Waterborne	Causative	Source of Organism in
Diseases	Organism	Water	Symptom(s)
Gastroenteritis	Rotavirus	Human feces	Acute diarrhea or vomiting
	Salmonella	Animal or human feces	Acute diarrhea and vomiting
	(bacterium)
	Enteropathogenic	Human feces	Acute diarrhea or vomiting
	E. Coli
Typhoid	Salmonella, typhosa	Human feces	Inflamed intestine, enlarged spleen, high temperature— sometimes fatal
	(bacterium)
Dysentery	Shigella	Human feces	Diarrhea—rarely fatal
	(bacterium)
Cholera	Vibrio comma	Human feces	Vomiting, severe diarrhea, rapid dehydration, mineral loss—high mortality
	(bacterium)
Infectious hepatitis	Hepatitis A	Human feces, shellfish grown in polluted waters	Yellowed skin, enlarged liver, abdominal pain—low mortality, lasts up to 4 months
	(virus)
Amoebic dysentery	Entamoeba	Human feces	Mild diarrhea, chronic dysentery
	histolytica
	(protozoan)
Giardiasis	Giardia lamblia	Animal of human feces	Diarrhea, cramps, nausea, and general weakness—not fatal, lasts 1 week to 30 weeks
	(protozoan)
Cryptosporidiosis	Cryptosporidium	Animal or human feces	Diarrhea, stomach pain—lasts an average of 5 days
	(protozoan)