Diversity and composition of dengue virus type 2 in Venezuela

Epidemiol Infect. 2013 Sep;141(9):1816-22. doi: 10.1017/S0950268812002324. Epub 2012 Oct 31.

Abstract

Dengue is a mosquito-borne disease caused by four closely related dengue virus (genus Flavivirus)serotypes (DENV-1–4). The clinical outcomes vary from mild febrile illness to life-threatening haemorrhagic manifestations. DENVs are endemic in the tropics and subtropics globally and currently no specific treatment or vaccines are available. In Venezuela, the American-Asian genotype of DENV-2 is the most prevalent and has been associated with severe disease outcomes.We aimed to follow-up the molecular epidemiology of DENV-2 in Venezuela to investigate if the evolution of the virus has remained the same throughout time or if the same dynamics documented in Brazil (hyperendemic co-circulation) also occurred. The results show that whereas the epidemiology of DENV in several endemic areas is characterized by serotype replacements through time, in Venezuela the American-Asian genotype DENV-2 has evolved into several genetic lineages and has remained in hyperendemic co-circulation with the other serotypes.

MeSH terms

  • Adolescent
  • Adult
  • Aged, 80 and over
  • Child
  • Child, Preschool
  • Cluster Analysis
  • Dengue / epidemiology*
  • Dengue / virology*
  • Dengue Virus / classification*
  • Dengue Virus / genetics*
  • Dengue Virus / isolation & purification
  • Female
  • Genetic Variation*
  • Genotype
  • Humans
  • Male
  • Middle Aged
  • Molecular Epidemiology
  • Molecular Sequence Data
  • Phylogeny
  • RNA, Viral / genetics
  • Reverse Transcriptase Polymerase Chain Reaction
  • Sequence Analysis, DNA
  • Sequence Homology
  • Venezuela / epidemiology
  • Young Adult

Substances

  • RNA, Viral

Associated data

  • GENBANK/HM210461
  • GENBANK/HM210462
  • GENBANK/HM210463
  • GENBANK/HM210464
  • GENBANK/HM210465
  • GENBANK/HM210466
  • GENBANK/HM210467
  • GENBANK/HM210468
  • GENBANK/HM210469
  • GENBANK/HM210470
  • GENBANK/HM210471
  • GENBANK/HM210472
  • GENBANK/HM210473
  • GENBANK/HM210474
  • GENBANK/HM210475
  • GENBANK/HM210476
  • GENBANK/HM210477
  • GENBANK/HM210478
  • GENBANK/HM210479
  • GENBANK/HM210480
  • GENBANK/HM210481
  • GENBANK/HM210482
  • GENBANK/HM210483