11-Microbiology_Water_Mar12

New york city water sources 30

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Unformatted text preview: genic protozoa •  Entamoeba histoly;ca: amoebic dysentery. •  Giardia lamblia (à༎): giardiasis (backpacker’s disease/beaver fever), chronic diarrhea, owen associated with drinking water in wilderness areas (beavers and muskrats are frequent carriers – source of contamina<on of streams). •  Cryptosporidium parvum: chronic and accute diarrhea, self limi<ng in healthy individuals, major problem in immunocompromised individuals, no reliable treatment. Present in 90% sewage samples, 75% river waters and 28% of drinking waters. (Intracellular C. parvum à༎) 24 Brock Biology of Microorganisms, 13th Edi<on. Cysts of G. lamblia and C. parvum •  Both form cysts that are resistant to a number of disinfectants, including chlorine. •  C. parvum cysts are not effec<vely removed by the filtra<on process in water plants. G. lamb...
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