Abstract
A sequential antigenic variant of the A/Texas/77 (H3N2) influenza virus was obtained in vitro using a monoclonal antibody against the haemagglutinin (HA) of the antigenic variant V18 previously selected in vitro from the parental Texas virus. The sequential antigenic variant, designated DV1, the V18 antigenic variant and the parental A/Texas/77 viruses were used to evaluate the frequency of anti-haemagglutinin antibodies in human sera in single radial haemolysis assays. Twenty six of 100 children's sera, which contained antibodies to the parental A/Texas/77 virus, failed to react with the V18 antigenic variant. A higher proportion of sera (42%) failed to react with the DV1 antigenic variant with alterations in two different antigenic determinants with respect to the parental virus. The results are discussed in relation to the mechanism of antigenic drift and to the in vivo reaction of antigenic variants selected in vitro.
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Natali, A., Chezzi, C. Use of monoclonal anti-haemagglutinin antibodies for the “In vitro” selection of a sequential influenza virus antigenic variant. Eur J Epidemiol 7, 384–388 (1991). https://doi.org/10.1007/BF00145004
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DOI: https://doi.org/10.1007/BF00145004