Typhoid is a waterborne disease and is caused by water contaminated by which of the following?

Typhoid is a bacterial disease caused by contamination of water with the bacterium Salmonella typhi.

A virus causes waterborne illnesses like hepatitis A, but not typhoid.

Fungi are not the agents behind typhoid infection.

A protozoan causes diseases such as amoebiasis and giardiasis, not typhoid.

Salmonella typhi spreads through water and food soiled by infected human waste.

Safe water, sanitation and vaccination are the main defences against typhoid.