The pathogenic microorganisms, their toxic exudates, and other contaminants together, cause serious conditions such as cholera, diarrhea, typhoid, amebiasis, hepatitis, gastroenteritis, giardiasis, campylobacteriosis, scabies, and worm infections, to name a few. Water borne diseases spread by contamination of drinking water systems with the urine and faeces of infected animal or people. ... In general, contaminated food is the single most common way in which people become infected. The germs in the faeces can cause the diseases by even slight contact and transfer.