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Table 5 Frequency of AmpC genes among cefoxitin-resistant isolates and its combinations with ESBL genes

From: Prevalence and molecular characteristics of ESBL and AmpC β -lactamase producing Enterobacteriaceae strains isolated from UTIs in Egypt

AmpC genes

E. coli (n = 18)

K. pneumoniae (n = 12)

Citrobacter spp. (n = 5)

AmpC positive (n = 35)

Associated

ESBL genes

MOX

0(0%)

1(8.3%)

0(0%)

1(2.8%)

CTX-M-1 + 15

FOX

0(0%)

0(0%)

0(0%)

0(0%)

 

DHA

9 (50%)

3(25%)

0(0%)

12(34.3%)

CTX-M-15 (6)

CTX-M-1 (3)

TEM (2)

No ESBL genes (1)

CIT

0(0%)

1(8.3%)

0(0%)

1(2.8%)

CTX-M-1 + 15+ TEM

DHA+ CIT

0(0%)

1(8.3%)

0(0%)

1(2.8%)

CTX-M-1 + 15

MOX + CIT

0(0%)

1(8.3%)

0(0%)

1(2.8%)

CTX-M-1 + 15 + TEM

MOX + CIT+ DHA

0(0%)

2(16.6%)

0(0%)

2(5.6%)

CTX-M-1 + 15

Total

9(50%)

9(75%)

0(0%)

18(51.4%)

(17/18, 94.4%)