Immunogenicity, security and protection against small ruminant lentivirus (SRLV) challenge in sheep, induced by intranasal immunization with a recombinant Sendai virus vector expressing SRLV gag-P25.

ABSTRACT: Small ruminant lentiviruses (SRLV) are responsible for significant economic losses in sheep and goat farming; however, effective vaccination strategies remain unavailable. This study evaluated the immunogenicity, safety, and protective efficacy of a recombinant Sendai virus vector (SeV) expressing SRLV gag-P25 (rSeV-GFP-P25) in lambs. Twenty-one SRLV-negative lambs were divided into three groups and inoculated intranasally thrice with culture medium (group 1); SeV-GFP (group 2) or rSeV-GFP-P25 (group 3). Lambs were challenged with homologous SRLV at 16 weeks post-first immunization. Clinical and hematological parameters, antibody responses, SRLV viral loads in peripheral blood mononuclear cells (PBMCs) and target tissues, histopathological and histomorphometric analyses, assisted wi

SUBMITTER: Gomez A 

PROVIDER: S-EPMC12444960 | biostudies-literature | 2025 Dec

REPOSITORIES: biostudies-literature