👉 Mycetogenous, also known as Mycobacterium tuberculosis, is a type of bacterium that causes tuberculosis (TB). TB is an infectious disease caused by a bacterium called Tuberculosis bacillus (TB). The bacteria in TB are transmitted when you or someone else inhales the spores from your lungs. TB can be fatal if left untreated and it's also one of the leading causes of death worldwide due to its long-term effects on the body.