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Large outbreak of cryptosporidium hominis infection transmitted through the public water supply, Sweden
Umeå University, Faculty of Medicine, Department of Clinical Microbiology, Infectious Diseases. Jämtland Cty Council, Östersund, Sweden.
Umeå University, Faculty of Medicine, Department of Public Health and Clinical Medicine, Family Medicine.
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2014 (English)In: Emerging Infectious Diseases, ISSN 1080-6040, E-ISSN 1080-6059, Vol. 20, no 4, 581-589 p.Article in journal (Refereed) Published
Abstract [en]

In November 2010, approximate to 27,000 (approximate to 45%) inhabitants of Östersund, Sweden, were affected by a waterborne outbreak of cryptosporidiosis. The outbreak was characterized by a rapid onset and high attack rate, especially among young and middle-aged persons. Young age, number of infected family members, amount of water consumed daily, and gluten intolerance were identified as risk factors for acquiring cryptosporidiosis. Also, chronic intestinal disease and young age were significantly associated with prolonged diarrhea. Identification of Ctyptosporidium hominis subtype lbA10G2 in human and environmental samples and consistently low numbers of oocysts in drinking water confirmed insufficient reduction of parasites by the municipal water treatment plant. The current outbreak shows that use of inadequate microbial barriers at water treatment plants can have serious consequences for public health. This risk can be minimized by optimizing control of raw water quality and employing multiple barriers that remove or inactivate all groups of pathogens.

Place, publisher, year, edition, pages
2014. Vol. 20, no 4, 581-589 p.
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Infectious Medicine Immunology in the medical area
URN: urn:nbn:se:umu:diva-88387DOI: 10.3201/eid2004.121415ISI: 000333504700007OAI: diva2:719818
Available from: 2014-05-27 Created: 2014-05-05 Last updated: 2015-02-12Bibliographically approved

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Widerström, MicaelLilja, MikaelFerm, MartinReuterwall, ChristinaSamuelsson, Eva
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