Key result
All hepatitis A virus strains isolated from acutely ill patients in the Ahwaz region of Iran were identified as subgenotype IB, with extensive genetic heterogeneity among the strains.
Why the study?
What is the genetic diversity and predominant genotype of Hepatitis A virus in acutely ill patients in the Ahwaz region of Iran?
Cross-Sectional (n=59)
What is the genetic diversity and predominant genotype of Hepatitis A virus in acutely ill patients in the Ahwaz region of Iran?
Subgenotype 1b is the sole genotype of Hepatitis A virus identified in acutely ill patients in the Ahwaz region of Iran.
Subgenotype IB predominates with high heterogeneity in Ahwaz HAV cases; supports regional surveillance but leaves open broader epidemiological or vaccination implications.
Hepatitis A virus (HAV) is one of the etiologic agents of acute viral hepatitis, an important public health problem worldwide. The aim of this study was to investigate the genetic diversity of HAV in Southwest Iran (Ahwaz). A total of 59 sera were collected from acutely ill patients with anti-HAV IgM antibodies during 2009 and 2010 were tested also by RT-PCR targeting the 5' NCR for molecular diagnosis and examined in the VP1-2A and VP3-VP1 regions for genotyping. Twelve (20%) patients were detected VP1-2A by RT-PCR and 10 patients had VP3-VP1. The resulting amplicons were sequenced for genotype identification. All HAV strains were identified as subgenotype IB. Phylogenetic analysis revealed an extensive genetic heterogeneity among the strains. Seven hundred sixty-five S→F and 788 K→R amino acid substitutions in IRI49 isolate were found. It is concluded that subgenotype 1b is the sole genotype HAV in this region.
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Nejati et al. (2012) conducted a cross-sectional in Hepatitis A virus infection (n=59). Hepatitis A virus genetic diversity was evaluated on Genotype identification. All hepatitis A virus strains isolated from acutely ill patients in the Ahwaz region of Iran were identified as subgenotype IB, with extensive genetic heterogeneity among the strains.
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