sentence: The concentration of AdV and AiV ( up to 10 gc / l ) were similar in river water collected in the USA ( Colorado ) and Japan ( Betancourt et al ., 2014 ; Hata et al ., 2014 ; Sassi et al ., 2018 ) , whereas AdV was more prevalent than PyV in river water samples collected in Spain ( 76 % vs 48 % detection rates ) , the UK ( Wales : 88 % vs 65 % ) , Japan ( 61 % vs 11 % ) and Germany ( 79 % vs 59 % ) ( Albinana-Gimenez et al ., 2009 ; Farkas et al ., 2018a ; Haramoto et al ., 2010 ; Jurzik et al ., 2010 ; Rusi ñ ol et al ., 2015 ) .