330-331 / 1195
Revised Mar 2014
20
Table 2. Individual Collaborator Results for Raw Ground Beef
a
, (25 g Test Portions)
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
Salmonella
d
Lab
1
+
+
+
+
+
+
+
+
+
+
+
+
-
+
-
-
-
+
+
+
+
-
+
+
-
-
-
-
-
-
-
-
-
-
-
-
2
+
+
+
+
+
+
+
+
+
+
+
+
+
-
-
+
-
+
+
+
-
-
-
+
-
-
-
-
-
-
-
-
-
-
-
-
3
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
4
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
5
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
6
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
7
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
8
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
9
+
+
+
+
+
+
+
+
+
+
+
+
+
-
+
+
-
c
+
+
+
+
-
-
-
c
-
-
-
-
-
-
-
-
-
-
-
-
10
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
-
+
+
+
-
-
-
+
-
-
-
-
-
-
-
-
-
-
-
-
-
11
+
+
+
+
+
+
+
+
+
+
+
+
+
+
-
-
-
-
-
-
+
+
+
+
-
-
-
-
-
-
-
-
-
-
-
-
12
b
+
+
+
+
+
+
+
+
+
+
+
+
-
+
+
+
-
c
-
c
-
c
+
+
+
-
c
-
-
-
-
c
-
c
-
c
-
c
-
-
c
-
-
c
-
-
c
13
+
+
+
+
+
+
+
+
+
+
+
+
-
+
-
-
-
+
+
-
+
+
+
+
-
-
-
-
-
-
-
-
-
-
-
-
14
+
+
+
+
+
+
+
+
+
+
+
+
-
-
+
+
+
+
+ -
-
+
-
+
-
-
-
-
-
-
-
-
-
-
-
-
15
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
-
-
-
+
-
-
-
-
-
-
-
-
-
c
-
-
-
-
-
16
b
+
+
+
+
+
+
+
+
+
+
+
+
-
c
-
+
+
-
-
+ +
+
+
+
+
-
-
-
-
-
-
-
c
-
c
-
c
-
c
-
-
17
+
+
+
+
+
+
+
+
+
+
+
+
-
-
-
+
-
+
+ +
-
-
+
-
-
-
-
-
-
-
-
-
-
-
-
-
18
b
+
+
+
+
+
+
+
+
+
+
+
+
-
c
+
+
+
-
c
+
+ -
c
+
+
-
c
+
-
c
+
-
c
-
c
-
c
-
c
-
c
-
c
-
c
-
c
-
c
+
19
b
+
+
+
+
+
+
+
+
+
+
+
+
-
-
-
-
+
-
+ +
-
+
-
c
-
-
-
-
c
-
c
-
c
-
c
-
-
c
-
c
-
c
-
c
-
c
20
+
+
+
+
+
+
+
+
+
+
+
+
+
-
-
+
+
-
+ +
-
+
+
+
-
-
-
-
-
-
-
-
-
-
-
-
USDA/FSIS-MLG
d
Lab
1
+
+
+
+
+
+
+
+
+
+
+
+
-
+
-
+
-
+
+
+
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
2
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
-
-
+
+
+
+
-
-
-
-
-
-
-
-
-
-
-
-
-
3
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
4
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
5
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
6
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
7
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
8
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
9
+
+
+
+
+
+
+
+
+
+
+
+
+
-
-
+
+
+
-
+
-
+
+
+
-
-
-
-
-
-
-
-
-
-
-
-
10
+
+
+
+
+
+
+
+
+
+
+
+
-
-
-
+
-
+
-
-
+
+
+
+
-
-
-
-
-
-
-
-
-
-
-
-
11
+
+
+
+
+
+
+
+
+
+
+
+
+
-
+
+ -
+
-
-
+
+
+
-
-
-
-
-
-
-
-
-
-
-
-
-
12
b
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
-
-
-
+
+
+
+
+
+
+
-
-
-
-
-
-
-
+
-
-
-
13
+
+
+
+
+
+
-
+
+
+
+
+
+
-
-
+
-
+
+
+
-
-
-
+
-
-
-
-
-
-
-
-
-
-
-
-
14
+
+
+
+
+
+
+
+
+
+
+
+
+
-
+
+
+
+
+
+
-
-
+
-
-
-
-
-
-
-
-
-
-
-
-
-