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SHORT COMUNICATION - Dengue Viruses Activity in Piauí, Brazil José Adail Fonseca de Castro; Hélida Monteiro de Andrade; Semiramis Jamil Hadad do Monte; Adalberto Socorro da Silva; Karlla Celma Batista Lima Gomes; Leila Fernandes de Brito e Amaral; Flávio de Oliveira Cipriano; Juciane Vaz do Rego; Marcos Antônio da Mota Araújo; Symonara Karina Medeiros Faustino; Rita Maria Ribeiro Nogueira; Hermann Gonçalves Schatzmayr & Marize Pereira Miagostovich Abstract The present paper reports a laboratory investigation performed between the years of 2000 and 2002 to stydy a virological surveillance program introduced in the state of Piauí to support an epidemiological survey of the disease. Dengue virus type 3 (DENV-3) existence in the state was detected in May 2002 when a high number of dengue cases due to DENV-1 and DENV-2 were reported. An assessment on the population knowledge about the disease and its transmission showed that almost 50% of the population were still unaware of the epidemiological features of dengue. Keywords dengue viruses - Piauí - Brazil

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