We read with interest the editorial on the correlation between hepatitis B virus (HBV) genotypes and outcome of HBV infection by Fung and Lok.1 This article made a succinct outline of the epidemiology of HBV genotypes and their association with hepatitis B e antigen seroconversion, activity of liver disease, and response to treatment. We believe that this article will be helpful to hepatologist...

BACKGROUND Hepatitis B virus (HBV) has been classified in eight genotypes, from A to H (HBV/A to HBV/H). HBV genotypes were determined in two groups with different risk factors. METHODS Group I consisted of 42 patients with chronic and acute hepatitis and group II with 25 men who have sex with men (MSM). HBV genotypes were determined by DNA sequencing of the S-gene. RESULTS Both groups diff...

The clinical significance of hepatitis B virus (HBV) genotypes is still under debate. The aims of this study were to assess the distribution of HBV genotypes in France and to identify the associations between HBV genotypes and patient demographics, severity of liver disease and HBeAg status in patients referred to tertiary care centres. This was a French, multicentre, retrospective study on 262...

BACKGROUND Hepatitis B virus (HBV) infection is a major global health burden with distinct geographic public health significance. Oman is a country with intermediate HBV carrier prevalence; however, little is known about the incidence of HBV variants in circulation. We investigated the HBV genotype distribution, the occurrence of antiviral resistance, and HBV surface antigen (HBsAg) escape muta...

HBV genotypes were investigated in sera/plasma from 97 HBV positive subjects. Genotype D was revealed in 80.4% followed by E in 6.2%. Genotypes A, B, and C were also found, as well as for the first time a new combination of HBV D and G genotypes. In a cohort of subjects of this population, the relationship with lamivudine and/or famciclovir-resistant HBV mutants was also investigated. Among 12 ...

BACKGROUND Hepatitis B virus (HBV) is an etiological agent of acute and chronic liver disease existing throughout the world. The high genetic variability of HBV genome is reflected by eight genotypes (A to H), and each genotype has characteristic geographical distribution, which is important epidemiologically. Previous studies from the province of Sindh, Pakistan, have reported that genotypes A...

In 1988, it was reported that the full nucleotide sequences of 18 hepatitis B virus (HBV) strains clustered into four genetic groups (A to D) with more than 8% divergence between the groups. This classification of strains in terms of genome sequence has since proven to be an important tool in the understanding of HBV epidemiology and evolution and has been expanded to include three more genotyp...

Hepatitis B virus (HBV) genotypes E to J are understudied genotypes. Genotype is found almost exclusively in West Africa. Genotypes F and H America rare other parts of the world. The distribution genotype G not completely known. I Asia probably result from recombination events with number reported sequences for HBV small compared genotypes, which could impact phylogenetic pairwise distance anal...

OBJECTIVE The prevalence and distribution of hepatitis B virus (HBV) genotypes in Canada is not known. Genotypic analysis may contribute to a better understanding of HBV strain distribution and transmission risk. METHODS HBV surface antigen (HBsAg) positive samples of acute (n = 152) and chronic (n = 1533) HBV submitted for strain analysis or reference genotype testing between 2006 and 2012 w...

BACKGROUND Hepatitis B virus (HBV) has been classified into ten genotypes (A-J) based on genome sequence divergence, which is very important for etiological and clinical investigations. HBV genotypes have distinct geographical distributions worldwide. OBJECTIVES The aim of this study was to investigate the distribution of HBV genotypes among Azerbaijani patients with chronic hepatitis B, came...