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Applied and Environmental Microbiology, March 2005, p. 1653-1654, Vol. 71, No. 3
0099-2240/05/$08.00+0     doi:10.1128/AEM.71.3.1653-1654.2005
Copyright © 2005, American Society for Microbiology. All Rights Reserved.

SHORT REPORT

Effect of Batch-Process Solar Disinfection on Survival of Cryptosporidium parvum Oocysts in Drinking Water

F. Méndez-Hermida,1 J. A. Castro-Hermida,1 E. Ares-Mazás,1 S. C. Kehoe,2 and K. G. McGuigan3*

Department of Microbiology & Parasitology, Faculty of Pharmacy, University of Santiago de Compostela, Santiago de Compostela, Spain,1 Department of Surgery,2 Department of Physiology and Medical Physics, Royal College of Surgeons in Ireland, Dublin, Ireland3

Received 12 May 2004/ Accepted 18 October 2004

ABSTRACT

The results of batch-process solar disinfection (SODIS) of Cryptosporidium parvum oocysts in water are reported. Oocyst suspensions were exposed to simulated sunlight (830 W m–2) at 40°C. Viability assays (4',6'-diamidino-2-phenylindole [DAPI]/propidium iodide and excystation) and infectivity tests (Swiss CD-1 suckling mice) were performed. SODIS exposures of 6 and 12 h reduced oocyst infectivity from 100% to 7.5% (standard deviation = 2.3) and 0% (standard deviation = 0.0), respectively.

* Corresponding author. Mailing address: Dept. of Physiology and Medical Physics, Royal College of Surgeons in Ireland, St. Stephen's Green, Dublin 2, Ireland. Phone: 353 1 4022207. E-mail: kmcguigan{at}rcsi.ie.

Applied and Environmental Microbiology, March 2005, p. 1653-1654, Vol. 71, No. 3
0099-2240/05/$08.00+0     doi:10.1128/AEM.71.3.1653-1654.2005
Copyright © 2005, American Society for Microbiology. All Rights Reserved.





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