Table 4.
Comparison of antimicrobial resistance of Campylobacter spp. identified by disk diffusion and broth microdilution methods.
| Antimicrobial agent | Disk diffusion | Broth microdilution | Agreement between methods | |||||||
|---|---|---|---|---|---|---|---|---|---|---|
| No. of isolates | % of resistant isolates | No. of isolates | % of resistant isolates | |||||||
| S | I | R | S | I | R | Correlation coefficient | Kappa values | |||
| AMINOGLYCOSIDES | ||||||||||
| Gentamicin | 65 | 44 | 2 | 1.80% | 54 | 43 | 14 | 12.61% | 0.0043 | 0.226 |
| Streptomycin | 9 | 29 | 73 | 65.77% | 7 | 21 | 83 | 74.77% | 0.5671 | 0.898 |
| β- LACTAM | ||||||||||
| Ampicillin | 13 | 20 | 78 | 70.27% | 10 | 17 | 84 | 75.68% | 0.7390 | 0.997 |
| MACROLIDES | ||||||||||
| Azithromycin | 48 | 48 | 15 | 13.51% | – | – | – | – | – | – |
| Erythromycin | 27 | 38 | 46 | 41.44% | 28 | 29 | 54 | 48.65% | 0.4196 | 0.695 |
| Tylosin | – | – | – | – | 7 | 61 | 43 | 38.74% | – | – |
| QUINOLONES | ||||||||||
| Ciprofloxacin | 62 | 33 | 16 | 14.41% | 78 | 25 | 8 | 7.21% | 0.3596 | 0.739 |
| Nalidixic acid | 40 | 27 | 44 | 39.64% | – | – | – | – | – | – |
| PHENICOL | ||||||||||
| Chloromphenicol | 77 | 29 | 5 | 4.50% | – | – | – | – | – | – |
| TETRACYCLINE | ||||||||||
| Tetracycline | 48 | 42 | 21 | 18.92% | 33 | 56 | 22 | 19.82% | 0.8566 | 0.999 |
S, susceptible; I, intermediate; R, resistance. MIC and zone of inhibition breakpoints are listed in Kashoma et al. (2015).