Micro December 2018
1
Dry Dog Food
0 0.5 1 1.5 2 2.5 3 3.5 4
yBAM = 0.9728x + 0.0414 R² = 0.9796
3M Petrifilm REC ISO
yREC = 0.9726x + 0.026 R² = 0.9704
LOG 10 REP A CFU/g
0
0.5
1
1.5
2
2.5
3
3.5
4
LOG 10
REP B CFU/g
2 Figure 3: Youden’s Plot for 3M Petrifilm Rapid E. coli /Coliform Count Plate (37 o C) and ISO 4832 3 for Coliform s
4 5 6 7
Dry Dog Food
0 0.5 1 1.5 2 2.5 3 3.5 4
yISO = 0.9878x + 0.0548 R² = 0.9702
3M Petrifilm REC ISO
yREC = 1.0003x + 0.0355 R² = 0.9632
LOG 10 REP A CFU/g
0
0.5
1
1.5
2
2.5
3
3.5
4
LOG 10
REP B CFU/g
8 Figure 4: Youden’s Plot for 3M Petrifilm Rapid E. coli /Coliform Count Plate (37 o C) and ISO 9 16649-2 for E. coli
10 11
20
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