Detailed Instructions: Given a scientific passage and an answer, generate a question for the given answer.
Problem:Passage: This bacterium, called Mycobacterium tuberculosis , causes the disease Tuberculosis (TB). These bacteria usually attack the lungs. If left untreated, the infection can be fatal. Many other illnesses, mild and severe, are also caused by certain types of bacteria. Answer: lungs
Solution:
What part of the body does the mycobacterium tuberculosis bacterium usually attack?