cases; death Klebsiella Tarragona >99.999% Gastroenterocolitis Diarrhea and abdominal cramps E-coli >99.999% Gastroenterocolitis Diarrhea and abdominal cramps Other Cysts: Water-borne cysts such as Cryptosporidium and Giardia are very common in water supplies all over the world. These cysts are particularly worrying because: They can be found in human and animal faeces,