4. AOACRIMicroMethods-2018Awards

87

774  B ird et al . : J ournal of AOAC I nternational V ol . 98, N o . 3, 2015

Table 2. Total yeast and mold log 10 counts for frozen raw ground beef patties by 3M Petrifilm RYM Count Plate after 48 h incubation at 25 ° C versus FDA BAM (ref. 1) and ISO 21527 (ref. 4) reference methods a Uninoculated control Low Medium High Petrifilm RYM FDA BAM/ISO 21527 b Petrifilm RYM FDA BAM/ISO 21527 Petrifilm RYM FDA BAM/ISO 21527 Petrifilm RYM FDA BAM/ISO 21527 Lab A c B A B A B A B A B A B A B A B 1 <1.00 <1.00 <1.00 <1.00 2.18 1.78 2.23 1.60 3.45 3.38 3.49 3.32 4.64 4.62 4.32 4.54 2 <1.00 <1.00 <1.00 <1.00 2.43 2.48 2.43 2.83 3.62 3.71 3.49 3.45 4.62 4.73 4.53 4.52 3 <1.00 <1.00 <1.00 <1.00 2.34 2.30 2.41 2.32 3.52 3.30 3.63 3.53 4.64 4.40 4.82 4.81 4 d NA NA NA NA NA NA NA NA NA NA NA NA NA NA NA NA 5 <1.00 <1.00 <1.00 <1.00 1.95 1.78 1.70 2.00 3.41 3.53 3.30 3.41 4.43 4.51 4.46 4.64 6 d NA NA NA NA NA NA NA NA NA NA NA NA NA NA NA NA 7 <1.00 <1.00 <1.00 <1.00 2.23 2.36 1.80 1.82 3.51 3.56 3.36 3.61 4.79 4.32 4.43 4.49 8 d NA NA NA NA NA NA NA NA NA NA NA NA NA NA NA NA 9 <1.00 <1.00 <1.00 <1.00 2.45 2.23 2.28 2.23 3.56 3.60 3.51 3.45 4.72 4.73 4.57 4.79 10 <1.00 <1.00 <1.00 <1.00 2.20 2.20 2.11 2.00 3.60 3.45 3.45 3.43 4.76 4.61 4.66 4.40 11 <1.00 <1.00 <1.00 <1.00 2.36 1.00 2.40 1.90 3.57 3.66 3.49 3.54 4.68 4.56 4.49 4.59 12 d NA NA NA NA NA NA NA NA NA NA NA NA NA NA NA NA 13 <1.00 <1.00 <1.00 <1.00 2.45 2.08 2.00 1.67 3.49 3.51 3.52 3.48 4.75 4.89 4.67 4.77 14 <1.00 <1.00 <1.00 <1.00 2.20 1.00 2.34 e 1.00 e 3.41 3.67 3.57 3.70 4.70 4.60 4.65 4.62 15 <1.00 <1.00 <1.00 <1.00 2.30 2.28 2.15 2.23 3.38 3.53 3.38 3.23 4.72 4.85 4.61 4.66 a  Log 10 yeast and mold CFU/g.

b  FDA BAM and ISO 21257 reference method replicates were enumerated at 5 and 7 days (uninoculated test portions) of incubation at 25 ° C c  A and B = Indicated duplicate test portions. d  Laboratory data not included in statistical analysis for all contamination levels. e  Cochran’s outlier.

03/10/2019