Concept

Cyclospora cayetanensis

Related publications (8)

Safely Managed Hygiene: A Risk-Based Assessment of Handwashing Water Quality

Sustainable Development Goal (SDG) Indicator 6.2.1 requires household handwashing facilities to have soap and water, but there are no guidelines for handwashing water quality. In contrast, drinking water quality guidelines are defined: water must be "free ...

AMER CHEMICAL SOC2019

Uncertainty in prediction of disinfection performance

Urs von Gunten

Predicting the disinfection performance of a full-scale reactor in drinking water treatment is associated with considerable uncertainty. In view of quantitative risk analysis, this study assesses the uncertainty involved in predicting inactivation of Crypt ...

2007

Implications of sequential use of UV and ozone for drinking water quality

Urs von Gunten, Silvio Canonica

The formation of bromate levels exceeding the drinking water standard of 10 mu g L-1 may impose the reduction of ozone doses used in the treatment of drinking water. This paper illustrates the procedure of evaluating the use of reduced ozone doses while im ...

2006

Simultaneous prediction of Cryptosporidium parvum oocyst inactivation and bromate formation during ozonation of synthetic waters

Urs von Gunten, Ji Hyun Kim

A model was developed to simultaneously assess Cryptosporidium parvum oocyst inactivation and bromate formation during ozonation of synthetic solutions in batch and flow-through reactors. The model incorporated 65 elementary chemical reactions involved in ...

2004

Ozonation of drinking water: Part II. Disinfection and by-product formation in presence of bromide, iodide or chlorine

Urs von Gunten

Ozone is an excellent disinfectant and can even be used to inactivate microorganisms such as protozoa which are very resistant to conventional disinfectants. Proper rate constants for the inactivation of microorganisms are only available for six species (E ...

2003

Prediction of the disinfection and oxidation efficiency of full-scale ozone reactors

Urs von Gunten

The efficiency of a two-step ozonation with regard to disinfection and oxidation of micropollutants; was assessed for a river-water treatment plant (Limmat River, Zurich, Switzerland). The assessment was based on laboratory experiments to estimate transien ...

2003

Inactivation of Bacillus subtilis spores and formation of bromate during ozonation

Urs von Gunten

Inactivation of B. subtilis spores with ozone was investigated to assess the effect of pH and temperature, to compare the kinetics to those for the inactivation of C. parvum oocysts, to investigate bromate formation under 2-log inactivation conditions, and ...

2001

Induction, maintenance, and reinduction of tumoricidal activity in bone marrow-derived mononuclear phagocytes by Corynebacterium parvum. Evidence for the involvement of a T cell- and interferon-gamma-independent pathway of macrophage activation

Michel Aguet

Rat bone marrow-derived mononuclear phagocytes, virtually homogeneous with respect to the cell lineage, do not exhibit spontaneous tumoricidal activity in the resting state. When incubated with macrophage-activating lymphokines, rat recombinant interferon- ...

1987

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