Assessment of the risk of infection by Cryptosporidium and Giardia in non-potable reclaimed water

H. Ryu, Absar Alum, K. D. Mena, Morteza Abbaszadegan

Research output: Chapter in Book/Report/Conference proceedingChapter

30 Citations (Scopus)

Abstract

Quantitative risk assessment for Cryptosporidium oocysts and Giardia cysts was performed to determine the public health significance of non-potable use of tertiary treated reclaimed water. Seven reclaimed water treatment plants in the southwestern United States participated in this study. The average public exposure to oocysts and cysts was estimated, based on concentrations, recovery efficiency, viability and three exposure scenarios. The exponential dose-response model was chosen to determine the probability of infection from ingestion of various numbers of oocysts and cysts. The risks of infection for Giardia were approximately one or two orders of magnitude higher than those for Cryptosporidium. The combined risks of infection from oocysts and cysts at sites using a combination of chlorination and UV disinfection would meet the annual acceptable risk of 1.00E-04, whereas those at the other utilities using only chlorination indicated higher probability of infection than the 1.00E-04 resulting from accidental consumption of a small amount of non-potable reclaimed water.

Original languageEnglish (US)
Title of host publicationWater Science and Technology
Pages283-290
Number of pages8
Volume55
Edition1-2
DOIs
StatePublished - 2007

Publication series

NameWater Science and Technology
Number1-2
Volume55
ISSN (Print)02731223

Fingerprint

cyst
chlorination
water
disinfection
public health
viability
risk assessment
infection
exposure

Keywords

  • Cryptosporidium
  • Giardia
  • Risk assessment
  • Water reuse

ASJC Scopus subject areas

  • Water Science and Technology

Cite this

Ryu, H., Alum, A., Mena, K. D., & Abbaszadegan, M. (2007). Assessment of the risk of infection by Cryptosporidium and Giardia in non-potable reclaimed water. In Water Science and Technology (1-2 ed., Vol. 55, pp. 283-290). (Water Science and Technology; Vol. 55, No. 1-2). https://doi.org/10.2166/wst.2007.047

Assessment of the risk of infection by Cryptosporidium and Giardia in non-potable reclaimed water. / Ryu, H.; Alum, Absar; Mena, K. D.; Abbaszadegan, Morteza.

Water Science and Technology. Vol. 55 1-2. ed. 2007. p. 283-290 (Water Science and Technology; Vol. 55, No. 1-2).

Research output: Chapter in Book/Report/Conference proceedingChapter

Ryu, H, Alum, A, Mena, KD & Abbaszadegan, M 2007, Assessment of the risk of infection by Cryptosporidium and Giardia in non-potable reclaimed water. in Water Science and Technology. 1-2 edn, vol. 55, Water Science and Technology, no. 1-2, vol. 55, pp. 283-290. https://doi.org/10.2166/wst.2007.047
Ryu H, Alum A, Mena KD, Abbaszadegan M. Assessment of the risk of infection by Cryptosporidium and Giardia in non-potable reclaimed water. In Water Science and Technology. 1-2 ed. Vol. 55. 2007. p. 283-290. (Water Science and Technology; 1-2). https://doi.org/10.2166/wst.2007.047
Ryu, H. ; Alum, Absar ; Mena, K. D. ; Abbaszadegan, Morteza. / Assessment of the risk of infection by Cryptosporidium and Giardia in non-potable reclaimed water. Water Science and Technology. Vol. 55 1-2. ed. 2007. pp. 283-290 (Water Science and Technology; 1-2).
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