title: Antigen detection in chest infections.
mesh_terms: D000942:Antigens, Bacterial / Q000302:isolation & purification*; D003378:Counterimmunoelectrophoresis; D006801:Humans; D011018:Pneumonia, Pneumococcal / Q000175:diagnosis / Q000276:immunology* / Q000382:microbiology; D013296:Streptococcus pneumoniae / Q000276:immunology*
chemical_list: D000942:Antigens, Bacterial