376-377 / 596
31
Table
24
. Individual Collaborator Results for Raw Chicken Breast Fillet
High Level Test Portions
Low Level Test Portions
Un-inoculated Test Portions
1
2
3
4
5
6
7
8
9
10 11
12
1
2
3
4
5
6
7
8
9
10
11
12
1
2
3
4
5
6
7
8
9
10
11
12
3M MDA 2 -
Listeria
Lab
a
1
+
+
+ +
+
+ +
+
+ +
+
+
+ +
-
-
-
-
-
+ +
+ +
+
-
-
-
-
-
-
-
-
-
-
-
-
2
+
+
+ +
+
+ +
+
+ +
+
+
-
+ + + +
-
+
-
+
+ +
+
-
-
-
-
-
-
-
-
-
+
c
-
-
3
+
+
+ +
+
+ +
+
+ +
+
+
+
-
+ + +
+ + + +
+ +
-
-
-
-
-
-
-
-
-
-
-
-
-
4
+
+
+ +
+
+ +
+
+ +
+
+
+ + +
-
+
+ + +
-
-
+
+
-
-
-
-
-
-
-
-
-
-
-
-
5
+
+
+ +
+
+ +
+
+ +
+
+
+
+
+
+
+
+
-
-
-
-
+
+
-
-
-
-
-
-
-
-
-
-
-
-
6
+
+
+ +
+
+ +
+
+ +
+
+
+ + + +
-
+ -
d
+ +
-
+
+
-
-
-
-
-
-
-
-
-
-
-
-
7
+
+
+ +
+
+ +
+
+ +
+
+
-
-
d
-
d
+
-
-
-
+ +
+ +
+
-
-
-
-
-
-
-
-
-
d
-
-
-
8
+
+
+ +
+
+ +
+
+ +
+
+
-
-
+
-
+
+
-
-
+
+ +
+
-
-
-
-
-
-
-
-
-
-
-
-
9
+
+
+ +
+
+ + +
e
+ +
+
+
+ +
-
+ +
+ + +
-
- +
e
+
-
-
-
-
-
-
-
-
-
-
-
-
10
b
+
+
+ +
+
+ +
+
+ +
+
+
+ + +
-
+
+
- +
e
+
e
-
-
+
+
e
-
-
-
-
-
-
-
-
-
-
+
e
11
n/a
n/a
n/a
n/a
n/a
n/a
n/a
n/a
n/a
n/a
n/a
n/a
n/a
n/a
n/a
n/a
n/a
n/a
n/a
n/a
n/a
n/a
n/a
n/a
n/a
n/a
n/a
n/a
n/a
n/a
n/a
n/a
n/a
n/a
n/a
n/a
12
+
+
+ +
+
+ +
+
+ +
+
+
+ + +
-
-
+ +
-
-
-
+
+
-
-
-
-
-
-
-
-
-
-
-
-
13
+
+
+ +
+
+ +
+
+ +
+
+
-
-
+
-
-
+
-
-
-
+ +
+
-
-
-
-
-
-
-
-
-
-
-
-
USDA/FSIS – MLG 8.09
Lab
a
1
+
+
+ +
+
+ +
+
+ +
+
+
-
-
+ +
-
+
-
-
+
-
+
+
-
-
-
-
-
-
-
-
-
-
-
-
2
+
+
+ +
+
+ +
+
+ +
+
+
-
+ +
-
-
+ +
-
+
+ +
-
-
-
-
-
-
-
-
-
-
-
-
-
3
+
+
+ +
+
+ +
+
+ +
+
+
+ +
-
-
-
-
-
-
-
+ +
+
-
-
-
-
-
-
-
-
-
-
-
-
4
+
+
+ +
+
+ +
+
+ +
+
+
+ +
-
-
+
-
-
-
-
-
+
-
-
-
-
-
-
-
-
-
-
-
-
-
5
+
+
+ +
+
+ +
+
+ +
+
+
+
-
-
-
+
-
-
-
-
+
+
+
-
-
-
-
-
-
-
-
-
-
-
-
6
+
+
+ +
+
+ +
+
+ +
+
+
-
-
+ + +
+ + +
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
7
+
+
+ +
+
+ +
+
+ +
+
+
+
-
-
+ +
-
+ + +
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
8
+
+
+ +
+
+ +
+
+ +
+
+
-
-
-
-
-
+ + + +
+ +
+
-
-
-
-
-
-
-
-
-
-
-
-
9
+
+
+ +
+
+ +
+
+ +
+
+
-
-
+ + +
-
-
-
+
+ +
+
-
-
-
-
-
-
-
-
-
-
-
-
10
b
+
+
+ +
+
+ +
+
+ +
+
+
-
+
-
-
+
-
-
+
-
-
+
+
-
-
-
-
-
-
-
-
-
-
-
-
11
n/a
n/a
n/a
n/a
n/a
n/a
n/a
n/a
n/a
n/a
n/a
n/a
n/a
n/a
n/a
n/a
n/a
n/a
n/a
n/a
n/a
n/a
n/a
n/a
n/a
n/a
n/a
n/a
n/a
n/a
n/a
n/a
n/a
n/a
n/a
n/a
12
+
+
+ +
+
+ +
+
+ +
+
+
-
+
-
-
-
-
+
-
-
-
+
+
-
-
-
-
-
-
-
-
-
-
-
-
13
+
+
+ +
+
+ +
+
+ +
+
+
-
+ +
-
-
-
+
-
-
+ +
+
-
-
-
-
-
-
-
-
-
-
-
-
a
+ =
Listeria
species were detected in samples; -=
Listeria
species were not detected in sample; n/a- lab did not participate or submit data for the matrix;
b
Results were not used in statistical analysis due to laboratory error;
c
Listeria innocua
recovered from natural contamination of the sample.
d
Sample was presumptive positive on 3M MDA 2
Listeria
but
confirmed negative indicating a false positive result;
e
Sample was presumptive negative on 3M MDA 2
Listeria
but confirmed positive indicating a false negative result
1
2
3
4