Mycobacteria tuberculosis acid fast rod, obligate aerobe, stain Ziehl-Neelsen, grows on Löwenstein-Jensen media, cord factor, intracellular growth.Tuberculosis - primary tuberculosis induces cell mediated immunity, skin test positive (+). Caseating granulomas. Secondary tuberculosis reactivation age, low immunity, stress.
Lesions erode through bronchial wallss, coughing spreads infection.
Miliary tuberculosis infection spreads throughout the body.
BCG live attenuated vaccine is not used in the U.S.