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Table 2 Characteristics of S. sonnei isolates from Bhutan, Nepal and Thailand

From: Molecular characterization and PCR-based replicon typing of multidrug resistant Shigella sonnei isolates from an outbreak in Thimphu, Bhutan

Study site

Number of isolates

Resistance pattern

MIC (μg/ml)

Integrons

DNA Gyrase A mutation

Replicon plasmid

AZM

NA

CIP

Ser83

Asp87

Bhutan

19

S, SXT, TE, NA, CIP

3.0-4.0

>256

3.0-4.0

Class 2

Ser83Leu

Asp87Gly

ColE

Bhutan

9

S, SXT, TE, NA, CIP

3.0-4.0

>256

3.0-4.0

Class 2

Ser83Leu

Asp87Gly

B/O, ColE

Bhutan

1

S, SXT, TE, NA, CIP

4.0

>256

3.0

Class 2

Ser83Leu

Asp87Gly

I1, ColE

Nepal

1

S, SXT, TE, NA, CIP

4.0

>256

4.0

Class 2

Ser83Leu

Asp87Gly

ColE

Nepal

2

S, SXT, TE, NA

3.0-4.0

>256

0.190-0.125

Class 2

Ser83Leu

Neg

ColE

Nepal

1

S

3.0

3.0

0.008

Neg

Neg

Neg

ColE

Thailand

1

S, SXT, TE, NA, AM

3.0

>256

0.190

Neg

Ser83Leu

Neg

B/O, ColE

Thailand

1

S, SXT, TE, AM

3.0

3.0

0.004

Neg

Neg

Neg

I1, ColE

Thailand

2

S, SXT, TE, NA, AM

3.0-4.0

128

0.004

Class 2

Neg

Asp87Tyr

I1, ColE

Thailand

1

S, SXT, TE, NA,

4.0

>256

0.004

Class 2

Ser83Leu

Neg

ColE

  1. AZM, azithromycin; NA, nalidixic acid; CIP, ciprofloxacin; AM, ampicillin; SXT, trimethoprim-sulfamethoxazole; CRO, ceftriaxone; S, streptomycin; TE, tetracycline; Ser, Serine; Leu, Leucine; Asp, Aspartic acid; Gly, Glycine; Tyr, Tyrosine; Neg, negative result.