TABLE 5.
Antimicrobial susceptibilities to combinatory compounds of Edwardsiella isolates analyzed in the current studya
| Antibiotic and MIC (mg/liter) | No. of strains with MIC by taxon: |
|||||
|---|---|---|---|---|---|---|
| All strains | E. anguillarum | E. hoshinae | E. ictaluri | E. piscicida | E. tarda | |
| Ampicillin-sulbactam | ||||||
| ≤4/2 | 47 | |||||
| 8/4 | ||||||
| ≥16/8 | ||||||
| Trimethoprim-sulfamethoxazole | ||||||
| ≤0.5/9.5 | 4 | 1 | 1 | 10 | ||
| 1/19 | ||||||
| 2/38 | 2 | 9 | ||||
| ≥4/76 | 1 | 8 | 1 | |||
| Ticarcillin-clavulanic acid | ||||||
| ≤8/2 | 47 | |||||
| 16/2 | ||||||
| 32/2 | ||||||
| ≥64/2 | ||||||
| Piperacillin-tazobactam | ||||||
| ≤8/4 | 47 | |||||
| 16/4 | ||||||
| 32/4 | ||||||
| 64/4 | ||||||
| ≥128/4 | ||||||
a
Antimicrobial susceptibilities were determined by the broth microdilution method using the Sensititre GN4F and Avian1F plates, following the manufacturer's protocol. Numbers in the lowest concentration of the antibiotic represents the maximal MIC at this concentration. An MIC higher than the highest concentration tested is cited in the subsequent higher concentration step.