title: Cell-mediated immunity to Chlamydia pneumoniae measured as lymphocyte blast transformation in vitro.
abstract: The purpose of the present study was to analyze Chlamydia pneumoniae-induced, antigen-specific, cell-mediated immunity. Peripheral blood mononuclear cells of four persons infected with C. pneumoniae Kajaani 6 and 17 healthy volunteers were stimulated with antigen composed of whole elementary bodies of C. pneumoniae Kajaani 6 (CP-Ag). Definitive antigen-specific lymphoproliferation (LP) responses were developed after recent infection. The LP responses of healthy people to CP-Ag varied considerably. There was no clear correlation between LP responses to CP-Ag and those to an antigen prepared from Chlamydia trachomatis serotype L2 (r > or = 0.50, P < 0.1). A larger study is required to demonstrate whether the LP responses to CP-Ag can be used for the diagnosis of C. pneumoniae infection.
authors: National Public Health Institute, Oulu, Finland.
authors: H M
authors: HM
authors: Surcel
authors: H
authors: H
authors: Syrjälä
authors: M
authors: M
authors: Leinonen
authors: P
authors: P
authors: Saikku
authors: E
authors: E
authors: Herva
mesh_terms: D000328:Adult; D000907:Antibodies, Bacterial / Q000276:immunology; D000942:Antigens, Bacterial / Q000276:immunology; D002690:Chlamydia Infections / Q000276:immunology*; D016993:Chlamydophila pneumoniae / Q000276:immunology*; D005260:Female; D006801:Humans; D007074:Immunoglobulin G / Q000276:immunology; D008213:Lymphocyte Activation; D008297:Male; D011014:Pneumonia / Q000276:immunology*
chemical_list: D000907:Antibodies, Bacterial; D000942:Antigens, Bacterial; D007074:Immunoglobulin G