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Type: Journal article
Title: Multiplication of the waterborne pathogen Cryptosporidium parvum in an aquatic biofilm system
Author: Koh, W.
Clode, P.
Monis, P.
Thompson, R.
Citation: Parasites and Vectors, 2013; 6(1):270-1-270-11
Publisher: BioMed Central
Issue Date: 2013
ISSN: 1756-3305
Statement of
Wan Koh, Peta L Clode, Paul Monis and RC Andrew Thompson
Abstract: Background: In natural aquatic environments biofilms are known to act as environmental reservoirs for Cryptosporidium parvum oocysts. However, the fate of these oocysts within biofilms has yet to be determined. Methods: This study aimed to identify if biofilms have the ability to support the multiplication of Cryptosporidium by measuring the change in parasite number over time using quantitative polymerase chain reaction (qPCR) and detecting the possible extracellular developmental stages using a combination of confocal microscopy and immunolabelling techniques. Pseudomonas aeruginosa biofilm flow cell systems were established and C. parvum oocysts were constantly supplied over a six day period. Results: A significant (P<0.001) increase in Cryptosporidium was detected as the biofilm matured, with the total number of C. parvum multiplying 2-3 fold during this period. With this, various Cryptosporidium developmental stages (sporozoites, trophozoites, type I and II meronts) were identified from the biofilm. Conclusion: This is the first study demonstrating that biofilms not only serve as an environmental reservoir for oocysts, but are also capable of supporting the multiplication of Cryptosporidium over time in an aquatic environment.
Keywords: Cryptosporidium; biofilms; extracellular multiplication; water; qPCR; fluorescence
Rights: © 2013 Koh et al.; licensee BioMed Central Ltd. This is an Open Access article distributed under the terms of the Creative Commons Attribution License (, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.
DOI: 10.1186/1756-3305-6-270
Grant ID: ARC
Appears in Collections:Aurora harvest 8
Microbiology and Immunology publications

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