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Type A influenza (H2N2) viruses isolated in Leningrad in 1980

Published online by Cambridge University Press:  19 October 2009

D. B. Golubev ,
G. I. Karpukhin ,
S. S. Galitarov  and
G. M. Denisov
D. B. Golubev
Affiliation:
All-Union Influenza Research Institute of the Ministry of Public Health, Prof. Popov Str. 15/17, Leningrad, USSR
G. I. Karpukhin
Affiliation:
All-Union Influenza Research Institute of the Ministry of Public Health, Prof. Popov Str. 15/17, Leningrad, USSR
S. S. Galitarov
Affiliation:
All-Union Influenza Research Institute of the Ministry of Public Health, Prof. Popov Str. 15/17, Leningrad, USSR
G. M. Denisov
Affiliation:
All-Union Influenza Research Institute of the Ministry of Public Health, Prof. Popov Str. 15/17, Leningrad, USSR
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Summary

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In April-May 1980, two independent outbreaks of influenza-like illness occurred in Leningrad among children's-home children aged from 3 months to 2 years (of 68 children under observation, 50 became ill) and among boarding-school pupils aged 15–17 years (of 50 pupils under observation, 13 became ill).

A total of five influenza A virus strains were derived from one clinically healthy and three affected children of the children's home. Similar viruses were obtained from one affected boarding-school pupil and from an infected woman aged 24 years (a sporadic case within a household). On the basis of laboratory findings, all these seven strains were identified as influenza A H2N2 subtype strains.

Six of the affected children showed significant seroconversion only to H2 haemagglutinin from February to May 1980. Type A influenza H2N2 virus was isolated from three persons, including the sporadic case, who also showed significant seroconversion to H2 haemagglutinin. H2N2 influenza A virus was isolated on two occasions, at a 7-day interval, from the girl N. Ju.

Laboratory findings obtained from the study of the viruses isolated using up-to-date immunological and molecular-biochemical techniques enable us to conclude the following. The A/Leningrad/80 isolates belong to H2N2 sero-subtype. The viruses isolated are similar but not identical to the A/Singapore/I/57 reference strain in details of polypeptide and gene composition.

Type
Research Article
Information
Journal of Hygiene , Volume 95 , Issue 2 , October 1985 , pp. 493 - 504
Copyright
Copyright © Cambridge University Press 1985

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