Question

Bacteria which causes the disease by tissue damage is

• A. Tetanus bacteria
• B. TB-bacteria
• C. Typhoid bacteria
• D. Cholera bacteria

Answer 1

The correct option is B TB-bacteria

Tuberculosis (TB) is a bacterial disease cased by Mycobacterium tuberculosis. Though TB typically attacks the lungs, it can also target the kidney, spine and brain. Once the bacteria is spread, Mycobacterium tuberculosis grows in the throat and lungs after two to eight weeks after infection. It then can either be fought off entirely by the immune system, remain in the body in a latent state, or develop into active TB. If it is active TB, it can then become skeletal TB, genital tract TB, urinary tract TB, CNS TB, gastrointestinal TB, adrenal TB or cardiac TB. The tissue damage results from the lymphoid cells releasing toxic substances rather than from bacterial toxins. The bacteria actually cause macrophages to form granulomas. These granulomas can liquefy and cause bacteria to spill into the lungs to cause large cavities to form active TB. The bacteria breed in the cavities. Thus, the tissue destruction results from cell-mediated hypersensitivity.

Therefore, the correct answer is option B.