gious diseases such as tuberculosis. Poorly supervised treatment of tuberculosis also led to an increase in drug-resistant strains of the bacteria that cause tuberculosis, furthering the spread of the disease. Renewed emphasis on control and prevention has brought the incidence of tuberculosis to record low levels.Tuberculosis in the Lungs Lung tissue calcification, resulting from pulmonary tuberculosis, appears as yellow patches within the chest area of this human X ray. When airborne phlegm contaminated with the bacillus Mycobacterium tuberculosis is inhaled, nodular lesions, called tubercles, may form in the lungs and spread through the nearest lymph node.German scientist Robert Koch at work in his laboratory. Considered the founder of modern medical bacteriology, Koch isolated the bacillus that causes tuberculosis in 1882. He won the Nobel Prize for physiology or medicine in 1905....
