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Table 2 Frequency and distribution of CTX-M groups among CTX-M positive Gram-negative bacilli isolates

From: Prevalence and antibiotic susceptibility pattern of CTX-M type extended-spectrum β-lactamases among clinical isolates of gram-negative bacilli in Jimma, Ethiopia

CTX-M positive species

CTX-M groups (total)

CTX-M group combinations

CTX-M-1

CTX-M-2

CTX-M-8 + 25

CTX-M-9

CTX-M-1 alone

CTX-M-1 + 2

CTX-M-1 + 9

CTX-M-1 + 2 + 8 + 25

CTX-M-9 alone

n:

%

n:

%

n:

%

n:

%

n:

%

n:

%

n:

%

n:

%

n:

%

E. coli (n = 13)

12

92.3

0

0

0

0

2

15.4

11

84.6

0

0

1

7.7

0

0

1

7.7

K. pneumoniae (n = 30)

30

100

1

3.3

0

0

0

0

29

96.7

1

3.3

0

0

0

0

0

0

E. cloacae (n = 9)

9

100

0

0

0

0

0

0

9

100

0

0

0

0

0

0

0

0

Other Enterobacteriaceaea (n = 12)

11

91.7

0

0

0

0

1

8.3

11

91.7

0

0

0

0

0

0

1

8.3

P. aeruginosa (n = 3)

3

100

1

33.3

1

33.3

0

0

2

66.7

0

0

0

0

1

33.3

0

0

Other Non-Fermentersb (n = 1)

1

100

0

0

0

0

0

0

1

100

0

0

0

0

0

0

0

0

Total (n = 68)

66

97.1

2

2.9

1

1.5

3

4.4

63

92.6

1

1.5

1

1.5

1

1.5

2

2.9

  1. aincludes 3 M. morganii, 4 P. mirablis, 2 P. stuartii,K. oxytoca and 1 E. hermanii
  2. bincludes 1 A. faecalis