1887

Abstract

Summary

The neuraminidases and haemagglutinins of 20 isolates of swine influenza virus collected between 1930 and 1967 were compared in neuraminidase-inhibition and haemagglutination-inhibition serological tests. All the isolates were serologically related to a greater or lesser extent in tests with either antigen. The antigenicity of the two antigens varied independently in different isolates. There was a slight, but statistically significant, drift in the antigenicity of both antigens during the period in which the isolates were collected.

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/content/journal/jgv/10.1099/0022-1317-6-3-409
1970-03-01
2019-10-18
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http://instance.metastore.ingenta.com/content/journal/jgv/10.1099/0022-1317-6-3-409
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