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J Gen Virol ; 90(Pt 11): 2638-2643, 2009 Nov.
Artigo em Inglês | MEDLINE | ID: mdl-19605587

RESUMO

The genotypes of hepatitis B (HBV) and delta (HDV) viruses circulating among fulminant hepatitis cases from the western Amazon Basin of Brazil were characterized in this study. HBV and HDV isolates were obtained from liver samples from 14 patients who developed fulminant hepatitis and died during 1978-1989. HBV DNA and HDV RNA were detected in all samples. Phylogenetic analyses of HDV sequences showed that they all clustered with previously characterized sequences of HDV genotype 3 (HDV-3). HBV genotypes F, A and D were found in 50.0, 28.6 and 21.4 % of cases, respectively. These results confirm the predominance of HDV-3 in South America and its association with the severe form of hepatitis, and the finding of the co-infection of HDV-3 with different genotypes of HBV suggests that the association between HDV-3 and HBV-F is not necessarily causally related to a more severe clinical course of infection.


Assuntos
Surtos de Doenças , Vírus da Hepatite B/classificação , Hepatite B/epidemiologia , Hepatite D/epidemiologia , Vírus Delta da Hepatite/classificação , Brasil/epidemiologia , Análise por Conglomerados , DNA Viral/genética , Genótipo , Hepatite B/virologia , Vírus da Hepatite B/genética , Vírus da Hepatite B/isolamento & purificação , Hepatite D/virologia , Vírus Delta da Hepatite/genética , Vírus Delta da Hepatite/isolamento & purificação , Humanos , Fígado/virologia , Dados de Sequência Molecular , Filogenia , RNA Viral/genética , Análise de Sequência de DNA
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