High Prevalence of Hepatitis B Subgenotype D4 in Northeast Brazil: an Ancient Relic from African Continent?

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Citações na Scopus
8
Tipo de produção
article
Data de publicação
2018
Título da Revista
ISSN da Revista
Título do Volume
Editora
MEXICAN ASSOC HEPATOLOGY
Autores
COSTA-NUNES, Jomar D.
TELES-SOUSA, Marinilde
FONSECA-BARROS, Lena M.
PAIVA-FERREIRA, Adalgisa de S.
Citação
ANNALS OF HEPATOLOGY, v.17, n.1, p.54-63, 2018
Projetos de Pesquisa
Unidades Organizacionais
Fascículo
Resumo
Introduction. Hepatitis B virus (HBV) infection leads to a chronic liver disease that is distributed worldwide. The characterization of HBV into genotypes/subgenotypes is not only a mere procedure for distinguishing different HBV strains around the world because determining their geographic distribution is crucial to understanding their spread across the world. Material and methods. We characterized different HBV genotypes and subgenotypes in five municipalities located in northeastern Maranhao, in the Brazilian north Atlantic coast. 92 HBsAg-positive individuals were submitted to PCR (polymerase chain reaction). Fifty samples were sequenced using automated Sanger sequencing and classified by phylogenetic methods. Results. Subgenotypes D4 and A1 were found in 42 (84%) and eight (16%) samples, respectively. To our knowledge, this is the first study to describe a high frequency of subgenotype D4 in any population. Subgenotype A1 is frequently found across Brazil, but D4 has been rarely detected and only in a few Brazilian states. This study shows the characterization of HBV subgenotypes from a population based study in the state of Maranhao, particularly in populations that do not have frequent contact with populations from other regions of the world. Conclusion. Our findings showed a HBV subgenotype profile that probably reflect the viruses that were brought with the slave trade from Africa to Maranhao. This study also reinforces the need to evaluate the status of HBV dispersion not only in large urban centers, but also in the hinterland, to enable the implementation of effective control and treatment measures.
Palavras-chave
HBV, Genotype, Slave trade, Maranhao
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