Table 1.
Sensitivity of E. coli O157:H7 to different antibiotics.
| Antibiotics | Disk content (μg/ml) |
E. coli O157:H7 (ATCC 1659) |
E. coli O157:H7 (ATCC 6933) |
||
|---|---|---|---|---|---|
| Inhibition zone (mm) | Interpretive standard of (I.Z) | Inhibition zone (mm) | Interpretive standard of (I.Z) | ||
| Penicillin | 10 | 11.3 | R | 10.0 | R |
| Ampicillin | 10 | 15.5 | I | 17.8 | S |
| Amoxicillin + clavulanic acid | 30 | 12.5 | R | 15.5 | I |
| Cephalexin g1 | 30 | 11.5 | R | 12.8 | R |
| Ceftriaxone g3 | 30 | 12.7 | R | 14.5 | R |
| Cefaclor g2 | 30 | N.I | R | 10.5 | R |
| Ceftazidime g3 | 30 | N.I | R | 9.5 | R |
| Rifampicin | 5 | 16.25 | I | 19.5 | S |
| Vancomycin | 30 | 9.0 | R | 17.5 | S |
| Azithromycin | 15 | 10.5 | R | 13.0 | S |
| Amikacin | 10 | 15.5 | I | 13.5 | I |
| Gentamicin | 10 | 15.5 | S | 17.0 | S |
| Oxytetra acid | 10 | 10.5 | R | 22.0 | S |
| Doxycycline | 30 | 10.7 | I | 13.0 | I |
| Colistin | 10 | 8.0 | S | 16.0 | S |
| Sulfamethoxazole | 30 | 13.5 | I | 15.0 | I |
| Cidocetine | 30 | 10.2 | R | 10.7 | R |
| Ciprofloxacin | 5 | 12.0 | R | 22.0 | S |
| Levofloxacin | 5 | N.I | R | 8.50 | R |
| Nitrofurantoin | 30 | 4.5 | R | 6.5 | R |
R, Resistant; I, Intermediate; S, Sensitive; CLSI, Clinical Laboratory Standards Institute; EUCAST, European Committee on Antimicrobial Susceptibility Testing; BSAC, Britch Society for Antimicrobial chemotherapy; N.I, No Inhibition.