1887

Abstract

SUMMARY

Cross-reactions between two strains of foot-and-mouth disease virus (FMDV) belonging to different serotypes (A and O) were studied with intact virus and virus subunits and antisera produced against the isolated structural proteins. Anti-VP type O serum showed cross-reactive neutralizing activity, in contrast to the sera raised against intact virus type O, whereas anti-VP type A serum only neutralized homologous virus. Anti-VP, VP and VP did not show neutralizing activity. In the enzyme-linked immunosorbent assay and radio-immunoassay anti-VP, -VP and -VP sera reacted with the 12S virus subunits of both serotypes. No activity was obtained against VP. Competition experiments with virus subunits of virus type A and O show that anti-VP serum is the most type-specific. Anti-VP serum is completely cross-reactive, while anti-VP serum reacted in an intermediate way. The identical reactions obtained with anti-VP sera and the homologous and heterologous virus subunits suggest that the exposed VP antigens are identical.

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1980-11-01
2021-10-25
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