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Journal of General Virology, Vol 78, 45-51, Copyright © 1997 by Society for General Microbiology
ARTICLES |
X de Lamballerie, RN Charrel, H Attoui and P De Micco
Laboratoire de Virologie, Faculte de Medecine, Hopital de la Timone,Marseille, France. virophdm@lac.gulliver.fr
The phylogenetic status of recently described isolates of hepatitis C virus (HCV) from Vietnam, Thailand and Indonesia (previously classified as types 7, 8, 9, 10 and 11) was re-analysed by the neighbour-joining method instead of the unweighted pair-group method with arithmetic mean (UPGMA) that was first used by the discoverers of these strains. The analysis of complete amino acid sequences and of nucleotide sequences of the envelope 1 (672 nt) and nonstructural 5B (1092 nt) genomic regions permitted the re-assignment of the type 7, 8, 9 and 1 1 isolates to type 6, and that of type 10 strains to type 3. Finally, this study made possible the classification of the previously described HCV strains (including these South-East Asian isolates) in six major types and at least 30 subtypes. It confirms that analysis of the E 1 and NS5B genomic regions using the neighbour-joining method is a reliable tool for the assignment of most new isolates.
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