| | | |
Hygiene indicators
|
Pathogen indicator
|
|---|
| | | |
E. coli
(mean and stdv)
|
Number of samples per
E. coli
counts
|
Salmonella
|
E. coli
O157:H7
|
|---|
|
CSL
|
Sample
|
n
| |
<1.0 log
|
≥1.0 and < 2.0 log
|
≥2.0 and < 3.0 log
|
A/P*
|
A/P*
|
|
1
|
Manure
|
9
|
1.11 ± 0.33 cfu/g
|
8
|
0
|
1
|
A
|
A
|
|
2
|
Manured soil
|
9
|
<1.00 ± 0.00 cfu/g
|
9
|
0
|
0
|
A
|
A
|
|
3
|
Soil
|
27
|
1.05 ± 0.20 cfu/g
|
23
|
3
|
1
|
A
|
A
|
|
4
|
Seedlings in soil
|
3
|
1.43 ± 0.75 cfu/g
|
2
|
0
|
1
|
A
|
A
|
|
5
|
Seedlings
|
3
|
1.00 ± 0.00 cfu/g
|
2
|
1
|
0
|
A
|
A
|
|
6
|
Lettuce
|
27
|
1.06 ± 0.22 cfu/g
|
23
|
3
|
1
|
A
|
A
|
|
7
|
Lettuce after washing
|
6
|
1.00 ± 0.00 cfu/g
|
5
|
1
|
0
|
A
|
A
|
|
8
|
Rinse water
|
2
|
1.00 ± 0.00 MPN/100 ml
|
2
|
0
|
0
|
A
|
A
|
|
9
|
Irrigation water source
|
12
|
1.03 ± 0.012 MPN/100 ml
|
10
|
2
|
0
|
A
|
A
|
|
10
|
Irrigation water from tap
|
12
|
1.04 ± 0.12 MPN/100 ml
|
10
|
1
|
1
|
A
|
A
|
|
11
|
Swab of farmers’ hands
|
9
|
1.00 ± 0.00 cfu/25 cm2
|
9
|
0
|
0
|
-
|
-
|
|
12
|
Swab of transport boxes of lettuce
|
9
|
1.00 ± 0.01 cfu/25 cm2
|
9
|
0
|
0
|
-
|
-
|
|
Total
|
128
| |
112
|
11
|
5
|
-
|
-
|
- * A: absent in 25 g or 25 ml; P: presence in 25 g or 25 ml; stdv: standard deviation.
