Table 1. Comparison of the Degree of Sensitivity and Resistance Rate of S. infantis by two Methods of Disk Diffusion and Micro Dilution Tube a, b.
Antimicrobial Agent | MIC, µg/mL | MIC, % | DD, % | P Value | ||
---|---|---|---|---|---|---|
Range | MIC50 | MIC90 | R (N) | R (N) | ||
Nalidixic acid | 512-2048 | 614 | 2048 | 100 (50) | 100 (50) | NS |
Tetracycline | 8-64 | 16 | 32 | 94 (47) | 100 (50) | NS |
Streptomycin | 64- > 1024 | 512 | 1024 | 86 (43) | 100 (50) | 0.0012 |
Chloramphenicol | 8-256 | 64 | 128 | 72 (36) | 64 (32) | NS |
Trimethoprim | 512- > 2048 | 2048 | > 2048 | 100 (50) | 66 (33) | > 0.001 |
Ceftazidime | 0.01-8 | 0.5 | 1 | 20 (10) | 28 (14) | NS |
a Abbreviations: DD, Method of Disk Diffusion; MIC, Minimum Inhibitory Concentrations Method; MIC50, minimal concentration, inhibits 50% of analyzed strains; MIC90, minimal concentration, inhibits 90% of analyzed strains; NS, not significant.
b Data are presented in No. (%).