Table 1.
Microbiological resistance (percentage) and distribution of minimum inhibitory concentrations (MICs) for the 109 C. jejuni and 34 C. coli isolates.
| Antimicrobial Class | Antimicrobial Agent | Campylobacter Species | % Resistance | No. of Isolates at the Indicated MIC (mg/L) | |||||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| TOTAL | Beef Cattle | Dairy Cattle | Sheep | 0.064 | 0.125 | 0.25 | 0.5 | 1 | 2 | 4 | 8 | 16 | 32 | 64 | 128 | 256 | |||
| Aminoglycoside | Gentamicin | C. jejuni | 0.0 | 0.0 | 0.0 | 0.0 | 3 | 12 | 87 | 7 | |||||||||
| C. coli | 11.8 | 0.0 | 44.4 | 0.0 | 15 | 11 | 4 | 4 | |||||||||||
| Aminoglycoside | Streptomycin | C. jejuni | 3.7 | 4.8 | 2.7 | 3.3 | 1 | 17 | 84 | 3 | 4 | ||||||||
| C. coli | 67.7 | 60.0 | 88.9 | 60.0 | 8 | 3 | 5 | 1 | 17 | ||||||||||
| Macrolide | Erythromycin | C. jejuni | 0.0 | 0.0 | 0.0 | 0.0 | 109 | ||||||||||||
| C. coli | 8.8 | 0.0 | 33.3 | 0.0 | 31 | 3 | |||||||||||||
| Quinolone | Nalidixic acid | C. jejuni | 60.6 | 61.9 | 67.6 | 50.0 | 1 | 31 | 11 | 6 | 60 | ||||||||
| C. coli | 64.7 | 80.0 | 77.8 | 55.0 | 3 | 9 | 3 | 19 | |||||||||||
| (Fluoro)Quinolone | Ciprofloxacin | C. jejuni | 60.6 | 61.9 | 67.6 | 50.0 | 43 | 1 | 41 | 24 | |||||||||
| C. coli | 64.7 | 80.0 | 77.8 | 55.0 | 11 | 1 | 6 | 9 | 7 | ||||||||||
| Tetracycline | Tetracycline | C. jejuni | 38.5 | 42.9 | 43.2 | 26.7 | 67 | 2 | 2 | 6 | 23 | 9 | |||||||
| C. coli | 76.5 | 80.0 | 88.9 | 70.0 | 8 | 3 | 2 | 21 | |||||||||||
White fields denote range of dilutions tested for each antimicrobial agent. MICs above the range are given as the concentration closest to the range. MICs equal to or lower than the lowest concentration tested are given as the lowest tested concentration. Vertical lines indicate European Committee for Antimicrobial Susceptibility Testing (EUCAST) epidemiological cut-off values.