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Pathogens. 2016 Aug 10;5(3). doi: 10.3390/pathogens5030055.

Retrospective Analysis of the Equine Influenza Virus A/Equine/Kirgizia/26/1974 (H7N7) Isolated in Central Asia.

Pathogens (Basel, Switzerland)

Kobey Karamendin, Aidyn Kydyrmanov, Marat Sayatov, Vitaliy Strochkov, Nurlan Sandybayev, Kulaysan Sultankulova

Affiliations

  1. Institute of Microbiology and Virology, 103 Bogenbay Batyr Str., Almaty 050010, Kazakhstan. [email protected].
  2. Institute of Microbiology and Virology, 103 Bogenbay Batyr Str., Almaty 050010, Kazakhstan. [email protected].
  3. Institute of Microbiology and Virology, 103 Bogenbay Batyr Str., Almaty 050010, Kazakhstan. [email protected].
  4. Research Institute for Biological Safety Problems, Gvardeyskiy 080409, Zhambyl Region, Kazakhstan. [email protected].
  5. Research Institute for Biological Safety Problems, Gvardeyskiy 080409, Zhambyl Region, Kazakhstan. [email protected].
  6. Research Institute for Biological Safety Problems, Gvardeyskiy 080409, Zhambyl Region, Kazakhstan. [email protected].

PMID: 27517962 PMCID: PMC5039435 DOI: 10.3390/pathogens5030055

Abstract

A retrospective phylogenetic characterization of the hemagglutinin, neuraminidase and nucleoprotein genes of equine influenza virus A/equine/Kirgizia/26/1974 (H7N7) which caused an outbreak in Kirgizia (a former Soviet Union republic, now Kyrgyzstan) in 1977 was conducted. It was defined that it was closely related to the strain London/1973 isolated in Europe and it shared a maximum nucleotide sequence identity at 99% with it. This Central Asian equine influenza virus isolate did not have any specific genetic signatures and can be considered as an epizootic strain of 1974 that spread in Europe. The absence of antibodies to this subtype EI virus (EIV) in recent research confirms its disappearance as of the 1990s when the antibodies were last found in unvaccinated horses.

Keywords: Central Asia; H7N7; equine influenza; phylogeny; sequence

Conflict of interest statement

The authors declare that they have no competing interests.

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