Table 4: Prevalence of bacteria isolated on documents exhibiting different physiological characteristic.

Type of document (CFU · cm−2)
TABABPBAcidifying BSulphite RB  ( sp.)

M13.5 1041.1 1044.2 103
M27.1 1053.0 1043.0 105
M3203+
L12
F12.2 1033.4 1032.3 103++
F23.0 1041.0 103.7 104
F33.0 1042.5 1043.0 104
F3A1.2 1057.2 1032.4 105+
F43.9 1041.6 104+
P1a1.3 10320+
P1b4.0 10233+
P21.1 1063 1031.1 103++

TAB: total aerobic bacteria determined on nutrient agar; AB: amylolytic bacteria determined on starch agar; PB: proteolytic bacteria determined on Frazier gelatin agar; Acidifying B: acidifying bacteria determined on broth for total acidifying bacteria; sulphite RB: sulphite reducing bacteria determined on reinforced Clostridium medium (DRCM).