Question

Water polluted by various human activities causes a number of water-borne diseases. Which of the following is not a waterborne disease?

• A. Cholera
• B. Typhoid
• C. Asthma
• D. Dysentry

Answer 1

The correct option is C

Asthma

The correct option is C:

Explanation of the correct option:

1. Asthma is an air-borne disease while all other cholera, dysentery, and typhoid are water-borne.
2. Asthma is due to allergy in the patients toward foreign allergens like pollens, dust particles, etc. present in the air.
3. It causes the constriction of the bronchi and excess production of mucus causing difficulty in breathing.

Explanation of the incorrect options:

Option A: Cholera is a water-borne disease caused by the bacterium Vibrio cholerae.

Option B: Typhoid is a water-borne disease caused by the bacterium Salmonella typhii.

Option D: Dysentery is a protozoan infection caused by infected water contaminated with Entamoeba histolytica.

Final Answer: Asthma is not a waterborne disease.