Inactivation of Cryptosporidium parvum Oocysts by ammonia

Article Abstract:

The natural production and release of free ammonia may have an impact on the viability of Cryptosporidium parvum oocysts in soil and water microhabitants. A study was conducted to determine how the survival of oocysts is affected by increased free ammonia concentrations and times of exposure. The findings indicate that the inactivation of oocysts in ammonia-containing environments may be increased by environmentally relevant concentrations of free ammonia.

Ammonia, Oocytes, Oocyte donation

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Chlorine dioxide inactivation of Cryptosporidium parvum oocysts and bacterial spore indicators

Article Abstract:

Some bacterial spores are more sensitive to chlorine dioxide than Cryptosporidium parvum and therefore should not be used as indicator organisms. In addition, oocyst purification methods may differ, as purified oocysts from three different supplies had different sensitivities to chlorine dioxide.

Evaluation, Water, Water treatment, Chlorine oxides

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Effect of high-rate algal ponds on viability of Cryptosporidium parvum oocysts

Article Abstract:

A high-rate algal pond can reduce the infectivity of Cryptosporidium parvum oocysts by 97%. These ponds are used to treat wastewater and consist of algae to provide oxygen for biodegradation and bacteria to provide nutrients for the algae.

Innovations, Water treatment plants, Constructed wetlands

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