Which of the following is not a water-borne disease?

The correct answer is Itching.

Concept:

• Waterborne disease is caused by contaminated recreational or drinking water with disease-causing microbes or pathogens.

Explanation:

Itching: 

• Itching is not a water-borne disease.
• It is an irritating sensation.
• Toxins on the skin can cause itching.
• It is caused by food allergies, insect bites, pollen allergies, and medication allergies.

Typhoid:

• Typhoid is a water-borne disease.
• It spreads through contaminated food and water.
• It is caused by the pathogenic Salmonella typhi bacterium.
• It usually enters the small intestine and then migrates to other organs via the bloodstream.
• Typhoid symptoms include constant high fever, loss of appetite, headache, constipation or diarrhoea, weakness, and intestinal perforation.

Cholera:

• Cholera is a water-borne disease that causes severe watery diarrhoea that, if left untreated, can lead to dehydration and even death.
• It is caused by consuming contaminated food or water with the bacterium Vibrio cholera.
• Cholera symptoms include rapid heart rate, low blood pressure, muscle cramps.

Hepatitis:

• It is a waterborne disease.
• Hepatitis A is a liver inflammation that can range from mild to severe. 
• The hepatitis A virus (HAV) is spread through the consumption of contaminated food and water, as well as through direct contact with an infected person.

Thus, Itching is not a water-borne disease.