Table 3 Characterization of E. coli isolates grouped on Profil I in terms of phenotypic resistance and its genotypic basis, phylogenetic groups, and clonal relatedness.

From: Molecular mechanisms impact on fluoroquinolone resistance among E.coli from enteric carriage monitoring before prostate biopsy and earliest description of qnrB81

Strains

Qs -FQs resistance phenotypes

NAL NXN OFX CIP

Qs-FQs MICs (mg/L)

ATB resistance profiles

QRDRs mutations

PMQRs gene

Phylogenetic group

ST131 clone

PFGE

pulsotype/subtype

NAL

S ≤ 16

R > 16

OFX

S ≤ 0.25 R > 0.5

C.I.P.

S ≤ 0.25

R > 0.5

ß-lactams

Aminoglycosides

Other

gyrA

parC

E. coli (1)

RSSS

24

0.24

0.24

AMP, TIC, PIP

-

-

WP

WP

qnrS1

B2

+

Pulsotype I

E. coli (2)

RSSS

24

0.24

0.24

AMP, TIC, PIP

-

-

WP

WP

qnrS1

B2

+

Pulsotype I

E.coli (3)

RSSS

24

0.24

0.24

AMP, TIC, PIP

-

CHL, SXT

WP

WP

qnrB19

Unknown

-

-

E. coli (4)

RSSS

24

0.24

0.24

AMP, TIC, PIP, AMC, TCC, MEC

-

-

WP

WP

qnrB81

Clade I or II

-

-

E.coli (5)

RSSS

24

0.24

0.24

AMP, TIC, PIP

-

SXT

WP

WP

qnrB

B2

+

Pulsotype VII

E.coli (6)

RSSS

24

0.24

0.24

AMP, TIC, PIP

-

SXT

WP

WP

qnrS15

B2

+

Subtype VIIIb

  1. MICs: minimum inhibitory concentration levels; S: sensitive ; R: resistant; NAL: Nalidixic acid, NXN: Norfloxacin, OFX: ofloxacin; CIP: ciprofloxacin; AMP: ampicillin; TIC: ticarcillin; PIP: piperacillin; TCC : Ticarcillin + Ac.clavulanic; MEC: mecillinam; CHL: chloramphenicol; SXT: co- trimoxazole; RPF: plasmid resistance to fluoroquinolones, QRDRs: quinolone resistance determining region, R: resistant; S: sensitive; WP: wild phenotype, +: positive; -: Negative.