Table 2 Phenotypic and genotypic characteristics of Salmonella strains isolated from retail meat products.

From: Increasing prevalence of ciprofloxacin-resistant food-borne Salmonella strains harboring multiple PMQR elements but not target gene mutations

Strain #

Isolation date

Sources

Serotypes

PFGE

Resistance Profiles*

CIP

CIP/PAβN

PMQRs

Mutations in gyrA

Mutations in parC

S3a

12/12/12

P

Derby

DER1

Gen

16

2

aac-oqxAB-qnrS2

—

—

S24

01/12/13

P

Derby

DER3

Gen

4

2

oqxAB

S83I

 

S35

01/26/13

P

Derby

DER5

Gen

4

4

aac-oqxAB-qnrS2

S83T

—

S36

01/26/13

P

Derby

DER5

Gen-Azi

8

2

aac-oqxAB-qnrS2

—

—

S37

01/26/13

P

Derby

DER5

Gen

4

2

aac-oqxAB-qnrS2

—

—

S38a

01/26/13

P

Derby

DER5

Gen-Azi

2

2

aac-oqxAB-qnrS2

N78H

—

S39

01/26/13

P

Derby

DER5

Gen

8

4

aac-oqxAB-qnrS2

—

—

S40

01/26/13

P

Derby

DER5

Gen-Azi

8

4

aac-oqxAB-qnrS2

—

—

S41

01/26/13

P

Derby

DER5

Gen-Azi

4

4

aac-oqxAB-qnrS2

—

—

S42

01/26/13

P

Derby

DER5

Gen

4

2

aac-oqxAB-qnrS2

—

—

S44

01/26/13

P

Derby

DER5

Gen

4

4

aac-oqxAB-qnrS2

—

—

S4a

12/12/12

P

Derby

DER6

Gen

2

2

aac-oqxAB-qnrS2-qnrB8

—

—

S9

12/12/12

P

Derby

DER6

 

4

0.5

aac-oqxAB-qnrS2

S83T

—

S54

03/13/13

C

Derby

DER8

 

2

0.12

oqxAB-qnrS8-qnrB

S83T

 

S49

03/03/13

P

Derby

DER10

Gen-Azi

>32

>8

oqxAB-qnrS1-qnrB

S83T

 

S48

03/03/13

C

Derby

DER11

Gen

2

0.5

qnrS1

S83T

—

S7a

12/12/12

P

Typhimurium

TR1

Gen

4

0.25

aac-oqxAB

D87N

—

S8

12/12/12

P

Typhimurium

TR1

 

4

0.25

oqxAB

D87N

—

S11

12/12/12

P

Typhimurium

TR1

Gen

2

0.25

aac-oqxAB

D87N

—

S79

05/17/13

P

Typhimurium

TR2

Gen

4

0.12

oqxAB

S83F

—

S65

03/21/13

P

Typhimurium RH2

TRH1

Gen

2

0.5

aac-oqxAB-qnrS1

D87N

—

S66

03/21/13

P

Typhimurium RH2

TRH2

Gen

4

0.5

aac-oqxAB-qnrS1

—

—

S71a

05/01/13

P

Typhimurium RH2

TRH2

Gen

>32

>8

aac-oqxAB-qnrS1

D87N

—

S6

12/12/12

P

Typhimurium RH2

TRH2

Gen

4

0.25

aac-oqxAB-qnrS1

—

—

S20

01/12/13

C

Typhimurium RH2

TRH3

Gen

2

0.5

aac-qnrB

D87N

—

S13

12/25/12

P

Indiana

I1

Gen-Azi-Cro

>32

>8

aac-oqxAB

S83F, D87N

—

S14

12/25/12

C

Indiana

I1

Gen-Azi-Cro

>32

>8

aac-oqxAB-qnrB

S83F, D87N

S80 R

S16

12/25/12

P

Indiana

I1

Gen-Azi-Cro

>32

>8

aac-oqxAB

S83F, D87N

C72G, S80 R

S27

01/19/13

P

Rissen

R1

 

8

0.12

oqxAB

H80N, S83T

Q91H

S59

03/16/13

C

London

L1

 

2

0.12

 

D87N

 

S2

12/12/12

P

Sanferberg

S1

Gen

4

4

aac-oqxAB-qnrS2

S83T

—

S45

02/22/13

P

Virchow

V2

Gen

4

4

aac-oqxAB-qnrS8-qnrD

—

—

  1. *All isolates were resistant to the antibiotic profile of Amp-Cip-Nal-Kan-Str-Chl-Tet-Sul-Ola (olaquindox); specific strains were also resistant to Gen, gentamicin; Azi, azithromycin; and Cro, ceftriaxone. PaβN, Phenylalanine-arginine β-naphthylamide. C, Chicken; P, Pork; aac, aac(6′)-Ib-cr;
  2. aselected for S1-PFGE and Southern hybridization.
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