Pulmonary tuberculosis is a disease that affects the lungs and is caused by bacteria called Mycobacterium tuberculosis. It spreads through the air when people who are sick with pulmonary TB expel bacteria into the air, such as by coughing or sneezing. The document appears to be a presentation about pulmonary tuberculosis given by Mr. Akram Khan, an assistant professor and head of department at Shree Sahjanand Institute of Nursing in Bhavnagar.