ABSTRACT
This study reports the first isolation and partial genetic characterization of Chikungunya virus (CHIKV) from patients during a 2006-2007 dengue-like syndrome outbreak in Gabon. The isolated viruses were phylogenetically close to strains isolated in the Democratic Republic of the Congo 7 years ago and to strains isolated more recently in Cameroon. These results indicate a continuing circulation of a genetically stable CHIKV population during 7 years in Central Africa.
Subject(s)
Alphavirus Infections/epidemiology , Alphavirus Infections/virology , Chikungunya virus/isolation & purification , Adolescent , Adult , Alphavirus Infections/diagnosis , Chikungunya virus/classification , Chikungunya virus/genetics , Child , Disease Outbreaks , Female , Gabon/epidemiology , Humans , Male , Middle Aged , PhylogenyABSTRACT
We report the isolation of chikungunya virus from a patient during an outbreak of a denguelike syndrome in Cameroon in 2006. The virus was phylogenetically grouped in the Democratic Republic of the Congo cluster, indicating a continuous circulation of a genetically similar chikungunya virus population during 6 years in Central Africa.
Subject(s)
Alphavirus Infections/genetics , Chikungunya virus/isolation & purification , Adult , Alphavirus Infections/diagnosis , Alphavirus Infections/epidemiology , Cameroon/epidemiology , Chikungunya virus/classification , Chikungunya virus/genetics , Child , Child, Preschool , Disease Outbreaks , Female , Humans , Infant , Male , Middle Aged , Phylogeny , Serologic TestsABSTRACT
We report the first laboratory-confirmed human infection with O'nyong-nyong virus in Chad. This virus was isolated from peripheral blood mononuclear cells of a patient with evidence of a seroconversion to a virus related to Chikungunya virus. Genome sequence was partly determined, and phylogenetic studies were conducted.
Subject(s)
Alphavirus Infections/epidemiology , Alphavirus Infections/virology , Alphavirus/isolation & purification , Adult , Aedes , Alphavirus/classification , Alphavirus/genetics , Animals , Cells, Cultured , Chad/epidemiology , Chlorocebus aethiops , Humans , Leukocytes, Mononuclear/virology , Male , Molecular Sequence Data , Phylogeny , Sequence Analysis, DNA , Vero CellsABSTRACT
We describe the spread of a dengue virus during an outbreak in Saint Martin island (French West Indies) during winter 2003-2004. Dengue type 3 viruses were isolated from 6 patients exhibiting clinical symptoms. This serotype had not been detected on the island during the preceding 3 years. Genome sequence determinations and analyses showed a common origin with dengue type 3 viruses isolated in Martinique 2 years earlier.
