Abstract
A secreted form of gB1 (gB1s), previously shown to protect rabbits against HSV-1 ocular infection when inoculated systemically, was delivered to rabbit periocular area to evaluate its vaccine efficacy upon local administration. The efficacy of local or systemic inoculation of a gB1s-DNA-based vaccine in the rabbit model of ocular HSV-1 infection was assessed in parallel flow. Rabbits received four inoculations of the different immunogens, then immune responses and clinical symptoms were evaluated. Both the local protein and the systemic DNA administration elicited a neutralizing antibody response, reduced ocular symptoms with respect to controls ( P<0.01), and completely prevented the death of rabbits from encephalitis. Conversely, local DNA vaccination did not induce any detectable antibody response, and could only partially protect rabbits from the development of encephalitis and severe ocular infection.
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