Table 2.
Antimicrobial resistance patterns of 593 Escherichia coli isolated from calf or cow feces or manure pit of 101 dairy farms in Québec Canada.
| Antimicrobial pattern | Number of isolates (%) |
|---|---|
| Pan-Susceptible | 414 (69.8) |
| TET | 24 (4.0) |
| SPT | 4 (0.7) |
| FOX | 3 (0.5) |
| CHL | 2 (0.3) |
| STR | 1 (0.2) |
| FIS | 1 (0.2) |
| AMP | 1 (0.2) |
| FIS, SXT | 1 (0.2) |
| GEN, SPT | 1 (0.2) |
| FIS, TET | 4 (0.7) |
| AMP, TET | 2 (0.3) |
| AMP, STR | 1 (0.2) |
| FOX, CHL | 1 (0.2) |
| AZM, FIS | 1 (0.2) |
| AMP, FIS | 1 (0.2) |
| AMP, TIO, CRO | 1 (0.2) |
| STR, FIS, TET MDR | 16 (2.7) |
| NEO, FIS, TET MDR | 1 (0.2) |
| AMP, SPT, TET MDR | 1 (0.2) |
| AMP, GEN, TET MDR | 1 (0.2) |
| AMP, CHL, FIS MDR | 1 (0.2) |
| AMP, FIS, TET MDR | 1 (0.2) |
| AMC, AMP, FOX MDR | 1 (0.2) |
| SPT, STR, FIS, TET MDR | 3 (0.5) |
| SPT, FIS, TET, SXT MDR | 2 (0.3) |
| NEO, STR, FIS, TET MDR | 2 (0.3) |
| AMP, STR, FIS, SXT MDR | 2 (0.3) |
| AMP, SPT, FIS, SXT MDR | 1 (0.2) |
| AMP, NEO, STR, FIS MDR | 1 (0.2) |
| AMP, TIO, CRO, TET MDR | 1 (0.2) |
| CHL, STR, FIS, TET MDR | 11 (1.9) |
| AMP, CHL, FIS, TET MDR | 1 (0.2) |
| NEO, STR, FIS, TET, SXT MDR | 1 (0.2) |
| AMP, GEN, STR, FIS, SXT MDR | 1 (0.2) |
| AMP, STR, FIS, TET, SXT MDR | 6 (1.0) |
| CHL, NEO, STR, FIS, TET MDR | 3 (0.5) |
| AMP, SPT, STR, FIS, TET MDR | 2 (0.3) |
| AMP, NEO, STR, FIS, TET MDR | 2 (0.3) |
| AMP, SPT, FIS, TET, SXT MDR | 1 (0.2) |
| CHL, STR, FIS, TET, SXT MDR | 1 (0.2) |
| AMP, NEO, SPT, FIS, TET MDR | 1 (0.2) |
| AMP, CHL, STR, FIS, TET MDR | 3 (0.5) |
| AMP, CHL, SPT, FIS, TET MDR | 1 (0.2) |
| NEO, SPT, STR, FIS, TET, SXT MDR | 4 (0.7) |
| CHL, SPT, STR, FIS, TET, SXT MDR | 4 (0.7) |
| AMP, NEO, STR, FIS, TET, SXT MDR | 3 (0.5) |
| AMP, SPT, STR, FIS, TET, SXT MDR | 1 (0.2) |
| AMP, CHL, STR, FIS, TET, SXT MDR | 1 (0.2) |
| AMP, NEO, SPT, STR, FIS, TET, SXT MDR | 2 (0.3) |
| AMP, TIO, CRO, SPT, STR, FIS, SXT MDR | 1 (0.2) |
| AMP, CHL, SPT, STR, FIS, TET, SXT MDR | 4 (0.7) |
| AMP, CHL, NEO, STR, FIS, TET, SXT MDR | 4 (0.7) |
| AMP, AZM, SPT, STR, FIS, TET, SXT MDR | 2 (0.3) |
| AMC, AMP, GEN, NEO, STR, FIS, TET MDR | 1 (0.2) |
| CHL, DAN, NAL, SPT, STR, FIS, TET MDR | 1 (0.2) |
| AMP, NAL, NEO, STR, FIS, TET, SXT MDR | 1 (0.2) |
| AZM, CHL, SPT, STR, FIS, TET, SXT MDR | 1 (0.2) |
| AZM, CHL, NEO, STR, FIS, TET, SXT MDR | 1 (0.2) |
| AMP, CHL, GEN, SPT, STR, FIS, TET MDR | 1 (0.2) |
| AMC, AMP, CHL, NEO, SPT, FIS, TET MDR* | 1 (0.2) |
| DAN, ENR, NEO, SPT, STR, FIS, TET, SXT MDR | 1 (0.2) |
| AMP, CHL, NEO, SPT, STR, FIS, TET, SXT MDR | 4 (0.7) |
| AZM, CHL, NEO, SPT, STR, FIS, TET, SXT MDR | 2 (0.3) |
| AMP, AZM, NEO, SPT, STR, FIS, TET, SXT MDR | 1 (0.2) |
| AMP, AZM, CHL, NEO, STR, FIS, TET, SXT MDR* | 2 (0.3) |
| AMP, AZM, CHL, NEO, SPT, FIS, TET, SXT MDR* | 1 (0.2) |
| AMC, AMP, FOX, GEN, NEO, SPT, FIS, TET, SXT MDR* | 1 (0.2) |
| AMP, AZM, TIO, CRO, SPT, STR, FIS, TET, SXT MDR* | 1 (0.2) |
| AMC, AMP, FOX, TIO, CRO, NEO, STR, FIS, TET MDR* | 1 (0.2) |
| AMC, AMP, FOX, TIO, CRO, SPT, STR, FIS, TET, SXT MDR* | 1 (0.2) |
| AMC, AMP, FOX, TIO, CRO, NEO, STR, FIS, TET, SXT MDR* | 1 (0.2) |
| AMC, AMP, FOX, CRO, CHL, SPT, STR, FIS, TET, SXT MDR* | 2 (0.3) |
| AMC, AMP, FOX, CRO, CHL, NEO, STR, FIS, TET, SXT MDR* | 1 (0.2) |
| AMC, AMP, FOX, TIO, CRO, CHL, STR, FIS, TET, SXT MDR* | 1 (0.2) |
| AMP, AZM, TIO, CRO, GEN, NEO, SPT, STR, FIS, TET, SXT MDR* | 1 (0.2) |
| AMC, AMP, CHL, DAN, ENR, NAL, SPT, STR, FIS, TET, SXT MDR* | 1 (0.2) |
| AMP, FOX, TIO, CRO, CHL, NEO, SPT, STR, FIS, TET, SXT MDR* | 1 (0.2) |
| AMC, AMP, FOX, TIO, CRO, CHL, SPT, STR, FIS, TET, SXT MDR* | 1 (0.2) |
| AMC, AMP, FOX, CRO, CHL, NEO, SPT, STR, FIS, TET, SXT MDR* | 1 (0.2) |
| AMC, AMP, FOX, TIO, CRO, CHL, NEO, STR, FIS, TET, SXT MDR* | 1 (0.2) |
| AMC, AMP, FOX, TIO, CRO, CHL, NEO, SPT, STR, FIS, TET, SXT MDR* | 1 (0.2) |
| AMC, AMP, CHL, DAN, ENR, GEN, NAL, NEO, SPT, STR, FIS, TET, SXT MDR* | 1 (0.2) |
| AMC, AMP, AZM, FOX, TIO, CRO, CHL, GEN, NEO, SPT, STR, FIS, TET, SXT MDR* | 1 (0.2) |
MDR
Multidrug resistance was defined by resistance to three or more antimicrobial classes.
*
Pattern resistant to six or more antimicrobial classes.
AMC, amoxicillin-clavulanic acid; AMP, ampicillin; AZM, azithromycin; CHL, chloramphenicol; CRO, ceftriaxone; DAN, danofloxacin; ENR, enrofloxacin; FIS, sulfisoxazole; FOX, cefoxitin; GEN, gentamicin; NAL, nalidixic acid; NEO, neomycin; SPT, spectinomycin; STR, streptomycin; SXT, trimethoprim-sulfamethoxazole; TET, tetracycline; TIO, ceftiofur.