Acid fast bacillus
Latent disease believed to affect >20% of world population.
Prevalence higher in developing nations and mimics HIV/AIDS distribution
Pulmonary - cavitating pneumonia, upper lobe pnuemonia, occasionally miliary
Extrapulmonary including lymph node disease, CNS infection, osteomyelitis (Potts), peritoneal and others.
Airborne precautions for pulmonary disease
Caseating granulomas on pathology
MDR includes Rifampin and Isoniazid resistance