Evidence of vertical transmission and co-circulation of chikungunya and dengue viruses in field populations of Aedes aegypti (L.) from Guerrero, Mexico

Trans R Soc Trop Med Hyg. 2016 Feb;110(2):141-4. doi: 10.1093/trstmh/trv106. Epub 2015 Dec 28.

Abstract

Background: We report results of the entomo-virological surveillance system in Aedes aegypti local populations performed by the Ministry of Health of Guerrero.

Methods: Indoor-adult Ae. aegypti collected at Acapulco, Zihuatanejo, Coyuca de Benitez and Atoyac de Alvarez (dry season, 2015) were processed for dengue virus (DENV) and chikungunya virus (CHIKV) using RT-PCR.

Results: We identified different seroptypes of DENV (2, 3 and 4), CHIKV and their co-circulation in field-caught mosquitoes across a significant geographic area. Pools of males were positive for CHIKV and DENV 3 and 4 suggesting vertical transmission.

Conclusions: Entomo-virological surveillance in Guerrero has identified early circulation of CHIKV and DENV and provided a trigger for timely and focalized vector control actions.

Keywords: Aedes aegypti; Chikungunya; Dengue; Mexico; Surveillance.

Publication types

  • Observational Study
  • Research Support, Non-U.S. Gov't

MeSH terms

  • Aedes / virology
  • Animals
  • Chikungunya Fever / epidemiology
  • Chikungunya Fever / genetics
  • Chikungunya Fever / transmission*
  • Chikungunya virus / genetics
  • Chikungunya virus / isolation & purification*
  • Cross-Sectional Studies
  • Dengue / epidemiology
  • Dengue / genetics
  • Dengue / transmission*
  • Dengue Virus / genetics
  • Dengue Virus / isolation & purification*
  • Humans
  • Infectious Disease Transmission, Vertical / statistics & numerical data*
  • Insect Vectors
  • Mexico / epidemiology
  • Real-Time Polymerase Chain Reaction
  • Sentinel Surveillance