Vieira YR, dos Santos DRL, Portilho MM, Velloso CEP, Arissawa M, Villar LM, Pinto MA, de Paula VS. Hepadnavirus detected in bile and liver samples from domestic pigs of commercial abattoirs.
BMC Microbiol 2014;
14:315. [PMID:
25495746 PMCID:
PMC4269919 DOI:
10.1186/s12866-014-0315-2]
[Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/21/2014] [Accepted: 11/26/2014] [Indexed: 01/04/2023] Open
Abstract
Background
Preliminary studies showed the prevalence of a virus similar to human hepatitis B virus (HBV-like) in swine from farms in China and the molecular evidence of Hepadnavirus infection in domestic pigs herds in Brazil. In this study, we genetically characterize the swine Hepadnavirus strains in swine from slaughterhouses located in certified abattoirs from Rio de Janeiro State, Brazil and evaluate its hepatotropic potential.
Results
Bile and liver samples from swine were positive for partial genome amplification (ORF S and ORF C), direct sequencing and viral load quantification. Sequencing of the gene encoding the surface antigen allowed classification of Hepadnavirus into genotypes, similar to HBV genotype classification. Indirect immunofluorescence confirmed the presence of HBsAg antigen in liver tissue sections.
Conclusions
So far our data suggest that commercial swine house an HBV-like virus and this relevant finding should be considered in studies on the origin and viral evolution.
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