120 27 u00b1 20 lt 5 53 lt 5 54 12 u00d7 10 sup 4 u00b1 61 u00d7 10 sup 3 76 89 u00d7 10 sup 5 u00b1 18 u00d7 10 sup 5 102 12 u00d7 10 sup 6 u00b1 24 u00d7 10 sup 5 13 u00b1 13 lt 5 125 12 u00d7 10 sup 6 u00b1 23 u00d7 10 sup 5 146 10 4 u00d7 10 sup 6 u00b1 16 u00d7 10 sup 5 148 lt 5 lt 5 267 92 u00d7 10 sup 5 u00b1 27 u00d7 10 sup 5 287 lt 5 lt 5 293 93 u00d7 10 sup 5 u00b1 22 u00d7 10 sup 5 413 77 u00d7 10 sup 5 u00b1 24 u00d7 10 sup 5 414 lt 5 lt 5 624 46 u00d7 10 sup 5 u00b1 26 u00d7 10 sup 5 646 lt 5 lt 51127 36 u00d7 10 sup 5 u00b1 87 u00d7 10 sup 4 lt 5 lt 5______________________________________ in the second test the bacterial growth is rapid in the presence of film and a maximum approximately 107 ufc ml is reached after approximately 60 hours of agitation see table 22 and fig1 the maximum population was reached more quickly but the initial population was 70 ufc ml compared to 20.