Table 1.
Pheno- and genotypic characterization of E. coli isolated from calves.
| Sample Number | Resistance Phenotype | Genotype | Phylotype | Virulence Associated Genes |
|---|---|---|---|---|
| K32a * | ESBL, TET, SXT | blaCTX-M-1/15, blaTEM, tet(A), dfrA1, sul2, aadA1, aadA2 | B1 | fimH1, fimH2 |
| K59 | ESBL, SXT | blaCTX-M-1/15, blaTEM, dfrA14, sul2 | A | fimH1, fimH2 |
| K32b * | ESBL, TET, SXT | blaCTX-M1/15, aadA1, aadA2, tet(A), sul2, dfrA1 | B1 | fimH1, fimH2, |
| K63 * | ESBL, CIP, GEN, TET, SXT, CHL | blaCTX-M1/15, blaTEM, aadA1, aadA2, aphA, tet(A), sul2, sul3, dfrA12, cmlA1, floR | A | fimH1 |
| K42 * | ESBL, TET, SXT | blaCTX-M1/15, blaTEM, aadA1, aadA2, tet(A), sul2, dfrA1 | B1 | fimH1, fimH2, papC1, papC2, iucD1, iucD2 |
| K64 * | ESBL, TET, SXT | blaCTX-M1/15, aadA4, tet(A), sul2, dfrA17 | B1 | fimH1, fimH2, papC1, papC2, iucD1, iucD2 |
| K47 * | ESBL, TET, SXT | blaCTX-M1/15, blaTEM, aadA1, aadA2, tet(A), sul2, dfrA1, dfrA5 | B1 | fimH1, fimH2, papC1, papC2, iucD1, iucD2 |
| K75 * | ESBL, CIP, TET, SXT, CHL | blaCTX-M1/15, blaTEM, aadA4, tet(A), tet(B), dfrA17, cat | B1 | fimH1, fimH2, papC1, papC2, iucD1, iucD2 |
| K48 * | ESBL, TET, SXT | blaCTX-M1/15, blaTEM, aadA1, aadA2, tet(A), sul2, dfrA1, dfrA5 | B1 | fimH1, fimH2, papC1, papC2, iucD1, iucD2 |
| K89 | ESBL, SXT | blaCTX-M1/15, blaTEM, sul2, dfrA14 | A | fimH1, fimH2 |
| K50 | ESBL | blaCTX-M9, blaTEM, dfrA14 | E clades | fimH1, fimH2 |
| K95 * | ESBL, CIP, SXT, CHL | blaCTX-M1/15, aadA1, aadA2, tet(A), sul3, dfrA12, cmlA1 | B1 | fimH1, hlyA-var2 |
| K51 * | ESBL, CIP, TET, SXT, CHL | blaCTX-M1/15, blaTEM, tet(A), sul2, dfrA14, floR | A | fimH1, fimH2 |
| K99 | ESBL, SXT | blaCTX-M1/15, blaTEM, sul2, dfrA14 | A | fimH1, fimH2, papC1, papC2, iucD1, iucD2 |
| K52 | ESBL, SXT | blaCTX-M1/15, blaTEM, sul2, dfrA14 | A | fimH1, fimH2 |
| K1 * | ESBL, CIP, GEN, TET, SXT, CHL | blaCTX-M1/15, aadA1, aadA2, aphA, tet(A), sul1, dfrA1, dfrA5 | A | fimH1, hlyA-var2 |
| K6 * | AmpC, ESBL, CIP, GEN, TET, SXT, CHL | blaCTX-M1/15, blaTEM, blaACT, tet(A), tet(B), sul1, sul2, dfrA5, dfrA7, dfrA17 | B1 | fimH1, fimH2 |
| K24 * | ESBL, TET, SXT | blaCTX-M1/15, blaTEM, aadA1, aadA2, tet(A), sul2, dfrA1 | B1 | fimH1, fimH2 |
| K87 * | ESBL, CIP, TET, SXT, CHL | blaCTX-M9, blaTEM, dfrA14, floR | A | fimH1, fimH2 |
| K98 | ESBL, SXT | blaCTX-M1/15, blaTEM, sul2, dfrA14 | A | fimH1, fimH2 |
| K100 | ESBL, SXT | blaCTX-M1/15, blaTEM, sul2, dfrA5, dfrA14 | A | fimH1, fimH2 |
| K101 | ESBL, SXT | blaCTX-M1/15, blaTEM, sul2, dfrA5, dfrA14 | A | fimH1, fimH2 |
Abbreviations: CHL, chloramphenicol; CIP, ciprofloxacin; ESBL, Extended-spectrum lactamase phenotype, i.e., resistance to penicillins and cephalosporins of first to third generations; GEN, gentamicin; TET, tetracycline; SXT, trimethoprim–sulfamethoxazole; * MDR, multidrug-resistant.