Effect of solar radiation on multidrug resistant E. coli strains and antibiotic mixture photodegradation in wastewater polluted stream

The Science of the Total Environment
Luigi RizzoAntonella Anselmo

Abstract

The effect of solar radiation on the inactivation of multidrug resistant Escherichia coli (MDR) strains selected from an urban wastewater treatment plant (UWWTP) effluent and the change of their resistance to a mixture of three antibiotics (evaluated in terms of minimum inhibit concentration (MIC)) in wastewater polluted stream were investigated. The solar photodegradation of the mixture of the three target antibiotics (amoxicillin (AMX), ciprofloxacin (CPX), and sulfamethoxazole (SMZ)) was also evaluated. Additionally, since UWWTP effluents are possible sources of antibiotics and antibiotic resistant bacteria, the disinfection by conventional chlorination process of the UWWTP effluent inoculated with MDR strains was investigated too. Solar radiation poorly affected the inactivation of the two selected antibiotic resistant E. coli strains (40 and 60% after 180 min irradiation). Moreover, solar radiation did not affect strain resistance to AMX (MIC>256 μg/mL) and SMZ (MIC>1024 μg/mL), but affected resistance of the lower resistance strain to CPX (MIC decreased by 33% but only after 180 min of irradiation). Chlorination of wastewater sample strongly decreased the number of the two selected antibiotic resistant E. coli strains (99...Continue Reading

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Citations

Aug 1, 2013·Environmental Science and Pollution Research International·João H O S PereiraRui A R Boaventura
Mar 20, 2013·Environmental Science and Pollution Research International·Ana Rita Varela, Célia M Manaia
Sep 11, 2014·Environmental Technology·Ruixin GuoJianqiu Chen
Mar 14, 2017·Water Research·Maria Vila-CostaJordi Dachs
Nov 1, 2012·The International Journal of Neuroscience·Alba Fiorentino, Vincenzo Fusco
Mar 13, 2014·Environmental Science. Processes & Impacts·Shuwen Yan, Weihua Song
May 10, 2020·Environmental Science and Pollution Research International·Samira BehraveshMohsen Soleimani
Sep 18, 2016·Environmental Science and Pollution Research International·Fatemeh Sadat Moosavi, Touraj Tavakoli

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