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J Gen Virol. 1989 Mar;70 ( Pt 3):639-45.

Evidence for at least four antigenic sites on type O foot-and-mouth disease virus involved in neutralization; identification by single and multiple site monoclonal antibody-resistant mutants.

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  • 1AFRC Institute for Animal Health, Pirbright Laboratory, Woking, Surrey U.K.


Neutralizing monoclonal antibodies raised against type O foot-and-mouth disease virus have been characterized on the basis of their reactivity with a panel of single site monoclonal antibody-resistant mutants which had defined three antigenic sites. Five antibodies neutralized all these mutants, but by selecting further single site mutants with one of these antibodies it was possible to define a fourth site involved in virus neutralization. Two monoclonal antibodies still neutralized these mutants and all multiple site resistant mutants. One multiple site resistant mutant was resistant to neutralization at each of four antigenic sites but was still efficiently neutralized by type O convalescent cattle sera. The relationship between sites recognized by different monoclonal antibodies generated in different laboratories is discussed.

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