Natural waterbourne transmission of cryptosporidiosis was studied by a simulation using low-level accxamulative dosing. Gnotobiotic lambs were fed on a diet artificially contaminated to a predetermined level with Cryptosporidium parvum oocysts and the faecal output of cysts was measured. Results indicate a minimum infectious dose as low as one oocysts.

Cryptosporidium parvum, gnotobiotic lambs, infective dose size, oocysts, transmission
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© International Association on Water Quality 1993
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