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Table 5 Distribution of resistance mechanisms in 37 CTXNS-En isolates

From: Clinical and microbiologic characteristics of cefotaxime-non-susceptible Enterobacteriaceae bacteremia: a case control study

 

ESBL

p-AmpC

c-AmpC

Bacterial species

CTX-M-1 groupa

CTX-M-2 groupb

CTX-M-9 groupc

TEM

SHVd

CMY-2

DHA-1

 

E. coli e (n = 16)

2

0

13

0

0

2

0

0

E. cloacae f (n = 8)

0

0

0

0

1

0

1

7

K. pneumoniae g (n = 7)

0

1

2

0

1

0

3

0

S. marcescens (n = 2)

0

0

0

0

0

0

0

0

C. freundii (n = 1)

0

0

0

0

0

0

0

1

E. asbriae (n = 1)

0

0

0

0

0

0

0

1

K. oxytoca (n = 1)

0

0

1

0

0

0

0

0

P. penneri (n = 1)

0

0

0

0

0

0

0

0

  1. a bla CTX-M-15 (n = 1), bla CTX-M-55 (n = 1)
  2. b bla CTX-M-2 (n = 1)
  3. c bla CTX-M-14 (n = 8), bla CTX-M-27 (n = 4), bla CTX-M-9 (n = 1) of E. coli, bla CTX-M-14 (n = 2) of K. pneumoniae and bla CTX-M-14 (n = 1) of K. oxytoca
  4. d bla SHV-12 (n = 1), bla SHV-27 (n = 1)
  5. eOne isolate carried bla CTX-M-9 and bla CMY-2
  6. fOne isolate carried bla SHV-12 and bla DHA-1. The other 7 isolates were positive for the c-AmpC hyperproduction test using the cefoxitin-cloxacillin disk method
  7. gOne isolate carried bla SHV-27 and bla CTX-M-14, and 1 isolate did not carry either ESBL or p-AmpC genes
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BMC Infectious Diseases

ISSN: 1471-2334

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