What is TB?
Tuberculosis is caused by an infection with Mycobacterium tuberculosis, rod-shaped bacteria that are spread mostly through air-born droplets or dust micro-particles of dried sputum. Once inhaled, the body’s immune system typically reacts by engulfing the bacteria, forming a tubercle that contains the bacteria to help keep it from spreading. In most cases, the bacteria will die; in others, however, the bacteria can survive, become dormant, and the infected individual may develop active disease at a later date, sometimes soon after infection, sometimes years later. (more…)