Table 1 Distribution of beta-lactamase genes and phylogroups among third generation cephalosporin resistant Escherichia coli (n = 202)

ESBL-producing

(n = 195)

bla_TEM

2

(10.5)

3

(15.8)

7

(36.8)

1

(5.3)

2 (10.5)

1

(5.3)

1

(5.3)

2

(10.5)

19

bla_TEM+bla_CIT

5 (83.3)

1

(16.7)

6

bla_TEM+bla_DHA

1

(100)

1

bla_TEM+ bla_{CTX−M (unknown group)}

3

(20)

3

(20)

2 (13.3)

3

(20)

3

(20)

1

(6.7)

15

bla_TEM+ bla_{CTX−M (unknown group)} + bla_CIT

1

(100)

1

bla_TEM+bla_CTX−M−1

10 (19.2)

2

(3.9)

22

(42.3)

3

(5.8)

7 (13.5)

3

(5.8)

1

(1.9)

1

(1.9)

3

(5.8)

52

bla_TEM+bla_CTX−M−9

22

(75.9)

4 (13.8)

3 (10.3)

29

bla_TEM+bla_CTX−M−9+bla_DHA

1

(10)

6

(60)

1

(10)

2

(20)

10

bla_TEM+bla_CTX−M−1+bla_CTX−M−9

5

(26.3)

1

(5.3)

11 (57.9)

2

(10.5)

19

bla_TEM+bla_CTX−M−1+bla_CTX−M−9+bla_DHA

1

(100)

1

bla_{CTX−M (unknown group)}

1

(100)

1

bla_CTX−M−1

10

(52.6)

2 (10.5)

3 (15.8)

2 (10.5)

1

(5.3)

1

(5.3)

19

bla_CTX−M−9

5 (83.3)

1

(16.7)

6

bla_CTX−M−1+bla_CTX−M−9

5

(100)

5

bla_TEM+ bla_{CTX−M (unknown group)} + bla_SHV

1

(100)

1

bla_TEM+bla_CTX−M−1+bla_SHV

3

(100)

3

bla_TEM+bla_CTX−M−9+bla_SHV

1(100)

1

Not detected

1

(16.7)

4

(66.7)

1 (16.7)

6

ESBL-non-producing

(n = 7)

bla_TEM+bla_CIT

1

(11.1)

1 (11.1)

2 (22.2)

4

bla_TEM+bla_DHA

1

(100)

1

bla_CIT

1

(50)

1

(50)

2

Total

17

13

85

20

21

8

22

3

13

202