NDLI: Preliminary study on the occurrence and risk arising from bacteria internalized in zooplankton in drinking water.

Content Provider	World Health Organization (WHO)-Global Index Medicus
Author	Bichai, F. Hijnen, W. Baars, Eric Rosielle, M. Dullemont, Y. Barbeau, B.
Description	Author Affiliation: Bichai F ( NSERC Industrial Chair on Drinking Water, École Polytechnique de Montreal, Department of Civil, Geological, and Mining Engineering, P.O. Box 6079, Downtown Station, Montreal (Quebec) Canada H3C 3A7. francoise.bichai@polymtl.ca)
Abstract	In this study, an environmental sampling campaign was conducted to detect internalized E. coli and C. jejuni bacteria in zooplankton and amoebae samples collected at various stages of three water treatment plants in Amsterdam, the Netherlands. Eight sampling locations were selected and sampling was performed twice, at a two-week interval, at each location. Chlorination was used to inactivate free (external) bacteria in the concentrated zooplankton samples and sonication was used to disrupt zooplankton organisms in order to release and recover internalized bacteria. Zooplankton enumeration was performed by microscopy. No internalized E. coli or C. jejuni bacteria were recovered from all of the samples analyzed. The occurrence of internalized E. coli or C. jejuni bacteria in drinking water was estimated to be lower than one internalized bacteria in 105 zooplankton organisms, as derived from the detection limit of the sampling campaign. By using the QMRA approach and the Beta-Poisson model, a risk of infection of less than 9.2E-6 and 5.9E-5 was estimated for internalized E. coli and C. jejuni in drinking water, respectively. This study remains preliminary due to the limited number of samples taken at each location.
File Format	HTM / HTML
ISSN	02731223
Issue Number	1
Volume Number	63
e-ISSN	19969732
Journal	Water Science & Technology
Language	English
Publisher	IWA Publishing
Publisher Date	2011-01-01
Publisher Place	Great Britain (UK)
Access Restriction	Subscribed
Subject Keyword	Discipline Hydrology Campylobacter Jejuni Isolation & Purification Escherichia Coli Water Microbiology Zooplankton Amoeba Animals Colony Count, Microbial Risk Assessment Journal Article
Content Type	Text
Resource Type	Article
Subject	Environmental Engineering Water Science and Technology

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