%0 Journal Article %T Simultaneous circulation of all four dengue serotypes in Manaus, State of Amazonas, Brazil in 2011 %A Bastos %A Michele de Souza %A Figueiredo %A Regina Maria Pinto de %A Ramasawmy %A Rajendranath %A Itapirema %A Evaulino %A Gimaque %A Jo£żo Bosco Lima %A Santos %A Lucilaide Oliveira %A Figueiredo %A Luiz Tadeu Moraes %A Mour£żo %A Maria Paula Gomes %J Revista da Sociedade Brasileira de Medicina Tropical %D 2012 %I Sociedade Brasileira de Medicina Tropical - SBMT %R 10.1590/S0037-86822012000300022 %X introduction: manaus, the capital city of the state of amazon with nearly 2 million inhabitants, is located in the middle of the amazon rain forest and has suffered dengue outbreaks since 1998. methods: in this study, blood samples were investigated using reverse transcriptase-polymerase chain reaction (rt-pcr), aimed at identifying dengue virus serotypes. results: acute phase sera from 432 patients were tested for the presence of dengue virus. out of the 432 patients, 137 (31.3%) were found to be positive. all the four dengue virus serotypes were observed. conclusions: the simultaneous circulation of the four dengue serotypes is described for the first time in manaus and in brazil. %K dengue %K reverse transcriptase-polymerase chain reaction %K serotypes. %U http://www.scielo.br/scielo.php?script=sci_abstract&pid=S0037-86822012000300022&lng=en&nrm=iso&tlng=en