Abstract
Bovine herpesvirus type 1 (BoHV-1) has distinct subtypes according to genomic characterization. Immune responses induced by BoHV-1 subtype 1 (BoHV-1.1) are not distinguishable from those induced by BoHV-1 subtype 2 (BoHV-1.2) through conventional serological methods. In the present report, an enzyme linked immunosorbent assay is described that allows discrimination between immune responses in cattle immunized with either subtype, based on a monoclonal antibody that recognizes specifically the amino-terminal region of glycoprotein C (gC) on BoHV-1.1 strains, thus not reacting with BoHV-1.2a. The test displayed a sensitivity of 92%, specificity of 90% and a good correlation with serum neutralization tests on samples from BoHV-1.1-immunized calves ( κ = 0.799). The test may be useful to provide new insights into the roles played by each of these two subtypes in the epidemiology of BoHV-1 infections.
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