Transient colonization of the respiratory tract by mycobacteria in South Wales.
D005260:Female; D006801:Humans; D008297:Male; D008906:Mining; D009161:Mycobacterium / Q000302:isolation & purification; D009164:Mycobacterium Infections / Q000453:epidemiology / Q000382:microbiology*; D011009:Pneumoconiosis / Q000150:complications; D012141:Respiratory Tract Infections / Q000382:microbiology*; D013183:Sputum / Q000382:microbiology; D014374:Tuberculin Test; D014852:Wales