Trends of Antibiotic Resistance in Mesophilic and Psychrotrophic Bacterial Populations during Cold Storage of Raw Milk
Table 1
“Total counts” §on Mueller-Hinton agar and R values *.
Experiments
I
II
III
Temperature
4°C
6°C
4°C
Samples
log CFU/mL
R
a
log CFU/mL
R
log CFU/mL
R
Day 0
Day 4
Day 0
Day 4
Day 0
Day 2
Day 4
1
1.01
7
0.80
13
1.00
2
0.94
8
0.76
14
0.76
3
1.09
9
0.77
15
0.93
4
0.79
10
0.90
16
0.90
5
0.92
11
0.92
17
0.76
6
0.82
12
0.77
18
0.92
§Bacteria were enumerated after 3 days incubation at 30°C.
*The R value corresponds to the number of psychrotrophs divided by the number of mesophiles retrieved at day 0.
