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Applied and Environmental Microbiology, May 2002, p. 2576-2579, Vol. 68, No. 5
0099-2240/02/$04.00+0     DOI: 10.1128/AEM.68.5.2576-2579.2002
Copyright © 2002, American Society for Microbiology. All Rights Reserved.

Efficacy of Common Laboratory Disinfectants on the Infectivity of Cryptosporidium parvum Oocysts in Cell Culture

Susan C. Weir, Nicholas J. Pokorny, Ramon A. Carreno,,{dagger} Jack T. Trevors,* and Hung Lee*

Department of Environmental Biology, University of Guelph, Guelph, Ontario, Canada, N1G 2W1

Received 27 September 2001/ Accepted 2 March 2002

Nine liquid disinfectants were tested for their ability to reduce infectivity of Cryptosporidium parvum oocysts in cell culture. A 4-min exposure to 6% hydrogen peroxide and a 13-min exposure to ammonium hydroxide-amended windshield washer fluid reduced infectivity 1,000-fold. Other disinfectants tested (70% ethanol, 37% methanol, 6% sodium hypochlorite, 70% isopropanol, and three commercial disinfectants) did not reduce the infectivity after a 33-min exposure. The results indicate that hydrogen peroxide and windshield washer fluid or ammonium hydroxide disinfectant may be suitable laboratory disinfectants against C. parvum oocysts.

* Corresponding author. Mailing address: Department of Environmental Biology, University of Guelph, Guelph, Ontario, N1G 2W1, Canada. Phone: (519) 824-4120, ext. 3367 (J.T.T.) or 3828 (H.L.). Fax: (519) 837-0442. E-mail: jtrevors{at}uoguelph.ca.

* Corresponding author. Mailing address: Department of Environmental Biology, University of Guelph, Guelph, Ontario, N1G 2W1, Canada. Phone: (519) 824-4120, ext. 3367 (J.T.T.) or 3828 (H.L.). Fax: (519) 837-0442. E-mail: hlee{at}uoguelph.ca.

{dagger} Present address: Department of Nematology, University of California, Davis, Davis, CA 95616-8668.

Applied and Environmental Microbiology, May 2002, p. 2576-2579, Vol. 68, No. 5
0099-2240/02/$04.00+0     DOI: 10.1128/AEM.68.5.2576-2579.2002
Copyright © 2002, American Society for Microbiology. All Rights Reserved.



This article has been cited by other articles:

  • Quilez, J., Sanchez-Acedo, C., Avendano, C., del Cacho, E., Lopez-Bernad, F. (2005). Efficacy of Two Peroxygen-Based Disinfectants for Inactivation of Cryptosporidium parvum Oocysts. Appl. Environ. Microbiol. 71: 2479-2483 [Abstract] [Full Text]  


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