Abstract
Tuberculosis is one of the most contagious diseases. Although it has been present for over 5000 years, it is still one of the most significant public health problems. Tuberculosis is defined as a disease caused by a bacterium called Mycobacterium tuberculosis. Its incidence has increased and decreased over time, but it has always been a constant threat to public health. In the 1940’s some medicines were discovered to treat tuberculosis, so it slowly began to decrease. But then countries let their guard down, tuberculosis was neglected and so cases increased.