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Table 3 Geographical distribution of ESBL- and AmpC-producing E. coli isolates in seven regions of China

From: Nationwide high prevalence of CTX-M and an increase of CTX-M-55 in Escherichia coli isolated from patients with community-onset infections in Chinese county hospitals

ESBL genotype

No. of isolates (prevalence, %)

North China ( n  = 93)

Northwest China ( n  = 81)

Northeast China ( n  = 37)

East China ( n  = 43)

South China (n = 109)

Central China (n = 109)

Southwest China (n = 78)

Total ( n  = 550)

CTX-M-1 group

16

14

7

10

14

10

2

73

  CTX-M-15

7

6

1

2

3

4

 

23

  CTX-M-55

6

6

5

7

10

5

2

41

  CTX-M-3

3

1

 

1

 

1

 

6

  CTX-M-101

 

1

     

1

  CTX-M-12

  

1

    

1

  CTX-M-1

1

      

1

CTX-M-9 group

32

22

5

3

23

40

36

161

  CTX-M-14

29

19

4

3

22

35

35

147

  CTX-M-9

 

1

     

1

  CTX-M-24

 

2

1

 

1

2

1

7

  CTX-M-27

1

      

1

  CTX-M-65

2

    

2

 

4

  CTX-M-104

     

1

 

1

CMY-2

1

3

2

1

   

7

DHA-1

2

      

2

CTX-M-1+9 groups

1

7

2

 

2

3

 

15

  CTX-M-14+CTX-M-1

1

      

1

  CTX-M-14+CTX-M-3

 

1

   

1

 

2

  CTX-M-14+ CTX-M-55

 

3

  

2

1

 

6

  CTX-M-14+ CTX-M-15

 

3

1

  

1

 

5

  CTX-M-24+ CTX-M-3

  

1

    

1

CTX-M-14+OXA-10

1

      

1

CTX-M-3+ DHA

  

1

    

1

CTX-M-14+DHA

2

      

2

CTX-M-15+CMY-2

1

     

1

2

CTX-M-24+CMY-2

0

 

1

    

1

Totala

53 (57.0)

43 (53.1)

16 (43.2)

13 (30.2)

38 (34.9)

54 (49.5)

39 (50.0)

256 (46.5)

  1. aThe number exclude the strains that only encoded ampC gene.