mycobacterium tuberculosis positive in sputum smear

mycobacterium tb mtb afb positive acid fast acid-fast stain sample specimen tuberculosis bacteria bacterium bacilli bacillus sputum phlegm lab laboratory medical exam microorganism disease diagnosis research science patient analyzing test microbiology infection infectious health care hiv aids pneumonia lung cancer cough chronic epidemic immunodeficient microscope isoniazid rifampicin ethambutol treatment