Acid fast bacillus.
Latent disease is believed to affect >20% of world population.
Prevalence is higher in developing nations and mimics HIV/AIDS distribution. The greatest risk factor for progression of latent infection to active TB is HIV infection.
Upper lobe pneumonia
Lymph node disease
Airborne precautions for pulmonary disease.
Caseating granulomas on pathology.
MDR includes rifampin and isoniazid resistance.