Table 3.
Frequent resistance patterns in E. coli isolated from healthy cattle between 2010 and 2020 in Korea (n = 2733).
| No. of Antimicrobials |
Total No. of Isolates (%) |
Most Common Pattern (No. of Isolates) |
|---|---|---|
| 0 | 1426 (52.2) | - |
| 1 | 233 (8.5) | TET (n = 122) |
| 2 | 603 (22.1) | STR TET (n = 556) |
| 3 | 219 (8.0) | NAL STR TET (n = 72) |
| 4 | 110 (4.0) | AMP CHL STR TET (n = 52) |
| 5 | 59 (2.2) | AMP CHL STR TET SXT (n = 22) |
| 6 | 40 (1.5) | AMP CHL GEN STR TET SXT (n = 10) |
| AMP CHL NAL STR TET SXT (n = 10) | ||
| 7 | 25 (0.9) | AMP CHL CIP NAL STR TET SXT (n = 15) |
| 8 | 13 (0.5) | AMP CHL CIP GEN NAL STR TET SXT (n = 11) |
| 9 | 2 (0.1) | AMP XNL CHL CIP GEN NAL STR TET SXT (n = 2) |
| 10 | 2 (0.1) | AMP FOX XNL CHL CIP GEN NAL STR TET SXT (n = 2) |
| 11 | 1 (0.04) | AMC AMP FOX XNL CHL CIP GEN NAL STR TET SXT (n = 1) |
Abbreviations: AMC, amoxicillin/clavulanic acid; AMP, ampicillin; CHL, chloramphenicol; CIP, ciprofloxacin; COL, colistin; FOX, cefoxitin; GEN, gentamicin; NAL, nalidixic acid; STR, streptomycin; SXT, trimethoprim/sulfamethoxazole; TET, tetracycline; XNL, ceftiofur).