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[dengue and its vectors in brazil].history of dengue in brazil is covered from the first citations in the xixth century to the great outbreaks of the last ten years. den-1 and den-4 viruses have been isolated for the first time in 1982 during an epidemic in boa vista, roraima state. in 1986-1987, epidemics of dengue type 1 covered an extended area from rio de janeiro/sào paulo states to the north east states of brazil. during 1990-1991, dengue type 2 epidemics have been notified in the south east (rio de janeiro/são paulo) and in ...19968924771
[yellow fever epidemiology in brazil].we have carried out a meticulous time-space-analysis of the incidence of yellow fever in humans in brazil from 1954 to 1972 and especially from 1973 to 1999. this study has added to our knowledge of the epidemiology of yellow fever and enabled us to redefine epidemiological zones and determine their geographical limits. the endemic area is located within the amazon basin; here cases are scattered and generally limited in number. however, there are also "foci of endemic emergence" within this are ...200111681224
aedes aegypti in brazil: genetically differentiated populations with high susceptibility to dengue and yellow fever viruses.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 ...200414702837
early determination of the reproductive number for vector-borne diseases: the case of dengue in brazil.to evaluate a new method of deriving the reproductive number for vector-borne diseases from the early epidemic curves for vector-borne diseases with incubations in the vectors and in the hosts.200616553913
dengue virus in aedes aegypti larvae and infestation dynamics in roraima, brazil.to detect the presence of dengue virus in larval forms of aedes aegypti and to associate vector presence with rainfall and incidence of disease.200819031506
seasonal dynamics of aedes aegypti (diptera: culicidae) in the northernmost state of brazil: a likely port-of-entry for dengue virus 4.roraima is the northernmost state of brazil, bordering both venezuela and guyana. appropriate climate and vector conditions for dengue transmission together with its proximity to countries where all four dengue serotypes circulate make this state, particularly the capital boa vista, strategically important for dengue surveillance in brazil. nonetheless, few studies have addressed the population dynamics of aedes aegypti in boa vista. in this study, we report temporal and spatial variations in ae ...200919722086
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