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Table 3 Putative FQ resistance mutations and mutation rate

From: The prevalence and mechanism of fluoroquinolone resistance in Escherichia coli isolated from swine farms in China

NO of isolates and DANO MIC (μg/mL)

Topoisomerases and gyrase mutations

Efflux-related mutations

gyrA

parC

parE

marR

acrR

13 (128); 2 (64);

S83L, D87N

None

None

None

None

2 (128); 1 (64)

S83L, D87N

S80I

None

None

None

5 (128); 3 (64)

S83L, D87N

S80I

None

G103S

None

2 (128); 1 (32)

S83L, D87N

None

None

G103S

None

2 (128); 1 (32); 2 (8)

None

S80I

None

G103S

None

1 (128); 1 (64)

S83L, D87N

S80I

I355T,L416F

None

None

1 (128)

None

S80I

None

G103S

V29G

1 (64)

S83L, D87Y

S80I

None

G103S

None

1 (64)

S83L, D87H

None

None

G103S

None

1 (64)

S83L, D87N

None

None

D67N,G103S

None

1 (32)

S83L, D87Y

S80I

None

None

None

2 (32)

S83L

None

None

G103S

None

1 (32)

S83L

None

None

None

None

1 (32)

S83L, D87G

None

None

None

None

1 (16)

None

S80I, E84K

None

None

None

1 (16)

None

E84K

None

None

None

1 (1)

None

S80I

None

None

None

1 (32)1 (4); 1 (1)

None

None

None

G103S

None

mutation rate

52.70%

28.38%

2.70%

35.14%

1.35%

  1. Note: DANO Danofloxacin, NO number