title: Host defence mechanisms against Japanese encephalitis virus infection in mice.
abstract: The role of antibody and cell-mediated immunity in the resistance to Japanese encephalitis virus (JEV) infection was studied in adult mice. Passively transferred antibodies obtained up to 2 weeks after primary infection protected the recipient mice against a challenge infection with JEV. Antibody obtained at 4 or 5 weeks failed to protect despite the presence of high titres of neutralizing antibody. Protection was abrogated by pretreatment of the early serum with 2-mercaptoethanol to remove IgM. Similarly, adoptive transfer of immune spleen cells obtained up to 2 weeks after immunization provided protection. The protective effect was abolished by pretreatment of the immune spleen cells with anti-Thy 1.2 antiserum and complement. These findings suggest a role of T lymphocytes and IgM antibody in recovery from JEV infection.
mesh_terms: D000818:Animals; D000914:Antibodies, Viral / Q000276:immunology; D000917:Antibody Formation; D001402:B-Lymphocytes / Q000276:immunology; D004672:Encephalitis, Japanese / Q000276:immunology*; D007111:Immunity, Cellular; D007116:Immunization, Passive; D007075:Immunoglobulin M / Q000276:immunology; D051379:Mice; D013154:Spleen / Q000276:immunology; D013601:T-Lymphocytes / Q000276:immunology
chemical_list: D000914:Antibodies, Viral; D007075:Immunoglobulin M