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[Profile of influenza viruses in Poland 1986-1990]

K Zgorzelska1

  • 1Zakład Wirusologii Państwowego, Zakøadu Higieny, Warszawie.

Przeglad Epidemiologiczny
|January 1, 1990
PubMed

Insights

Between 1986 and 1990, 69 influenza virus strains were identified, including A(H3N2), A(H1N1), and B types. These circulating strains showed genetic similarity to previously identified reference strains.

Area of Science:

  • Virology
  • Epidemiology

Background:

  • Influenza viruses constantly evolve, necessitating ongoing surveillance to track circulating strains.
  • Understanding the genetic relatedness of newly isolated strains to reference strains is crucial for vaccine development and public health strategies.

Purpose of the Study:

  • To characterize the influenza virus strains isolated in a specific region between 1986 and 1990.
  • To compare the genetic profiles of these isolated strains with established reference strains.

Main Methods:

  • Isolation and identification of influenza virus strains from clinical samples.
  • Hemagglutinin (HA) and Neuraminidase (NA) gene sequencing or antigenic characterization to determine subtype and similarity to reference strains.

Main Results:

  • A total of 69 influenza virus strains were isolated: 43 A(H3N2), 22 A(H1N1), and 4 B strains.
  • Influenza A(H3N2) isolates from 1986, 1988-1990 were antigenically similar to A/Mississippi 1/85, A/Inverness 3491/85, A/Sichuan 2/87, and A/OMS 5389/88.
  • Influenza A(H1N1) isolates from 1987 and 1989 were similar to A/Taiwan 1/86 and A/Singapore 6/86.
  • Influenza B isolates from 1988 were similar to B/Victoria 2/87 and B/Beijing 1/87.

Conclusions:

  • The circulating influenza strains during 1986-1990 exhibited genetic and antigenic similarities to established reference strains.
  • This surveillance data provides insights into influenza virus evolution and antigenic drift during the study period.

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