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Related Concept Videos

Hepatitis01:25

Hepatitis

63
Hepatitis is an inflammatory condition of the liver most commonly caused by hepatotropic viruses (A–E), though non-infectious causes such as alcohol and drugs also exist.Hepatitis AHepatitis A virus (HAV) is a non-enveloped RNA virus of the Picornaviridae family. It is primarily transmitted via the fecal-oral route, typically through ingestion of contaminated food or water. After ingestion, HAV enters the bloodstream through the oropharynx or intestinal epithelium and reaches the liver.
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HBV genotypic variability in Cuba.

Carmen L Loureiro1, Julio C Aguilar2, Jorge Aguiar2

  • 1Laboratorio de Virología Molecular, Centro de Microbiología y Biología Ceular, Instituto Venezolano de Investigaciones Científicas, Caracas, Venezuela.

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|March 6, 2015
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Summary
This summary is machine-generated.

Hepatitis B virus (HBV) genetic diversity in Cuba reflects population admixture, with genotype A being most common, followed by genotype D. These findings correlate with the island's European and African genetic heritage.

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Area of Science:

  • Virology
  • Genetics
  • Epidemiology

Background:

  • Hepatitis B virus (HBV) genetic diversity often mirrors human population admixture.
  • Understanding HBV genotypic distribution is crucial for public health and treatment strategies.

Purpose of the Study:

  • To investigate the genotypic diversity of HBV isolates in Cuba.
  • To correlate HBV genotypes with the genetic background of the Cuban population.

Main Methods:

  • Sequencing of the S genomic region of Cuban HBV isolates.
  • Analysis of complete genome or precore-core sequences for selected isolates.
  • Phylogenetic analysis to determine HBV genotypes and subgenotypes.

Main Results:

  • Genotype A was the most frequent (67%), predominantly A2, followed by genotype D (31%) with diverse subgenotypes (D1-D7).
  • Genotypes E, H, and B3 were also identified, suggesting recent introductions.
  • Precore region mutations were more prevalent in genotype D than in genotype A.

Conclusions:

  • The HBV genotypic distribution in Cuba aligns with the predominantly European and African ancestry of its population.
  • HBV genotypes E, B3, and H may represent more recent introductions into the island.