Question

Bacterium which causes tuberculosis belongs to
A. Mycobacterium
B. Corynebacterium
C. Treponema
D. Clostridium

Answer 1

Hint: Tuberculosis adversely affects lungs. Tuberculosis is curable and can be prevented. TB usually spreads from person to person through air particles. When people with lung TB cough, sneeze or spit, they spread the TB germs into the air as particles. A person needs to inhale only a few of these particles to become infected.

Complete answer:
> Opinion A: Mycobacterium-
This is a genus of Actinobacteria. Over 190 species are recognised in this genus. This genus contains pathogens which causes serious diseases in mammals, including leprosy (Mycobacterium leprae) in humans.The Greek prefix myco- means "fungus".

> Option B: Corynebacterium-
They are small, usually nonmotile, Gram-positive and they have club-like ends, pleomorphic bacilli. Because of their snapping type of division, cells often lie in clusters. Corynebacteria are chemoorganotrophic, aerobic and facultatively anaerobic, and alSo, they show a fermentative metabolism under certain conditions.

> Option C: Treponema-
It is a spiral-shaped bacteria. The major Treponema species of human pathogens is Treponema pallidum. Subspecies of this pathogen causes disease such as syphilis, bejel, and yaws. Treponema carateum is the cause of pinta. Treponema paraluis cuniculi causes syphilis in rabbits.

> Option D: Clostridium-
It is a Gram-positive bacteria. This genus has several significant human pathogens, which includes causative agents of botulism and tetanus. The genus includes an important cause of diarrhea, Clostridium difficile, which was separated after analysis of 16S rRNA.

Hence, the correct answer is option (A).

Note: Tuberculosis is caused by Mycobacterium tuberculosis. The bacteria affects the lungs very badly, but TB bacteria can attack any other body parts of the body such as the kidney, spine, and brain. Its symptoms are coughing with sputum containing blood, fever, night sweats, and weight loss.