4. AOACRIMicroMethods-2018Awards

89

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

Table 4. Total yeast and mold log 10 counts for frozen raw ground beef patties by 3M Petrifilm RYM Count Plate after 48 h incubation at 28 ° 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 1.48 2.23 1.60 3.49 3.38 3.49 3.32 4.64 4.66 4.32 4.54 2 <1.00 <1.00 <1.00 <1.00 2.38 2.57 2.43 2.83 3.68 3.62 3.49 3.45 4.64 4.68 4.53 4.52 3 <1.00 <1.00 <1.00 <1.00 2.30 2.45 2.41 2.32 3.66 3.30 3.63 3.53 4.68 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 1.70 2.04 1.70 2.00 3.56 3.51 3.30 3.41 4.53 4.53 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 2.18 2.26 1.80 1.82 3.46 3.61 3.36 3.61 4.65 4.54 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 2.30 2.26 2.28 2.23 3.59 3.54 3.51 3.45 4.66 4.75 4.57 4.79 10 <1.00 <1.00 <1.00 <1.00 2.20 2.15 2.11 2.00 3.60 3.45 3.45 3.43 4.79 4.60 4.66 4.40 11 <1.00 <1.00 <1.00 <1.00 2.48 1.70 2.40 1.90 3.56 3.64 3.49 3.54 4.73 4.66 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 2.52 2.18 2.00 1.67 3.41 3.41 3.52 3.48 4.80 4.92 4.67 4.77 14 <1.00 <1.00 <1.00 <1.00 2.23 1.60 2.34 e 1.00 e 3.60 3.59 3.57 3.70 4.71 4.67 4.65 4.62 15 <1.00 <1.00 <1.00 <1.00 2.34 2.20 2.15 2.23 3.49 3.41 3.38 3.23 4.72 4.73 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