The occurrence of Cryptosporidium and Giardia in the Lake Baroon catchment, Queensland, Australia

Tracey D Wohlsen; J Bates; B Gray; P Aldridge; J Stewart; M Williams; Mohammad Katouli

doi:10.2166/aqua.2006.044

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The occurrence of Cryptosporidium and Giardia in the Lake Baroon catchment, Queensland, Australia

Journal article

Peer reviewed

The occurrence of Cryptosporidium and Giardia in the Lake Baroon catchment, Queensland, Australia

Tracey D Wohlsen, J Bates, B Gray, P Aldridge, J Stewart, M Williams and Mohammad Katouli

Journal of Water Supply: Research and Technology. AQUA, Vol.55(5), pp.357-366

2006

DOI: https://doi.org/10.2166/aqua.2006.044

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Abstract

catchment

Cryptosporidium

Giardia

health risk

We evaluated the occurrence of Cryptosporidium and Giardia in the Lake Baroon catchment, Queensland, Australia. A total of 132 water samples were collected from 6 sites as well as from raw influent and treated effluent from a local sewage treatment plant (STP), over a 12-month period. Three new sites close to the entrance of the lake were added following initial assessment. The prevalence of faecal indicator organisms, E. coli and enterococci was also examined. There was no clear relationship between the level of indicator organisms, rainfall or the detection of Cryptosporidium and Giardia for most sites. Of the five sites showing levels of contamination with Cryptosporidium, only three coincided with elevated rainfall. The highest level of Cryptosporidium oocysts detected in the raw influent from the STP, coincided with the occurrence of an outbreak of cryptosporidiosis in the local area but no Cryptosporidium was detected in surface water samples during that period. Our results indicate that while the human contribution of Cryptosporidium is minimal, the high level of faecal indicator bacteria in surface water was not always associated with the presence Cryptosporidium in this catchment.

Details

Title: The occurrence of Cryptosporidium and Giardia in the Lake Baroon catchment, Queensland, Australia
Authors: Tracey D Wohlsen (Author) - Queensland Health Scientific Services
J Bates (Author) - Queensland Health Scientific Services
B Gray (Author) - Queensland Health Scientific Services
P Aldridge (Author) - Aquagen, Water and Renewable Energy
J Stewart (Author) - Aquagen, Water and Renewable Energy
M Williams (Author) - Aquagen, Water and Renewable Energy
Mohammad Katouli (Author) - University of the Sunshine Coast - Faculty of Science, Health and Education
Publication details: Journal of Water Supply: Research and Technology. AQUA, Vol.55(5), pp.357-366
Publisher: IWA Publishing
Date published: 2006
DOI: 10.2166/aqua.2006.044
ISSN: 1606-9935
Organisation Unit: Faculty of Science, Health, Education and Engineering; University of the Sunshine Coast, Queensland; School of Health and Sport Sciences - Legacy; School of Science, Technology and Engineering; Centre for Bioinnovation
Language: English
Record Identifier: 99449557502621
Output Type: Journal article

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