Cryptosporidium monitoring system at a water treatment plant, based on waterborne risk assessment

The water volume required for daily monitoring of Cryptosporidium (which can statistically ensure an annual risk of infection below 10(-4)), was assessed by evaluating the applicability of the Poisson lognormal (PLN) distribution in microbial risk assessment. PLN showed as good a fit to the observed...

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Veröffentlicht in:Water science and technology : a journal of the International Association on Water Pollution Research. - 1986. - 50(2004), 1 vom: 12., Seite 293-9
1. Verfasser: Masago, Y (VerfasserIn)
Weitere Verfasser: Oguma, K, Katayama, H, Hirata, T, Ohgaki, S
Format: Aufsatz
Sprache:English
Veröffentlicht: 2004
Zugriff auf das übergeordnete Werk:Water science and technology : a journal of the International Association on Water Pollution Research
Schlagworte:Journal Article Research Support, Non-U.S. Gov't
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520 |a The water volume required for daily monitoring of Cryptosporidium (which can statistically ensure an annual risk of infection below 10(-4)), was assessed by evaluating the applicability of the Poisson lognormal (PLN) distribution in microbial risk assessment. PLN showed as good a fit to the observed data as to the negative binomial distribution. From the estimated PLN distributions for the source and finished water, the efficacy of the oocyst removal by the conventional water treatment process was estimated to follow log-normal distribution (median = 3.16 log10, 95% CI = 4.27-2.05 log10). The 365 consecutive negative results of daily monitoring for 180 L of finished water were found to be statistically equivalent to the annual risk of infection below 10(-4). This research also suggested the possibility of applying a qualitative detection method, such as CC-PCR, as a routine monitoring method for the quantitative risk management 
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650 4 |a Research Support, Non-U.S. Gov't 
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700 1 |a Katayama, H  |e verfasserin  |4 aut 
700 1 |a Hirata, T  |e verfasserin  |4 aut 
700 1 |a Ohgaki, S  |e verfasserin  |4 aut 
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