sentence: However , it has been shown that bacteria are significantly less resistant to wastewater treatment and less persistent in the environment than enteric viruses ( Fong et al ., 2005 ; Kim et al ., 2009 ; Lin and Ganesh , 2013 ; Prez et al ., 2015 ; Sidhu et al ., 2017a ; Staley et al ., 2012 ) .