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Table 5 Integrons gene cassette arrays and phenotypically resistant isolates

From: Antimicrobial resistance and integron gene cassette arrays in commensal Escherichia coli from human and animal sources in IRI

Integrons and cassette/arrays

No. of the isolates carrying gene cassette array

No. of isolates phenotypically resistant to antibiotics

SXT (25 μg)

CAZ (30 μg)

S (10 μg)

GM (10 μg)

AN (30 μg)

K (30 μg)

AMP (10 μg)

PRL (100 μg)

NA (30 μg)

C (30 μg)

Class I integrons

49

25

5

33

7

0

3

23

4

9

5

 dfrA1

6

4

1

2

0

0

0

4

0

1

1

 dfrA5

4

2

0

1

0

0

0

3

0

1

0

 dfrA7

3

2

1

2

0

0

0

2

0

0

0

 dfrA12

7

3

0

4

0

0

0

4

1

2

0

 aadA1

18

7

2

15

3

0

0

3

2

3

1

 aadA4

3

2

0

2

2

0

0

3

0

1

0

 dfrA17-aadA1

2

2

0

2

1

0

2

1

0

0

2

 aadA1-aadB

3

1

1

2

1

0

1

2

1

0

1

 dfrA12–orfF–aadA2

3

2

0

3

0

0

0

1

0

1

0

Class II integrons

16

9

7

10

5

0

3

6

3

4

2

 dfrA1

4

3

1

1

0

0

0

2

1

1

0

 dfrA1-sat2-aadA1

4

2

2

3

2

0

1

1

0

0

1

 dfrA1-sat1-aadA1

4

1

1

2

1

0

2

3

2

2

1

 at-sat1-aadA1

4

3

3

4

2

0

0

0

0

1

0

Total

65

34

12

43

12

0

6

29

7

13

7

  1. SXT trimethoprim/sulfamethoxazole, CAZ ceftazidime, S streptomycin, GM gentamycin, AN amikacin, K kanamycin, AMP ampicillin, PRL piperacillin, NA nalidixic acid, C chloramphenicol