Hepatitis B virus genetic diversity in Argentina: Dissimilar genotype distribution in two different geographical regions; description of hepatitis B surface antigen variants

Abstract Background The hepatitis B virus (HBV) molecular epidemiological data of Argentina are still scarce, since most of the previous analyses have been performed in the Metropolitan Region. Objectives To deepen the current molecular and epidemiological information about the geographical distribu...

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Bibliographic Details
Published in:Journal of clinical virology 2008-08, Vol.42 (4), p.381-388
Main Authors: Piñeiro y Leone, Flavia G, Pezzano, Silvana C, Torres, Carolina, Rodríguez, Claudia E, Eugenia Garay, M, Fainboim, Hugo A, Remondegui, Carlos, Sorrentino, Adrián P, Mbayed, Viviana A, Campos, Rodolfo H
Format: Article
Language:English
Subjects:
Adolescent
Adult
Aged
Allergy and Immunology
Argentina
Argentina - epidemiology
Biological and medical sciences
DNA, Viral - chemistry
DNA, Viral - genetics
Female
Fundamental and applied biological sciences. Psychology
Genotype
Geography
HBsAg
HBV
Hepatitis B - epidemiology
Hepatitis B - virology
Hepatitis B Surface Antigens - genetics
Hepatitis B virus
Hepatitis B virus - classification
Hepatitis B virus - genetics
Hepatitis B virus - isolation & purification
Human viral diseases
Humans
Infectious Disease
Infectious diseases
Male
Medical sciences
Microbiology
Middle Aged
Miscellaneous
Molecular Epidemiology
Molecular Sequence Data
Phylogeny
Polymorphism, Genetic
Sequence Analysis, DNA
Sequence Homology, Amino Acid
Variants
Viral diseases
Virology
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Summary:Abstract Background The hepatitis B virus (HBV) molecular epidemiological data of Argentina are still scarce, since most of the previous analyses have been performed in the Metropolitan Region. Objectives To deepen the current molecular and epidemiological information about the geographical distribution of HBV genotypes and subgenotypes, and to describe the hepatitis B surface antigen (HBsAg) variants circulating in Argentina. Study design Eighty-eight Argentine partial HBsAg sequences from both the Northern and the Metropolitan Regions of the country were analyzed along with 67 Argentine HBV sequences existing in GenBank. Results Phylogenetic and amino acid sequence analysis grouped the 88 samples as genotypes A (14.8%), D (21.6%) and F (63.6%). In the Northern Region, 44 out of the 48 sequences analyzed (91.7%) grouped as genotype F. Differently, in the Metropolitan Region, the 40 samples grouped as genotype F (30.0%), genotype D (42.5%), and genotype A (27.5%). An elevated proportion (14.8%) of the genomes presented mutations in the major hydrophilic region (MHR). Conclusions The different genotype distribution in both Argentine regions indicates that the epidemiological landscape of HBV infection appears to be the result of the diverse human migratory movements that have given shape to the present population. Our findings show that the prevalence of HBsAg variants is quite significant among the Argentine population.
ISSN:1386-6532
1873-5967
DOI:10.1016/j.jcv.2008.01.018