tuberculosis is an infectious disease caused by
myobacterium tuberculosis, a rod-shaped aerobic bacterium that is resistant to destruction it can presist in necrotic & calcified lesions for prolonged periods & remain capable of reinstating growth
how does tuberculosis spread
organism spread by inhaling droplet nuclei circulating in air, overcrowded living conditions will increase risk of tuberculosis spread
tuberculosis acts by
host mounts a delayed type cell mediated immune response