Abstract
Polyvalent and monoclonal antibodies were used to demonstrate serological and antigenic relationships between feline herpesvirus type 1 (FHV-1) and canine herpesvirus (CHV). Using virus neutralization tests, enzyme-linked immunosorbent and indirect immunofluorescence assays, and immunoblotting analysis, reciprocal cross-reactivities to the heterologous virus were observed with some polyvalent and monoclonal antibodies. One monoclonal antibody against CHV neutralized FHV-1 infectivity and one monoclonal antibody against FHV-1 inhibited the hemagglutination activity of CHV as well as FHV-1-infected mouse serum. The major cross-reacting proteins were identified as the 143/108 kDa and 60 kDa glycoproteins of FHV-1 and the 145/112 kDa and 41 kDa glycoproteins of CHV. Previously, we have identified the 60 kDa and 41 kDa glycoproteins as the hemagglutinins of FHV-1 and CHV, respectively. The present results indicated the presence of shared antigenic determinants among these proteins.
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