title: Molecular evolution, distribution and genetic relationship among the dengue 2 viruses isolated from different clinical severity.
abstract: Twenty-two strains of dengue 2 virus, isolated in China, Latin America, New Guinea and Thailand were subjected to phylogenetic analysis. The UPGMA analysis was carried out on each gene region of dengue virus and demonstrated that outcome from most of the gene regions showed similar results except those from NS4B and YUTR with very short nucleotide length. Among ten regions examined, the results from E gene documented the geographical differences of the virus strains most clearly and all the American strains (Mara 4, IQT1797 and S1) were distantly related to the Asian isolates. As for the 16 Thai strains isolated in 1993, they were clustered into three groups and a strain from a DSS patient formed a distinct branch compared to the other two groups. This finding from phylogenetic analysis is consistent with earlier conclusion and support the severity related subtyping of dengue 2 virus based on amino acid changes.
authors: Department of Virology, Institute of Tropical Medicine, Nagasaki University, Japan.
authors: B D
authors: BD
authors: Pandey
authors: K
authors: K
authors: Morita
authors: F
authors: F
authors: Hasebe
authors: M C
authors: MC
authors: Parquet
authors: A
authors: A
authors: Igarashi
mesh_terms: D020413:3' Untranslated Regions; D020121:5' Untranslated Regions; D002681:China; D003715:Dengue / Q000821:virology*; D003716:Dengue Virus / Q000145:classification / Q000235:genetics* / Q000302:isolation & purification; D019143:Evolution, Molecular; D005814:Genes, Viral; D005838:Genotype; D006801:Humans; D007843:Latin America; D009512:New Guinea; D010802:Phylogeny; D013785:Thailand; D017361:Viral Nonstructural Proteins / Q000235:genetics; D015678:Viral Structural Proteins / Q000235:genetics
chemical_list: D020413:3' Untranslated Regions; D020121:5' Untranslated Regions; D017361:Viral Nonstructural Proteins; D015678:Viral Structural Proteins