Dengue situation in Brazil by year 2000

Abstract. We conducted a population genetic analysis of Aedes albopictus collected from 20 sites in Brazil, the United States (Florida, Georgia, and Illinois), and the Cayman Islands. Using isoenzyme analysis, we examined genetic diversity and patterns of gene flow. High genetic differentiation was found among Brazilian samples, and between them and North American samples. Regression analysis of genetic differentiation according to geographic distances indicated that Ae. albopictus samples from Florida were genetically isolated by distance. Infection rates with dengue and yellow fever viruses showed greater differences between two Brazilian samples than between the two North American samples or between a Brazilian sample and a North American sample. Introductions and establishments of new Ae. albopictus populations in the Americas are still in progress, shaping population genetic composition and potentially modifying both dengue and yellow fever transmission patterns.

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“…albopictus in virus transmission in nature remains to be confirmed. 41 However, dengue viruses have been isolated from larvae of Ae. albopictus.…”

Section: Discussionmentioning

confidence: 99%

Large Genetic Differentiation and Low Variation in Vector Competence for Dengue and Yellow Fever Viruses of Aedes Albopictus From Brazil, the United States, and the Cayman Islands

Oliveira¹,

Vazeille²,

Filippis³

et al. 2003

The American Journal of Tropical Medicine and Hygiene

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“…However, the PAHO vector control program was discontinued in the 1960s and, consequently, Ae. aegypti re-infested all countries from which it was supposed to have been eliminated (Schatzmayr 2000), once again becoming a health concern. The genetic variability of Ae.…”

mentioning

confidence: 99%

Genetic variability of Aedes aegypti in the Americas using a mitochondrial gene: evidence of multiple introductions

Bracco

Capurro

Lourenço‐de‐Oliveira

et al. 2007

Mem. Inst. Oswaldo Cruz

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“…The expansion continued during the 1980s and 1990s (Gubler, 2002). In Brazil, dengue cases represent 80% of all cases occurring in the Americas (Schatzmayr, 2000). In 2002, 794.219 dengue cases were registered, with 2.714 cases of the severe form of the disease (HF), which caused 150 deaths (FUNASA 2003).…”

mentioning

confidence: 99%

Genetic variability in geographical populations of Aedes aegypti (Diptera, Culicidae) in Brazil elucidated by molecular markers

2006

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The tropical mosquito, Aedes aegypti is the most important domestic vector of urban yellow fever and dengue. Genetic population studies on this vector are important because they may lead to new tools for surveillance. An analysis of genetic structure was conducted among populations of A. aegypti from 11 localities in four demographic regions within six Brazilian federal states. Markers included 21 random amplified polymorphic DNA (RAPD) loci. RAPD markers were detected among populations and cluster analysis revealed two main groups. We found high genetic polymorphism (H S = 0.224) and high levels of genetic differentiation between populations from different states (G ST = 0.430), as well as in populations from cities in the same state (G ST = 0.410). These results indicate significant differentiation in A. aegypti populations in Brazil. Regression analyses of geographic distances and pairwise F ST values estimated from RAPD markers showed that there is a correlation between genetic structure and geographic localization.

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Dengue situation in Brazil by year 2000

Abstract: Dengue virus types 1 and 2 have been isolated in Brazil by the Department of Virology, Instituto Oswaldo Cruz, in 1986 and 1990 respectively, after

Cited by 71 publications

References 9 publications

Large Genetic Differentiation and Low Variation in Vector Competence for Dengue and Yellow Fever Viruses of Aedes Albopictus From Brazil, the United States, and the Cayman Islands

Large Genetic Differentiation and Low Variation in Vector Competence for Dengue and Yellow Fever Viruses of Aedes Albopictus From Brazil, the United States, and the Cayman Islands

Genetic variability of Aedes aegypti in the Americas using a mitochondrial gene: evidence of multiple introductions

Genetic variability in geographical populations of Aedes aegypti (Diptera, Culicidae) in Brazil elucidated by molecular markers

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