Which one of the following disease is not caused by bacteria?
Answer & explanation
Correct answer: option 3
The correct answer is Option (3) → Common cold
The disease that is not caused by bacteria is Common cold. It is caused by a virus, typically a rhinovirus, not a bacterium.
The others are caused by bacteria:
- Dysentery can be caused by Shigella or Entamoeba histolytica (a protozoan, but still an infection).
- Diphtheria is caused by Corynebacterium diphtheriae.
- Plague is caused by Yersinia pestis.