Tuberculosis is cause by type of bacteria is called Mycobacterium tuberculosis.
Maybe it's called AFB (Acid Fast Bacilli).
Tuberculosis spread through the air from person to person.
It's can happen when someone coughs, sneezes, speaks, sings or laughs.
In most the immune system is able to destroy the bacteria. However, bacteria infect the body.
If your the immune system is weakened. You can sick from Tuberculosis infection.