Solar and temporal effects on Escherichia coli concentration at a Lake Michigan swimming beach

Applied and Environmental Microbiology
Richard L WhitmanMuruleedhara N Byappanahalli

Abstract

Studies on solar inactivation of Escherichia coli in freshwater and in situ have been limited. At 63rd St. Beach, Chicago, Ill., factors influencing the daily periodicity of culturable E. coli, particularly insolation, were examined. Water samples for E. coli analysis were collected twice daily between April and September 2000 three times a week along five transects in two depths of water. Hydrometeorological conditions were continuously logged: UV radiation, total insolation, wind speed and direction, wave height, and relative lake level. On 10 days, transects were sampled hourly from 0700 to 1500 h. The effect of sunlight on E. coli inactivation was evaluated with dark and transparent in situ mesocosms and ambient lake water. For the study, the number of E. coli samples collected (n) was 2,676. During sunny days, E. coli counts decreased exponentially with day length and exposure to insolation, but on cloudy days, E. coli inactivation was diminished; the E. coli decay rate was strongly influenced by initial concentration. In situ experiments confirmed that insolation primarily inactivated E. coli; UV radiation only marginally affected E. coli concentration. The relationship between insolation and E. coli density is complicate...Continue Reading

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Citations

Oct 12, 2012·Environmental Science and Pollution Research International·Arnau Casanovas-Massana, Anicet R Blanch
Sep 18, 2013·Journal of Environmental Management·Kasia Przybyla-KellyRichard L Whitman
Dec 18, 2010·Environmental Science & Technology·Elizabeth Halliday, Rebecca J Gast
Jan 20, 2012·Environmental Science & Technology·Zhongfu GeMantha S Phanikumar
Sep 19, 2006·Applied and Environmental Microbiology·Richard L WhitmanMuruleedhara N Byappanahalli
Feb 1, 2011·Applied and Environmental Microbiology·Christopher J Schulz, Gary W Childers
Dec 8, 2009·Applied and Environmental Microbiology·Amir M AbdelzaherLora E Fleming
Sep 4, 2012·Applied and Environmental Microbiology·Lauren M SassoubreAlexandria B Boehm
Jan 1, 2008·Microbes and Environments·Satoshi Ishii, Michael J Sadowsky
Jan 27, 2010·Environmental Health Perspectives·Samuel DorevitchRichard L Whitman
Nov 11, 2014·Re/views in Environmental Science and Bio/technology·Richard WhitmanHelena M Solo-Gabriele
Jun 23, 2009·American Journal of Epidemiology·Christopher D HeaneyTimothy J Wade
Nov 29, 2012·Journal of Environmental Management·Wesley R BrooksSteven R Corsi
Oct 31, 2015·Journal of Environmental Management·Dawn A ShivelyRichard L Whitman
Oct 22, 2008·American Journal of Preventive Medicine·Jonathan A PatzSandra L McLellan
Jul 22, 2008·The Science of the Total Environment·Erik T EnglebertGregory T Kleinheinz
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Apr 29, 2016·Environmental Science & Technology·Peter MaracciniAlexandria B Boehm
Apr 28, 2016·Environmental Science & Technology·Peter MaracciniAlexandria B Boehm
Jul 28, 2016·The Science of the Total Environment·Jianyong Wu, Laura Jackson

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