title: Japanese encephalitis: immunocytochemical studies of viral antigen and inflammatory cells in fatal cases.
abstract: The distribution of virus and the composition of the mononuclear inflammatory response were studied in the brains of 7 children who died with Japanese encephalitis. Viral antigen was localized to neurons, with greatest involvement in the thalamus and brainstem. Quantitation of perivascular inflammatory responses showed a preponderance of T cells, but only 7 to 30% of these cells were T suppressor/cytotoxic cells. Inflammatory cells invading the parenchyma were predominantly macrophages with small numbers of T cells. B cells remained localized to perivascular cuffs. Viral antigen was progressively cleared in patients with survival of 6 days or more.
mesh_terms: D000914:Antibodies, Viral / Q000134:cerebrospinal fluid; D000956:Antigens, Viral / Q000276:immunology*; D001402:B-Lymphocytes / Q000276:immunology*; D001921:Brain / Q000276:immunology / Q000473:pathology; D002648:Child; D002675:Child, Preschool; D004664:Encephalitis Virus, Japanese / Q000276:immunology; D004672:Encephalitis, Japanese / Q000276:immunology* / Q000473:pathology; D006801:Humans; D007124:Immunoenzyme Techniques; D007074:Immunoglobulin G / Q000134:cerebrospinal fluid; D007075:Immunoglobulin M / Q000134:cerebrospinal fluid; D007223:Infant; D008264:Macrophages / Q000276:immunology; D010587:Phagocytosis; D013601:T-Lymphocytes / Q000276:immunology*
chemical_list: D000914:Antibodies, Viral; D000956:Antigens, Viral; D007074:Immunoglobulin G; D007075:Immunoglobulin M