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Effect of the radiation intensity, water turbidity and exposure time on the survival of Cryptosporidium during simulated solar disinfection of drinking water.
Acta Trop. 2009 Oct; 112(1):43-8.AT

Abstract

The solar disinfection (SODIS) technique is a highly effective process that makes use of solar energy to inactivate pathogenic microorganisms in drinking water in developing countries. The pathogenic protozoan parasite Cryptosporidium parvum is often found in surface waters and is associated with waterborne outbreaks of cryptosporidiosis. In the present study, a complete multi-factorial mathematical model was used to investigate the combined effects of the intensity of solar radiation (200, 600 and 900W/m(2) in the 320nm to 10microm range), water turbidity (5, 100 and 300 NTU) and exposure time (4, 8 and 12h) on the viability and infectivity of C. parvum oocysts during simulated SODIS procedures at a constant temperature of 30 degrees C. All three factors had significant effects (p<0.05) on C. parvum survival, as did the interactions of water turbidity with radiation intensity and radiation intensity with exposure time. However, the parameter with the greatest effect was the intensity of radiation; levels > or =600W/m(2) and times of exposure between 8 and 12h were required to reduce the oocyst infectivity in water samples with different degrees of turbidity.

Authors+Show Affiliations

Departamento de Microbiología y Parasitología, Universidad de Santiago de Compostela, La Coruña, Spain.No affiliation info availableNo affiliation info availableNo affiliation info available

Pub Type(s)

Journal Article
Research Support, Non-U.S. Gov't

Language

eng

PubMed ID

19539587

Citation

Gómez-Couso, Hipólito, et al. "Effect of the Radiation Intensity, Water Turbidity and Exposure Time On the Survival of Cryptosporidium During Simulated Solar Disinfection of Drinking Water." Acta Tropica, vol. 112, no. 1, 2009, pp. 43-8.
Gómez-Couso H, Fontán-Sainz M, McGuigan KG, et al. Effect of the radiation intensity, water turbidity and exposure time on the survival of Cryptosporidium during simulated solar disinfection of drinking water. Acta Trop. 2009;112(1):43-8.
Gómez-Couso, H., Fontán-Sainz, M., McGuigan, K. G., & Ares-Mazás, E. (2009). Effect of the radiation intensity, water turbidity and exposure time on the survival of Cryptosporidium during simulated solar disinfection of drinking water. Acta Tropica, 112(1), 43-8. https://doi.org/10.1016/j.actatropica.2009.06.004
Gómez-Couso H, et al. Effect of the Radiation Intensity, Water Turbidity and Exposure Time On the Survival of Cryptosporidium During Simulated Solar Disinfection of Drinking Water. Acta Trop. 2009;112(1):43-8. PubMed PMID: 19539587.
* Article titles in AMA citation format should be in sentence-case
TY - JOUR T1 - Effect of the radiation intensity, water turbidity and exposure time on the survival of Cryptosporidium during simulated solar disinfection of drinking water. AU - Gómez-Couso,Hipólito, AU - Fontán-Sainz,María, AU - McGuigan,Kevin G, AU - Ares-Mazás,Elvira, Y1 - 2009/06/17/ PY - 2008/12/30/received PY - 2009/05/28/revised PY - 2009/06/10/accepted PY - 2009/6/23/entrez PY - 2009/6/23/pubmed PY - 2009/10/10/medline SP - 43 EP - 8 JF - Acta tropica JO - Acta Trop. VL - 112 IS - 1 N2 - The solar disinfection (SODIS) technique is a highly effective process that makes use of solar energy to inactivate pathogenic microorganisms in drinking water in developing countries. The pathogenic protozoan parasite Cryptosporidium parvum is often found in surface waters and is associated with waterborne outbreaks of cryptosporidiosis. In the present study, a complete multi-factorial mathematical model was used to investigate the combined effects of the intensity of solar radiation (200, 600 and 900W/m(2) in the 320nm to 10microm range), water turbidity (5, 100 and 300 NTU) and exposure time (4, 8 and 12h) on the viability and infectivity of C. parvum oocysts during simulated SODIS procedures at a constant temperature of 30 degrees C. All three factors had significant effects (p<0.05) on C. parvum survival, as did the interactions of water turbidity with radiation intensity and radiation intensity with exposure time. However, the parameter with the greatest effect was the intensity of radiation; levels > or =600W/m(2) and times of exposure between 8 and 12h were required to reduce the oocyst infectivity in water samples with different degrees of turbidity. SN - 1873-6254 UR - https://www.unboundmedicine.com/medline/citation/19539587/Effect_of_the_radiation_intensity_water_turbidity_and_exposure_time_on_the_survival_of_Cryptosporidium_during_simulated_solar_disinfection_of_drinking_water_ L2 - https://linkinghub.elsevier.com/retrieve/pii/S0001-706X(09)00155-7 DB - PRIME DP - Unbound Medicine ER -