liu.seSearch for publications in DiVA
Change search
CiteExportLink to record
Permanent link

Direct link
Cite
Citation style
  • apa
  • harvard1
  • ieee
  • modern-language-association-8th-edition
  • vancouver
  • oxford
  • Other style
More styles
Language
  • de-DE
  • en-GB
  • en-US
  • fi-FI
  • nn-NO
  • nn-NB
  • sv-SE
  • Other locale
More languages
Output format
  • html
  • text
  • asciidoc
  • rtf
Short- and long-term variations of norovirus concentrations in the Meuse river during a 2-year study period
Linköping University, The Tema Institute, Department of Water and Environmental Studies. Linköping University, Faculty of Arts and Sciences.
Computerization and Methodological Consultancy Unit, National Institute of Public Health and the Environment (RIVM), Bilthoven, The Netherlands.
Microbiological Laboratory for Health Protection, National Institute of Public Health and the Environment (RIVM), Bilthoven, The Netherlands.
Microbiological Laboratory for Health Protection, National Institute of Public Health and the Environment (RIVM), Bilthoven, The Netherlands.
Show others and affiliations
2006 (English)In: Water Research, ISSN 0043-1354, Vol. 40, no 14, 2613-2620 p.Article in journal (Refereed) Published
Abstract [en]

Faecally impacted surface waters used for drinking water production may encompass risk for norovirus infections. To be able to assess a possible health risk, noroviruses should be quantified and fluctuations identified. In 2001, norovirus concentrations in the river Meuse displayed a seasonal distribution with high peaks during wintertime as determined by RT-PCR on serially diluted RNA. An intensified day-by-day sampling scheme in the winter of 2002/2003 revealed that the winter peak consisted of several peaks of varying duration and magnitude, possibly due to contamination events in the catchment. The highest estimated concentration was 1700 PCR-detectable units per litre (95% CI 250–8000), which if coinciding with failing treatment could lead to significant numbers in drinking water. Adaptive dynamic filtering was shown to adequately predict subsequent sample concentrations. If valid, such analyses could prove to be useful as early warning systems in risk management of water sources.

Place, publisher, year, edition, pages
2006. Vol. 40, no 14, 2613-2620 p.
Keyword [en]
Noroviruses; Surface water; Seasonal distribution; Peaks; Adaptive dynamic filtering
National Category
Oceanography, Hydrology, Water Resources
Identifiers
URN: urn:nbn:se:liu:diva-13459DOI: 10.1016/j.watres.2006.05.019OAI: oai:DiVA.org:liu-13459DiVA: diva2:20790
Note

On the day of the defence date the title of this article was Short and Long Term Flucturations of Norovirus Concentrations in Surface Water and their Implications for Publich Health.

Available from: 2004-12-19 Created: 2004-12-19 Last updated: 2014-09-22
In thesis
1. Microbial risk assessment and its implications for risk management in urban water systems
Open this publication in new window or tab >>Microbial risk assessment and its implications for risk management in urban water systems
2004 (English)Doctoral thesis, comprehensive summary (Other academic)
Abstract [en]

Infectious disease can be transmitted via various environmental pathways, many of which are incorporated into our water and wastewater systems. Quantitative microbial risk assessment (QMRA) can be a valuable tool in identifying hazard exposure pathways and estimating their associated health impacts. QMRA can be applied to establish standards and guidelines and has been adopted by the World Health Organisation for the management of risks from water-related infectious diseases. This thesis aims at presenting a holistic approach for the assessment of microbial health risks in urban water and wastewater systems. The procedure of QMRA is presented, together with the data collected for the case studies, and the results are discussed in a risk management framework.

Decentralised drinking water treatment with membranes was shown to be competitive with centralised conventional treatment regarding environmental impacts and health. To attain sufficient die-off of pathogens in order to reduce risks to acceptable levels, facilities that permit the long-term storage of locally collected faeces are required. Issues of operation and mangement are likely to determine the health risks in decentralised systems. While failures in distribution are more likely to result in detectable waterborne disease outbreaks, the number of people at risk of becoming infected with pathogens passing normal treatment, calculated on a yearly basis, can be larger. Site-specific pathogen monitoring of source waters was identified as an important factor for the accurate estimation of risk. Noroviruses, an emerging waterborne pathogen, were shown to have fluctuating concentrations in surface water, with significant peaks during the wintertime. Time series analysis has potential as an early warning system if complemented by regular monitoring to discriminate peaks from random fluctuations. Groups already sensitive to infection, i.e. the elderly, the sick and children, were shown to consume higher volumes of cold tap water than the rest of the population, which may call for special atention in the risk management of drinking water systems. Microbial health risks associated with the handling and reuse of wastewater and sludge were shown to be successfully addressed within the management system Hazard Analysis and Critical Control Points (HACCP). Most exposure points identified could be controlled through easy measures.

Place, publisher, year, edition, pages
Linköping: Linköping University Electronic Press, 2004. 84 p.
Series
Linköping Studies in Arts and Science, ISSN 0282-9800 ; 304
Keyword
Quantitative microbial risk assessment, pathogens, urban, decentralised, failures, noroviruses, water consumption, HACCP, drinking water, wastewater, sludge, faeces, risk management
National Category
Oceanography, Hydrology, Water Resources
Identifiers
urn:nbn:se:liu:diva-4880 (URN)91-85295-98-1 (ISBN)
Public defence
2004-12-10, Elysion, Hus T, Campus Valla, Linköpings universitet, Linköping, 10:15 (English)
Supervisors
Note
Copyright Agreement: Figure 6-1, page 49 and figure 6-2, page 50 in the summary/introduction are reprinted from Water Science and Technology: Water Supply 2(2) 11-18, with permission from the copyright holders, IWA. Note: the median values are missing in the article but the figures have been corrected in the summary/introduction.Available from: 2004-12-19 Created: 2004-12-19 Last updated: 2012-01-25Bibliographically approved

Open Access in DiVA

No full text

Other links

Publisher's full text

Authority records BETA

Westrell, ThereseStenström, Thor-Axel

Search in DiVA

By author/editor
Westrell, ThereseStenström, Thor-Axel
By organisation
Department of Water and Environmental StudiesFaculty of Arts and Sciences
Oceanography, Hydrology, Water Resources

Search outside of DiVA

GoogleGoogle Scholar

doi
urn-nbn

Altmetric score

doi
urn-nbn
Total: 77 hits
CiteExportLink to record
Permanent link

Direct link
Cite
Citation style
  • apa
  • harvard1
  • ieee
  • modern-language-association-8th-edition
  • vancouver
  • oxford
  • Other style
More styles
Language
  • de-DE
  • en-GB
  • en-US
  • fi-FI
  • nn-NO
  • nn-NB
  • sv-SE
  • Other locale
More languages
Output format
  • html
  • text
  • asciidoc
  • rtf