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Full-length genomic sequence of hepatitis B virus genotype C2 isolated from a native Brazilian patient

Mónica Viviana Alvarado-Mora1, Rúbia Anita Ferraz Santana, Roberta Sitnik

  • 1Departamento de Gastroenterologia, Instituto de Medicina Tropical, Faculdade de Medicina, Universidade de São Paulo, São Paulo, SP, Brasil. monica.viviana@usp.br

Memorias Do Instituto Oswaldo Cruz
|July 9, 2011
PubMed

Insights

Hepatitis B virus (HBV) genotype C2 was sequenced in a Brazilian Caucasian patient. This finding reveals a potential new transmission route for HBV/C2 in Brazil, distinct from its usual association with Asian populations.

Area of Science:

  • Hepatology and Virology
  • Genomic Sequencing
  • Viral Evolution

Background:

  • Hepatitis B virus (HBV) causes chronic hepatitis, cirrhosis, and liver cancer.
  • In Brazil, HBV genotypes A, D, and F are most common; genotypes B and C are rare, primarily found in Asian descendants.
  • HBV/C2 has not been previously reported in non-Asian Brazilian populations.

Observation:

  • The entire genome of an HBV/C2 isolate from a Caucasian Brazilian patient was sequenced.
  • Phylogenetic analysis placed this Brazilian HBV/C2 isolate within a cluster of sequences predominantly found in China.

Findings:

  • This study reports the first complete genome sequence of HBV/C2 in a Caucasian patient in Brazil.
  • The genetic sequencing suggests an origin linked to East Asian HBV/C2 strains.
  • This indicates a potential transmission pathway of HBV/C2 into the non-Asian Brazilian population.

Implications:

  • This discovery challenges the established understanding of HBV genotype distribution in Brazil.
  • It highlights the need for enhanced surveillance of HBV genotypes, particularly in diverse ethnic groups.
  • Understanding these new transmission dynamics is crucial for effective HBV prevention and treatment strategies in Brazil.

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