquitoes that cause malaria, dengue mosquitoes bite during the day.)
  • Dengue viruses occur in most tropical areas of the world.
  • Dengue is most common in cities but can be found in rural areas.
  • Incubation Period: averages 4 to 6 days, with a range of 3 to 14 days.


Serology and PCR (polymerase chain reaction) studies are available to confirm the diagnosis of dengue if clinically indicated.

Category: Microbiology Notes



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