title: Subpopulation of peripheral blood lymphocytes in human encephalitis caused by group B arboviruses (Dengue, West Nile and Japanese B encephalitis.
abstract: Sera from twenty patients with clinically diagnosed viral encephalitis were studied during the acute and convalescent phases of illness for evidence of group B arboviral infection by demonstrating a rise in the titre of haemagglutination inhibiting (HI) antibodies. The immune status of these individuals was studied by quantitating peripheral T, T and 'null' lymphocytes. The percentage of total T cells in arboviral encephalitic (AE) group decreased significantly while that of B cells and 'active' T cells remained unaltered when compared to that of normal individuals. The null cell percentage, on the other hand increased significantly in the AE group. The absolute number of circulating T and B cells did not alter in the AE group while that of null cells rose significantly. The percentage and concentration of T. B and null cells during the convalescent phase of AE did not differ significantly when compared to those of the acute phase.
mesh_terms: D000208:Acute Disease; D000293:Adolescent; D000328:Adult; D000956:Antigens, Viral / Q000302:isolation & purification; D001102:Arbovirus Infections / Q000150:complications* / Q000276:immunology; D001402:B-Lymphocytes / Q000276:immunology; D004660:Encephalitis / Q000097:blood* / Q000209:etiology / Q000276:immunology; D004672:Encephalitis, Japanese / Q000097:blood* / Q000209:etiology / Q000276:immunology; D006801:Humans; D007958:Leukocyte Count; D008214:Lymphocytes / Q000276:immunology*; D012397:Rosette Formation; D013601:T-Lymphocytes / Q000276:immunology
chemical_list: D000956:Antigens, Viral