title: Distribution of hepatitis B virus genotypes in azerbaijani patients with chronic hepatitis B infection.
abstract: BACKGROUND
  Hepatitis B virus (HBV) has been classified into ten genotypes (A-J) based on genome sequence divergence, which is very important for etiological and clinical investigations. HBV genotypes have distinct geographical distributions worldwide.
  
  
  OBJECTIVE
  The aim of this study was to investigate the distribution of HBV genotypes among Azerbaijani patients with chronic hepatitis B, came from the Republic of Azerbaijan country to Iran to receive medical care.
  
  
  METHODS
  One hundred and three patients with chronic HBV infection, referred to hospitals related to Iran University of Medical Sciences and Tehran Hepatitis Center from August 2011 to July 2014, were enrolled in this cross sectional study. About 3-milliliter of peripheral blood was taken from each patient. After viral DNA extraction, HBV genotypes were tested using the INNO-LiPA™ HBV kit (Innogenetics, Ghent, Belgium). HBV genotyping was confirmed using sequencing of hepatitis B surface antigen (HBsAg) and polymerase (pol) regions of HBV.
  
  
  RESULTS
  The mean age of patients was 35.9 ± 11.7 years (19-66). Of 103 patients, 72 (69.9%) were male. In the present study, the predominant HBV genotype was D (93.2%) followed by genotype A (5.8%) and concurrent infection with A and D genotypes (0.97%).
  
  
  CONCLUSIONS
  The main and frequent HBV genotype among Azerbaijani patients with chronic hepatitis B virus infection was genotype D followed by genotype A.
authors: Department of Virology, Iran University of Medical Sciences, Tehran, IR Iran.
authors: Farah
authors: F
authors: Bokharaei-Salim
authors: Department of Virology, Iran University of Medical Sciences, Tehran, IR Iran.
authors: Hossein
authors: H
authors: Keyvani
authors: Department of Virology, Iran University of Medical Sciences, Tehran, IR Iran.
authors: Seyed Hamidreza
authors: SH
authors: Monavari
authors: Department of Virology, Iran University of Medical Sciences, Tehran, IR Iran.
authors: Maryam
authors: M
authors: Esghaei
authors: Department of Civil Engineering, Faculty of Engineering, Payame Noor University, Karaj, IR Iran.
authors: Shahin
authors: S
authors: Fakhim
authors: Department of Virology, Iran University of Medical Sciences, Tehran, IR Iran.
authors: Angila
authors: A
authors: Ataei Pirkooh
authors: Middle East Liver Diseases Center, Tehran, IR Iran ; Iran Hepatitis Network, Tehran, IR Iran.
authors: Bita
authors: B
authors: Behnava
keywords: Genotype; Hepatitis B virus; Patients