Table 2.
Characteristics of the studied strains.
| Strains | PGG | O and F antigens and ST | Resistances | Resistance determinants | Virulence or marker genes |
|---|---|---|---|---|---|
| 12-246M | A | O141 F18 ST-10 |
CST SMX TMP TET CHL AMP GEN |
mcr-1 (deletion in pmrB gene)a sul1, sul2 dfrA1 tetA catA1 blaTEM-1a aph3’1c, aac3IIa, aadA1, strA, strB |
fedA, fedF, gad, hlyA, iha, iss, orfA, orfB, paa, stx2, terE, ureD |
| 12-269M | A | O149 F4 ST-100 |
CST SMX TMP TET CHL AMP GEN |
mcr-1, (mutations in PhoQ and PhoP)a sul1, sul2, sul3 dfrA1 tetA cat, cmlA1 blaTEM-1a aac(3)-IIa, aac(3)-IVa, aadA1, aadA3, aph(3')-Ia, aph(4)-Ia, strA, strB |
astA, capU, esc1763 (317/408 nt), gad, hlyA, iha, K88ab, ltcA, sta1, stb, terE, ureD |
| 13-220M | E | O139 F18 ST-1 |
CST SMX TMP TET AMP |
mcr-1, (mutations in PmrB and PhoQ)a sul1, sul2, sul3 dfrA1 tetA blaTEM-1b aadA1, aadA24, strA, strB |
AIDA (94.5% identity), eilA, esc1763 (317/408 nt), fedA, fedF, gad, hlyA, lpfA, orfA, orfB, stx2, terE |
PGG: phylogenetic group (Clermont et al., 2013); CST: colistin; SMX: sulfamethoxazole; TMP: trimethoprim; TET: tetracycline; CHL: chloramphenicol; AMP: ampicillin; GEN: gentamicin; AA: amino acid.
a
as determined previously, impact on colistin resistance unknown (Delannoy et al., 2017).