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  • Title: Inoculation of mares and very young foals with EHV-1 glycoproteins D and B reduces virus shedding following respiratory challenge with EHV-1.
    Author: Foote CE, Raidal SL, Pecenpetelovska G, Wellington JE, Whalley JM.
    Journal: Vet Immunol Immunopathol; 2006 May 15; 111(1-2):97-108. PubMed ID: 16504306.
    Abstract:
    We have previously demonstrated that intramuscular inoculation of EHV-1 glycoprotein D (gD) and glycoprotein B (gB) produced by a recombinant baculovirus and formulated with the adjuvant Iscomatrix elicited virus-neutralizing antibody and gD- and gB-specific ELISA antibody in adult horses. In this study, 14 mares and their very young foals were inoculated with a combination of baculovirus-expressed EHV-1 gD and EHV-1 gB (EHV-1 gDBr) and challenged with a respiratory strain of EHV-1. Following experimental challenge, inoculated mares and foals shed virus in nasal secretions on significantly fewer occasions compared to uninoculated mares and foals. Uninoculated foals born from inoculated mares were no more protected against experimental challenge than uninoculated foals born from uninoculated mares. The results suggest that it is indeed possible to induce partial protection in very young foals through vaccination, and while the inoculation did not prevent infection, it did reduce the frequency of viral shedding with the potential to thereby reduce the risk and prevalence of infection in a herd situation.
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