The effects of ozone and storage temperature on the survival of Giardia lamblia cysts, the cause of human giardiasis, and Giardia muris , a parasite of mice, were compared. The viabilities of the cysts were similar over a period of 25 days of storage in the range of ‐6° to 37°C; the optimum temperature for their long‐term survival was determined to be about 5°C. Ozone was extremely effective for inactivating cysts of both Giardia species, with G. muris being consistently more resistant than G. lamblia at pH 7 and 5°C and 25°C.
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Wickramanayake et al. (1985) studied this question.
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