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© Christine Schmitt, Anubis Vega Rua, Jean-Marc Panaud
Tête de moustique femelle Aedes albopictus, vecteur du virus de la dengue et du chikungunya. Microphotographie électronique à balayage, image colorisée.
Publication : Transactions of the Royal Society of Tropical Medicine and Hygiene

Aedes aegypti in Brazil: genetically differentiated populations with high susceptibility to dengue and yellow fever viruses

Scientific Fields
Diseases
Organisms
Applications
Technique

Published in Transactions of the Royal Society of Tropical Medicine and Hygiene - 01 Jan 2004

Lourenço-de-Oliveira R, Vazeille M, de Filippis AM, Failloux AB

Link to Pubmed [PMID] – 14702837

Trans. R. Soc. Trop. Med. Hyg. 2004 Jan;98(1):43-54

Aedes aegypti was eliminated from Brazil in 1955, but re-infested the country in the 1970s. Dengue outbreaks have occurred since 1981 and became endemic in several cities in Brazil after 1986. Urban yellow fever has not occurred since 1942, and only jungle yellow fever cases have been reported. A population genetic analysis using isoenzyme variation combined with an evaluation of susceptibility to both yellow fever and dengue 2 viruses was conducted among 23 A. aegypti samples from 13 Brazilian states. We demonstrated that experimental infection rates of A. aegypti for both dengue and yellow fever viruses (YFV) are high and heterogeneous, and samples collected in the endemic and transition areas of sylvatic yellow fever were highly susceptible to yellow fever virus. Boa Vista, a border city between Brazil and Venezuela, and Rio de Janeiro in the Southeast region are considered as the most important entry points for dengue dissemination. Considering the high densities of A. aegypti, and its high susceptibility to dengue and yellow fever viruses, the risk of dengue epidemics and yellow fever urbanization in Brazil is more real than ever.

http://www.ncbi.nlm.nih.gov/pubmed/14702837