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Dengue outbreaks in Divinopolis, south‐eastern Brazil and the geographic and climatic distribution of Aedes albopictus and Aedes aegypti in 2011–2012
Author(s) -
Rocha Taranto Martinelle Ferreira,
Pessanha José Eduardo Marques,
Santos Michelli,
Santos Pereira Andrade Ana Cláudia,
Camargos Vidyleison Neves,
Alves Stênio Nunes,
Di Lorenzo Oliveira Cláudia,
Taranto Alex Gutterres,
Santos Luciana Lara,
Magalhães José Carlos,
Kroon Erna Geessien,
Figueiredo Leandra Barcelos,
Drumond Betânia Paiva,
Ferreira Jaqueline Maria Siqueira
Publication year - 2015
Publication title -
tropical medicine and international health
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.056
H-Index - 114
eISSN - 1365-3156
pISSN - 1360-2276
DOI - 10.1111/tmi.12402
Subject(s) - aedes albopictus , dengue fever , aedes aegypti , hatching , outbreak , vector (molecular biology) , larva , biology , population , veterinary medicine , aedes , geography , ecology , demography , virology , medicine , biochemistry , sociology , gene , recombinant dna
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.