Dengue outbreaks in Divinopolis, south-eastern Brazil and the geographic and climatic distribution of Aedes albopictus and Aedes aegypti in 2011-2012

Martinelle Ferreira da Rocha Taranto, José Eduardo Marques Pessanha, Michelli dos Santos, Ana Cláudia dos Santos Pereira Andrade, Vidyleison Neves Camargos, Stênio Nunes Alves, Cláudia Di Lorenzo Oliveira, Alex Gutterres Taranto, Luciana Lara dos Santos, José Carlos de Magalhães, Erna Geessien Kroon, Leandra Barcelos Figueiredo, Betânia Paiva Drumond, Jaqueline Maria Siqueira Ferreira

Research output: Contribution to journalArticlepeer-review

11 Scopus citations

Abstract

Objective: To entomologically monitor Aedes spp. and correlate the presence of these vectors with the recent epidemic of dengue in Divinopolis, Minas Gerais State, Brazil. Methods: Ovitraps were installed at 44 points in the city, covering six urban areas, from May 2011 to May 2012. After collection, the eggs were incubated until hatching. In the 4th stage of development, the larvae were classified as Ae. aegypti or Ae. albopictus. Results: In total, 25 633 Aedes spp. eggs were collected. February was the month with the highest incidence, with 5635 eggs collected and a hatching rate of 46.7%. Ae. aegypti eggs had the highest hatching rate, at 72.3%, whereas Ae. albopictus eggs had 27.7%. Climate and population density influenced the number of eggs found. Indicators of vector presence were positively correlated with the occurrence of dengue cases. Conclusion: These data reinforce the need for entomological studies, highlight the relevance of Ae. albopictus as a possible disease vector and demonstrate its adaptation. Ae. albopictus, most commonly found in forested areas, comprised a substantial proportion of the urban mosquito population.

Original languageEnglish (US)
Pages (from-to)77-88
Number of pages12
JournalTropical Medicine and International Health
Volume20
Issue number1
DOIs
StatePublished - Jan 1 2015
Externally publishedYes

Keywords

  • Aedes aegypti
  • Aedes albopictus
  • Dengue
  • Entomological index
  • Ovitraps

ASJC Scopus subject areas

  • Parasitology
  • Public Health, Environmental and Occupational Health
  • Infectious Diseases

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