title: Letter: Evidence for infection by two distinct strains of Myobacterium tuberculosis in pulmonary tuberculosis.
mesh_terms: D001434:Bacteriophage Typing; D006801:Humans; D009169:Mycobacterium tuberculosis / Q000302:isolation & purification*; D013183:Sputum / Q000382:microbiology; D014397:Tuberculosis, Pulmonary / Q000175:diagnosis*