1.   However, the lungs can become infected as a complication, a disease known as pneumonic plague, and pneumonic plague is highly contagious.

2.   TB is caused by a bacterium that spreads through the air and infects the lungs.

3.   TB, caused by a bacterium, can infect any organ of the body, but most often infects the lungs.

4.   There is evidence that the Pseudomonas aeruginosa bacteria, which infect the lungs of cystic fibrosis patients, eventually causing lung failure and death, form biofilms.

5.   To produce a spore small enough to infect the lungs took great skill.

6.   Tuberculosis is a potentially life-threatening disease that typically infects the lungs.

7.   A hallmark of TB is that after people inhale the bacteria and their lungs become infected, the immune system walls it off but cannot kill it.

8.   The lungs get infected by plague bacteria, causing pneumonia.