Iranian Journal of Medical Sciences
Iranian Journal of Medical Sciences

Phylogenetic Comparison of Influenza Virus Isolates from Three Medical Centers in Tehran with the Vaccine Strains during 2008-2009

Document Type : Original Article(s)

Authors

Masoumeh Tavassoti Kheiri 1
Seyedeh Fahime Mousavi 2
Seyed Masoud Hosseini 3
Mojgan Taghizadeh 4
Fatemeh Fotouhi 1
Behnaz Heydarchi 1
Rouzbeh Bashar 1
Hosna Gomari 5

1 Influenza Research Lab, Pasteur Insti-tute of Iran, Tehran, Iran

2 Department. of Microbiology, Faculty of Biological Sciences, Shahid-Beheshti University, Tehran. Iran; Influenza Research Lab, Pasteur Insti-tute of Iran, Tehran, Iran

3 Department. of Microbiology, Faculty of Biological Sciences, Shahid-Beheshti University, Tehran. Iran

4 Food and Drug Control Laboratories and Research Center, Ministry of Health and Medical Education, Tehran, Iran

5 Department. of Medical Biotechnology, Pasteur Institute of Iran, Tehran, Iran

Abstract
Background: Influenza virus is a major infectious pathogen of the respiratory system causing a high degree of morbidity and mortality annually. The worldwide vaccines are decided and produced annually by World Health Organization and licensed companies based on the samples collected from all over the world. The aim of this study was to determine phylogenecity and heterogenecity of the circulating influenza isolates during 2008-2009 outbreaks in Tehran, compare them with the vaccine strains that were recommended by WHO for the same period.
Methods: Nasopharyngeal swabs (n=142) were collected from patients with influenza and influenza-like illness. Typing and subtyping of the isolates were performed using multiplex RT-PCR and phylogenetic analysis was carried out for hemagglutinin genes of the isolates.
Results: Fifty out of 142 samples were positive for influenza A virus, and no influenza B virus was detected. Phylogenetic analyses revealed that the A/H1N1 isolates were related closely to A/Brisbane/59/2007, and the A/H3N2 isolates were close to A/Brisbane/10/2007 vaccine strains.
Conclusion: The findings of the present study demonstrate that the A/H1N1 was the predominant subtype of human influenza virus among the patients studied in Tehran during 2008-2009 winter seasons. In addition, some amino acid variation was found in Tehran/2008/H1N1 isolates from the 2008-2009 vaccine strain, but the H3N2 isolates showed higher genetic resemblance to the vaccine strain.

Keywords

Influenza A Virus
hemagglutinin
influenza vaccine
sequence analysis
Iranian Journal of Medical Sciences
Volume 36, Issue 3 - Serial Number 3
17
September 2011
Pages 172-177

  • Received 27 April 2014
  • Revised 24 August 2020
  • Accepted 24 December 2018

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