Table 2.
Antimicrobial susceptibility testing results of the investigated S. equi subsp. zooepidemicus isolates.
| Antimicrobial compound | Range of observation (mg/L) | S23-21852 | S23-21854 | ||
|---|---|---|---|---|---|
| (mg/L) | Clinical category | (mg/L) | Clinical category | ||
| Ampicillin | 0.125–8 | ≤0.125 | S | ≤ 0.125 | S |
| Cefquinome | 2–4 | ≤2 | S | ≤ 2 | S |
| Ceftiofur | 0.125–4 | ≤0.125 | S | ≤ 0.125 | S |
| Cefazolin | 1–8 | ≤1 | S | ≤ 1 | S |
| Clindamycin | 0.125–2 | ≤0.125 | S | = 0.25 | S |
| Cefoxitin | 2–4 | ≤2 | S | ≤ 2 | S |
| Doxycycline | 0.125–8 | ≤0.125 | S | = 0.25 | S |
| Enrofloxacin | 0.0625–2 | = 2 | R | = 0.5 | I |
| Erythromycin | 0.125–4 | = 0.25 | S | ≤ 0.125 | S |
| Florfenicol | 1–8 | ≤1 | S | ≤ 1 | S |
| Gentamicin | 1–8 | = 4 | S | = 2 | S |
| Gentamicin (high level) | 500 | ≤500 | S | ≤ 500 | S |
| Neomycin | 8–16 | = 16 | I | = 16 | I |
| Nitrofurantoin | 32–64 | ≤32 | S | ≤ 32 | S |
| Oxacillin | 0.125–4 | ≤0.125 | S | ≤ 0.125 | S |
| Penicillin G | 0.125–8 | ≤0.125 | S | ≤ 0.125 | S |
| Rifampicin | 0.0625–4 | = 0.25 | S | = 0.25 | S |
| Trimethoprim/sulfmethoxazole | 0.25/4.75−4/76 | = 1/19 | S | = 1/19 | S |
| Tetracycline | 0.25–8 | = 4 | I | = 4 | I |
| Vancomycin | 0.5–16 | ≤0.5 | S | ≤ 0.5 | S |
S, susceptible; I, intermediate resistance; R, resistant.