sentence: Comparative studies showed that PMMoV occurred at higher concentration than AdV , AiV and PyV in surface water bodies in the USA ( Arizona : 10 -10 gc / l and Colorado : 10 -10 gc / l ) , Germany ( 10 -10 gc / l ) and Vietnam ( 10 -10 gc / l ) ( Betancourt et al ., 2014 ; Hamza et al ., 2011 ; Kuroda et al ., 2015 ; Sassi et al ., 2018 ) .