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01.05.2008 | Original Article

Phylogeny and molecular genetic parameters of different stages of hepatitis B virus infection in patients from the Brazilian Amazon

verfasst von: Cíntia Mara de Oliveira, Izeni Pires Farias, José Carlos Ferraz da Fonseca, Leila Melo Brasil, Rita de Souza, Spartaco Astolfi-Filho

Erschienen in: Archives of Virology | Ausgabe 5/2008

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Abstract

A fragment of 600 bp of the gene which codes for the surface antigen of hepatitis B virus (HBV) was amplified and sequenced from patients who were born in five states of the Brazilian Amazon (Amazonas, Pará, Acre, Rondônia and Tocantins). A total of 44 sequences were used for the estimation of molecular genetic parameters and phylogenetic analyses. Compared with patients who were asymptomatic, those who had acute hepatitis and chronic liver disease had higher levels of genetic variability and higher rates of nucleotide substitutions. The analysis of transition and transversion substitutions showed that transition-type substitutions predominated. In chronic liver disease carriers, transversion-type substitutions showed phylogenetic saturation. In general, all of the analyses carried out in this study showed an association between patterns of changes in molecular genetic parameters and the stage of disease progression. Phylogenetic analysis using the HKY85 model of evolution identified 41 individuals as genotype A, suggesting its predominance in the Amazon region, one individual as genotype C, and one individual closely related to genotypes E and F.

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Titel: Phylogeny and molecular genetic parameters of different stages of hepatitis B virus infection in patients from the Brazilian Amazon
verfasst von: Cíntia Mara de Oliveira
Izeni Pires Farias
José Carlos Ferraz da Fonseca
Leila Melo Brasil
Rita de Souza
Spartaco Astolfi-Filho
Publikationsdatum: 01.05.2008
Verlag: Springer Vienna
Erschienen in: Archives of Virology / Ausgabe 5/2008
Print ISSN: 0304-8608
Elektronische ISSN: 1432-8798
DOI: https://doi.org/10.1007/s00705-008-0053-6

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