Table 3 Co-carriage of ESBLs genes and aac(6′)- Ib-cr gene in Enterobacteriaceae isolates

aac(6′)- Ib-cr associated with CTX-M group genes

E. coli

CTX-M-15

22

E. coli

CTX-M-15 + 1

25

K. pneumoniae

CTX-M-15 + 1

24

Citrobacter spp

CTX-M-15 + 1

22

Proteus spp.

CTX-M-15 + 1

2

E. coli

CTX-M-1

19

K. pneumoniae

CTX-M-1

6

Citrobacter spp.

CTX-M-1

3

E. coli

CTX-M-8

2

Total

125 (75.5%)

aac(6′)-Ib-cr not associated with CTX-M group genes

Total

E. coli

SHV + TEM

21

E. coli

SHV

15

E. coli

TEM

2

Proteus spp.

SHV

2

40 (24.2%)

P value

< 0.01