Which of the following is NOT a waterborne disease?

Asthma is correctly identified as not a waterborne disease. It is primarily a chronic respiratory condition that affects the airways and is caused by various factors, including allergens, environmental pollutants, and genetic predisposition. Asthma is not transmitted through water or related to water quality; instead, it results from reactions to certain triggers in the environment, which highlights its distinction from waterborne diseases.

In contrast, cholera, hepatitis A, and amoebic dysentery are all illnesses that can be contracted through contaminated water. Cholera is a severe intestinal infection caused by ingesting food or water contaminated with the bacterium Vibrio cholerae. Hepatitis A is a viral infection that can be transmitted through consuming contaminated water, while amoebic dysentery, caused by the protozoan Entamoeba histolytica, is linked to drinking or using contaminated water sources. This means that asthma does not fit into the category of diseases caused or spread through water, confirming its status as the correct answer.