Micro December 2018

Dry Dog Food

-0.5 0 0.5 1 1.5 2 2.5 3 3.5 4

yBAM = 0.9706x + 0.0629 R² = 0.9841

3M Petrifilm REC BAM Chapter 4

yREC = 1.0111x - 0.053 R² = 0.9812

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

1 Figure 1: Youden’s Plot for 3M Petrifilm Rapid E. coli /Coliform Count Plate (35 o C) and FDA BAM 2 for Coliforms

3 4 5 6 7

Dry Dog Food

-0.5 0 0.5 1 1.5 2 2.5 3 3.5 4

yBAM = 0.9962x + 0.0213 R² = 0.9741

3M Petrifilm REC BAM Chapter 4

yREC = 1.0083x - 0.0406 R² = 0.9727

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 2: Youden’s Plot for 3M Petrifilm Rapid E. coli /Coliform Count Plate (35 o C) and FDA BAM 9 for E. coli

10 11

19