Table 2.
Results of antibiotic sensitivity testing for APEC isolates.
| Antibiotic a | APEC Isolates (Code No.) | % of Isolates b | ||||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 9 | 16 | 41 | 50 | 28 | 54 | 5 | 2 | 7 | 39 | 15 | 32 | 49 | R | I | S | |
| Ampicillin | R | R | R | R | R | R | R | R | R | R | R | R | R | 100 | 0 | 0 |
| Amoxycillin–clavulanic acid | R | R | R | R | R | R | R | R | R | R | R | R | R | 100 | 0 | 0 |
| Cefotaxime | R | I | I | R | R | R | R | R | I | R | S | R | I | 61.54 | 30.77 | 7.69 |
| Colistin | R | R | R | R | R | R | R | R | R | R | S | R | R | 92.31 | * | 7.69 |
| Tetracyclines | R | R | R | R | R | R | R | R | R | R | R | R | R | 100 | 0 | 0 |
| Doxycycline | S | R | R | R | R | R | R | I | R | R | R | R | R | 84.62 | 7.69 | 7.69 |
| Gentamicin | R | S | R | R | S | S | S | R | R | S | S | R | R | 53.85 | 0 | 46.15 |
| Neomycin | R | I | R | I | S | R | I | I | R | I | I | R | I | 38.46 | 53.85 | 7.69 |
| Spiramycin | R | R | I | R | R | R | I | R | R | R | R | R | R | 84.62 | 15.38 | 0 |
| Florfenicol | R | I | R | R | R | R | S | S | R | S | R | R | R | 69.23 | 7.69 | 23.7 |
| Ofloxacin | I | S | S | R | I | S | R | R | R | S | S | S | S | 30.77 | 15.38 | 53.85 |
| Enrofloxacin | R | S | S | R | R | S | R | R | R | S | S | S | S | 46.15 | 0 | 53.85 |
| Ciprofloxacin | R | I | S | R | R | I | R | R | R | S | S | I | R | 53.84 | 23.08 | 23.08 |
a Oxoid Laboratories, Basingstoke, Hampshire, England, and Lot No. 2230562. b R: resistant, I: intermediate sensitive, and S: sensitive to antibiotics, according to [22]. * Zone diameters for colistin were interpreted according to what was suggested by [23] as {R ≤ 11 mm, S ≥14 mm, as well as 12–13 mm, were considered susceptible}.