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 Previous Article

Applied and Environmental Microbiology, May 2005, p. 2800-2802, Vol. 71, No. 5
0099-2240/05/$08.00+0     doi:10.1128/AEM.71.5.2800-2802.2005
Copyright © 2005, American Society for Microbiology. All Rights Reserved.

SHORT REPORT

UV Inactivation of Cryptosporidium hominis as Measured in Cell Culture

Anne M. Johnson,1 Karl Linden,2 Kristina M. Ciociola,3,{dagger} Ricardo De Leon,1 Giovanni Widmer,3 and Paul A. Rochelle1*

Water Quality Laboratory, Metropolitan Water District of Southern California, La Verne, California,1 Department of Civil and Environmental Engineering, Duke University, Durham, North Carolina,2 Division of Infectious Diseases, Tufts University School of Veterinary Medicine, North Grafton, Massachusetts3

Received 27 October 2004/ Accepted 9 December 2005

The Cryptosporidium spp. UV disinfection studies conducted to date have used Cryptosporidium parvum oocysts. However, Cryptosporidium hominis predominates in human cryptosporidiosis infections, so there is a critical need to assess the efficacy of UV disinfection of C. hominis. This study utilized cell culture-based methods to demonstrate that C. hominis oocysts displayed similar levels of infectivity and had the same sensitivity to UV light as C. parvum. Therefore, the water industry can be confident about extrapolating C. parvum UV disinfection data to C. hominis oocysts.

* Corresponding author. Mailing address: The Metropolitan Water District of Southern California, Water Quality Laboratory, 700 Moreno Avenue, La Verne, CA 91750. Phone: (909) 392-5155. Fax: (909) 392-5246. E-mail: prochelle{at}mwdh2o.com.

{dagger} Present address: Division of Hematology/Oncology, Department of Medicine, Beth Israel Deaconess Medical Center, Boston, Mass.

Applied and Environmental Microbiology, May 2005, p. 2800-2802, Vol. 71, No. 5
0099-2240/05/$08.00+0     doi:10.1128/AEM.71.5.2800-2802.2005
Copyright © 2005, American Society for Microbiology. All Rights Reserved.



This article has been cited by other articles:

  • Sifuentes, L. Y., Di Giovanni, G. D. (2007). Aged HCT-8 Cell Monolayers Support Cryptosporidium parvum Infection. Appl. Environ. Microbiol. 73: 7548-7551 [Abstract] [Full Text]  
  • Al-Adhami, B. H., Nichols, R. A. B., Kusel, J. R., O'Grady, J., Smith, H. V. (2007). Detection of UV-Induced Thymine Dimers in Individual Cryptosporidium parvum and Cryptosporidium hominis Oocysts by Immunofluorescence Microscopy. Appl. Environ. Microbiol. 73: 947-955 [Abstract] [Full Text]  
  • Brownell, S. A., Nelson, K. L. (2006). Inactivation of Single-Celled Ascaris suum Eggs by Low-Pressure UV Radiation.. Appl. Environ. Microbiol. 72: 2178-2184 [Abstract] [Full Text]  


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