Table 1.
Sequence type (ST), plasmid, and resistance genes of the isolates.
| Isolate | ST | ST complex | Plasmid carrying mcr-1a | Other resistance genesb |
||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Aminoglycoside | β-lactam | Quinolone | Fosfomycin | MLSc | Phenicol | Sulphonamide | Tetracycline | Trimethoprim | ||||
| WCHEC1604 | 1196 | 446 | IncX4, 31,229 IncI2, 62,098 |
strA, strB, aac(3)-IId, aadA2, aadA1 |
blaCTX-M-14, blaTEM-1b |
oqxB, oqxA | fosA |
lnu(F), mph(A) |
cmlA1, floR |
sul1, sul3 | tet(M) | dfrA12 |
| WCHEC1606 | 7087 | 165 | IncX4, 33,309 |
aac(3)-IId, strA, strB, aadA22 |
blaCTX-M-14, blaTEM-1b |
qnrS1 | Mph(A) | floR | sul2 | tet(B) | dfrA14 | |
| WCHEC1609 | 10 | 10 | aph(4)-Ia, aph(3′)-Ia, aac(3)-IVa, aadA2, aadA1 |
blaCTX-M-55, blaTEM-1b, blaCMY -2 |
oqxA, oqxB | fosA | mef(B) |
floR, cmlA1 |
sul3 | tet(A) | dfrA12 | |
| WCHEC1613 | 48 | 10 | IncHI2, IncN 300,307 |
aadA1, aph(4)-Ia, aac(3)-IVa, aadA2, aph(3′)-Ia, strA, strB |
blaTEM-1b, blaCTX-M-14 |
oqxB, oqxA qnrS1 |
fosA | mph(A) | cmlA1 |
sul1, sul2, sul3 |
dfrA14, dfrA12 |
|
| WCHEC1614 | 34 | 10 | aph(3′)-Ia, aadA2, aadA1 | blaTEM-1b | mef(B) |
floR, cmlA1 |
sul3 | tet(A) | dfrA12 | |||
| WCHEC1618 | 34 | 10 | IncX4, 33,309 |
aph(3′)-Ia, aadA2, aadA1 | blaTEM-1b | qnrS1 |
cmlA1, floR |
sul3 | tet(A) | dfrA12 | ||
| WCHEC1622 | 7086 | 155 | IncP, 49,897 |
strB, strA | blaTEM-1b, blaCTX-M-125 | qnrS1 | floR | sul2 | tet(A) | dfrA14 | ||
aReplicon type and size of plasmids are shown.
bResistance genes that were located on plasmids carrying mcr-1 are underlined.
cMLS: macrolide, lincosamide, and streptogramin B.