title: Dengue virus type 4 in Niterói, Rio de Janeiro: the role of molecular techniques in laboratory diagnosis and entomological surveillance.
abstract: In Niterói, state of Rio de Janeiro, dengue virus type 4 (DENV-4) was isolated for the first time in March 2011. We analysed the laboratory findings of the first cases and evaluated the use of molecular techniques for the detection of DENV-4 in Aedes aegypti that were field-caught. Conventional reverse transcriptase-polymerase chain reaction (RT-PCR) and Simplexa™ Dengue real-time RT-PCR confirmed DENV-4 infection in all cases. Additionally, DENV-4 was confirmed in a female Ae. aegypti with 1.08 x 10(3) copies/mL of virus, as determined by quantitative real-time RT-PCR. This is the first time the Simplexa™ Dengue real-time assay has been used for the classification of cases of infection and for entomological investigations. The use of these molecular techniques was shown to be important for the surveillance of dengue in humans and vectors.
authors.affiliation: Laboratório de Trasmissores de Hematozoários, Instituto Oswaldo Cruz, Fioruz, Rio de Janeiro, Brasil.
authors.forename: Márcia Gonçalves de
authors.initials: MG
authors.lastname: Castro
authors.forename: Rita Maria Ribeiro
authors.initials: RM
authors.lastname: Nogueira
authors.forename: Ana Maria Bispo de
authors.initials: AM
authors.lastname: Filippis
authors.forename: Anielly Alves
authors.initials: AA
authors.lastname: Ferreira
authors.forename: Monique da Rocha Queiroz
authors.initials: Mda R
authors.lastname: Lima
authors.forename: Nieli Rodrigues da Costa
authors.initials: NR
authors.lastname: Faria
authors.forename: Fernanda de Bruycker
authors.initials: Fde B
authors.lastname: Nogueira
authors.forename: Jaqueline Bastos Santos
authors.initials: JB
authors.lastname: Simões
authors.forename: Priscila Conrado Guerra
authors.initials: PC
authors.lastname: Nunes
authors.forename: Simone Alves
authors.initials: SA
authors.lastname: Sampaio
authors.forename: Ricardo
authors.initials: R
authors.lastname: Lourenço-de-Oliveira
authors.forename: Flávia Barreto dos
authors.initials: FB
authors.lastname: Santos
mesh_terms: D000330:Aedes / Q000821:virology*; D000818:Animals; D001938:Brazil; D003715:Dengue / Q000821:virology*; D003716:Dengue Virus / Q000235:genetics* / Q000302:isolation & purification; D005260:Female; D006801:Humans; D007303:Insect Vectors / Q000821:virology*; D008297:Male; D020133:Reverse Transcriptase Polymerase Chain Reaction