Pneumonia Q 48 - Gyan Darpan : Learning Portal
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Wednesday 20 April 2022

Pneumonia Q 48

The Causative agent of Tuberculosis is said to be:
     A. Mycobacterium Tuberculosis
     B. Hansen’s Bacilli
     C. Bacillus Anthracis
     D. Group A Beta Hemolytic Streptococcus

Correct Answer: A. Mycobacterium Tuberculosis

Tuberculosis (TB) is an ancient human disease caused by Mycobacterium tuberculosis which mainly affects the lungs, making pulmonary disease the most common presentation (K Zaman, 2010). However, TB is a multi-systemic disease with a protean presentation. For a human pathogen with no known environmental reservoir, Mycobacterium tuberculosis has honed the art of survival and has persisted in human communities from antiquity through modern times.

Option B: Leprosy is a chronic infectious disease caused by Mycobacterium leprae, an acid-fast, rod-shaped bacillus. The disease mainly affects the skin, the peripheral nerves, mucosa of the upper respiratory tract, and also the eyes, apart from some other structures.
Option C: Koch proved that Bacillus anthracis that he observed in the tissue of anthrax victims was the cause of anthrax4 and crucially was transmissible. He extracted this bacterium from a sheep that had died of anthrax, then repeatedly injected generations of mice with it; the mice developed the disease. Koch announced in 1876 that he had proved this bacterium caused anthrax.
Option D: Streptococcus pyogenes, also known as group A beta-hemolytic Streptococcus, or group A strep (GAS) is a gram-positive coccus (spherical bacteria) that is ubiquitous, highly communicable, and spread primarily through person-to-person (skin-to-skin) contact and via respiratory droplets.

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