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Revista argentina de microbiología

versión impresa ISSN 0325-7541versión On-line ISSN 1851-7617


FUENTEALBA, Nadia A et al. Immunoprotective response induced by recombinant glycoprotein D in the BALB/c respiratory mouse model " of Equid alphaherpesvirus 1 infection. Rev. argent. microbiol. [online]. 2019, vol.51, n.2, pp.119-129. ISSN 0325-7541.

Equid alphaherpesvirus 1 (EHV-1) infection causes abortion, respiratory disease, perinatal deaths and neurological disorders in horses. The natural infection and available vaccines provide only partial and short-lived protection against reinfections. In the present study, we analyzed the ability of purified baculovirus-expressed glycoprotein D (gD) administered by different routes to induce protective immunity in BALB/c mice after challenge with the EHV-1 AR8 strain. Clinical signs varied among the different groups of mice immunized by parenteral routes, and, although gD induced a specific serum IgG response, it did not prevent the virus from reaching the lungs. Intranasally immunized mice showed no clinical signs, and virus isolation from lungs, histological lesions and antigen detection by immunohistochemistry were negative. In addition, by this route, gD did not stimulate the production of serum IgG and IgA. However, a specific IgA response in the respiratory tract was confirmed in intranasally immunized mice. Thus, we conclude that the mucosal immune response could reduce the initial viral attachment and prevent the virus from reaching the lungs. Our findings provide additional data to further study new immunization strategies in the natural host.

Palabras clave : Equid alphaherpesvirus 1; Glycoprotein D; Mouse respiratory model.

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