Population Diversity of Campylobacter jejuni in Poultry and Its Dynamic of Contamination in Chicken Meat
Table 4
Antimicrobials, dilution ranges, and cut-off values used for MIC determination of Campylobacter.
Antimicrobials
MIC breakpoints (µg/mL)
Distribution % of MIC (µg/mL)
MIC50 (µg/mL)
MIC90 (µg/mL)
Number of resistant isolates (%)
Number of resistant C. jejuni (%)
Number of resistant C. coli (%)
S
R
0.06
0.12
0.25
0.5
1
2
4
8
16
32
64
Chloramphenicol
≤8
≥32
76.5
21
1.2
0
1.3
2
4
9 (1.2%)
8 (1.71%)
1 (0.34%)
Ciprofloxacin
≤1
≥4
7.2
0.4
0
0.1
0
1.9
90.4
4
4
696 (90.4%)
424 (90.79%)
272 (93.15%)
Erythromycin
≤0.5
≥8
72
8.5
1.2
0.4
0.3
0.5
17.1
0.5
32
139 (18%)
29 (6.20%)
110 (41.98%)*
Gentamicin
≤4
≥16
39
14.3
31
13.3
1.6
0.2
0.3
0.3
0.25
1
2 (0.3%)
2 (0.42%)
0
Nalidixic acid
≤16
≥32
6.6
0.7
0.7
1.6
8.4
82
64
64
697 (90%)
428 (91.64%)
269 (92.12%)
Streptomycin
≤2
≥8
66.5
18.2
14.3
0.4
0.6
1
4
8 (1%)
7 (0.14%)
1 (0.34%)
Tetracycline
≤4
≥16
33
1.3
0.2
0.5
0.2
0.8
64
16
16
492 (64%)
272 (58.24%)
220 (75.34%)**
S = sensible, R = resistant. *Statistically significant versus C. jejuni group ( < 0.05, test), **statistically significant versus C. jejuni group ( ≤ 0.01, test).
