Which of the following diseases is not caused by bacteria?
Answer & explanation
Correct answer: option 2
The correct answer is Option (2) → Polio
Polio (poliomyelitis) is caused by a virus, the poliovirus. It spreads mainly through contaminated food and water, can attack the nervous system and cause paralysis, and is prevented by the polio vaccine (the oral drops and the injection).
The other three diseases are bacterial:
Option (1) Tuberculosis (TB) — caused by the bacterium Mycobacterium tuberculosis; it mainly affects the lungs
Option (3) Cholera — caused by the bacterium Vibrio cholerae, through contaminated water; it causes severe diarrhoea
Option (4) Typhoid — caused by the bacterium Salmonella typhi, through contaminated food and water