title: Serological studies in Chlamydia trachomatis associated pneumonia of infants.
abstract: Serological results provided evidence for the clinical diagnosis of chlamydial pneumonia in 8 out of 51 cases. Elevated chlamydia-specific IgM titres (128-2048) and IgG titres (128-2048) were recorded in 5 and 8 infants, respectively. High titres of chlamydial antibodies (512-8192) in the sera of mothers of seropositive children proved genital Chlamydia trachomatis infection.
mesh_terms: D000907:Antibodies, Bacterial / Q000032:analysis*; D000942:Antigens, Bacterial / Q000032:analysis; D002690:Chlamydia Infections / Q000175:diagnosis* / Q000276:immunology; D002692:Chlamydia trachomatis / Q000276:immunology* / Q000302:isolation & purification; D005455:Fluorescent Antibody Technique; D006801:Humans; D007074:Immunoglobulin G / Q000032:analysis; D007075:Immunoglobulin M / Q000032:analysis; D007223:Infant; D007231:Infant, Newborn; D011014:Pneumonia / Q000175:diagnosis* / Q000276:immunology
chemical_list: D000907:Antibodies, Bacterial; D000942:Antigens, Bacterial; D007074:Immunoglobulin G; D007075:Immunoglobulin M