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Solar disinfection of poliovirus and Acanthamoeba polyphaga cysts in water – a laboratory study using simulated sunlight
Author(s) -
Heaselgrave W.,
Patel N.,
Kilvington S.,
Kehoe S.C.,
McGuigan K.G.
Publication year - 2006
Publication title -
letters in applied microbiology
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.698
H-Index - 110
eISSN - 1472-765X
pISSN - 0266-8254
DOI - 10.1111/j.1472-765x.2006.01940.x
Subject(s) - poliovirus , acanthamoeba , biology , sunlight , water treatment , microbiology and biotechnology , environmental engineering , environmental science , virology , virus , physics , astronomy
Abstract Aims: To determine the efficacy of solar disinfection (SODIS) in disinfecting water contaminated with poliovirus and Acanthamoeba polyphaga cysts. Methods and Results: Organisms were subjected to a simulated global solar irradiance of 850 Wm −2 in water temperatures between 25 and 55°C. SODIS at 25°C totally inactivated poliovirus after 6‐h exposure (reduction of 4·4 log units). No SODIS‐induced reduction in A. polyphaga cyst viability was observed for sample temperatures below 45°C. Total cyst inactivation was only observed after 6‐h SODIS exposure at 50°C (3·6 log unit reduction) and after 4 h at 55°C (3·3 log unit reduction). Conclusions: SODIS is an effective means of disinfecting water contaminated with poliovirus and A. polyphaga cysts, provided water temperatures of 50–55°C are attained in the latter case. Significance and Impact of the Study: This research presents the first SODIS inactivation curve for poliovirus and provides further evidence that batch SODIS provides effective protection against waterborne protozoan cysts.