Transport of<i>Cryptosporidium</i>and<i>Giardia</i>in Massachusetts Watersheds During Storm Events

Rees, Paula L.; Baker, Ronald J.; Long, Sharon C.; Barten, Paul K.

doi:10.1061/40763(178)5

Cited by 2 publications

(3 citation statements)

References 3 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…At specific sites, temporal variations in Cryptosporidium concentration may differ from variations in fecal indicator organisms seasonally (Ryu & Abbaszadegan, 2008; Lipp et al, 2001), during rainfall occurrences (Rees et al, 2005; Roser & Ashbolt, 2004; Kistemann et al, 2002), and during any day (Lemarchand & Lebaron, 2003). The variations observed in Cryptosporidium concentration and differences between Cryptosporidium and fecal indicator organism temporal variations arise from differences in sources and loadings of Cryptosporidium and indicator organisms in source waters.…”

Section: Conclusion and Recommendationsmentioning

confidence: 99%

“…Chauret and co‐workers (1995) studied the occurrence of Cryptosporidium in Canadian rivers where oocysts were routinely found (78% of samples were positive) and saw no correlation between Cryptosporidium and fecal coliforms. Studies of surface waters in central Arizona (Ryu & Abbaszadegan, 2008), surface waters in central Massachusetts (Rees et al, 2005), wastewater/water treatment plant effluent in southern France (Lemarchand & Lebaron, 2003), southern Florida estuarine waters (Lipp et al, 2001), and canals and lakes used for recreation in the Netherlands (Schets et al, 2008) have also failed to link Cryptosporidium and fecal indicators. In contrast, LeChevallier et al (1991) found a significant correlation between fecal coliform density and Cryptosporidium concentration on the basis of analysis of a database of Cryptosporidium and fecal coliform occurrence in water samples from 66 source waters in the United States.…”

Section: Conclusion and Recommendationsmentioning

confidence: 99%

See 1 more Smart Citation

Is E. Coli an appropriate surrogate for Cryptosporidium occurrence in water?

Nieminski¹,

Durrant²,

Hoyt³

et al. 2010

Journal AWWA

View full text Add to dashboard Cite

This study evaluated the validity of monitoring for Escherichia coli in lieu of Cryptosporidium to assess the vulnerability of source waters to the presence of Cryptosporidium oocysts. Over a period of seven years, four large water systems in Utah collected Cryptosporidium, E. coli, and turbidity data from seven water treatment plants that treat both reservoir and stream sources. The data represented analyses completed by two US Environmental Protection Agency‐approved protozoan laboratories and local state‐certified laboratories for E. coli. Results of the statistical analyses indicated poor correlation between Crypto sporidium and E. coli and between Cryptosporidium and turbidity in all monitored water sources throughout the entire monitoring period. The analyses indicate that elevated concentrations of E. coli are not indicative of the presence of Cryptosporidium in surface water. Both E. coli and turbidity are poor surrogates for occurrence of Cryptosporidium at treatment plant intakes. Further investigation is needed to establish appropriate surrogates for Cryptosporidium occurrence.

show abstract

Section: Conclusion and Recommendationsmentioning

confidence: 99%

Section: Conclusion and Recommendationsmentioning

confidence: 99%

Is E. Coli an appropriate surrogate for Cryptosporidium occurrence in water?

Nieminski¹,

Durrant²,

Hoyt³

et al. 2010

Journal AWWA

View full text Add to dashboard Cite

show abstract

“…These exceedences were reduced if the runoff was discharged well offshore. Jeong et al(2005) investigated the contribution of several marinas to fecal coliform impairment in Newport Bay(California) and found that dry-weather flows and urban runoff contribute to Water Environment Research, Volume 78, Number 10-Copyright © 2006 Water Environment Federation 1144 the fecal coliform impairments Rees et al (2005). evaluated the transport of Cryptosporidium and Giardia in watersheds during storm events.…”

mentioning

confidence: 99%