Skip to main content

Table 1 Properties of the bacterial strains used and average recoveries of CFU on each selective agar medium

From: Development of selective medium for IMP-type carbapenemase-producing Enterobacteriaceae in stool specimens

Strain Species Type of β-lactamase MIC (mg/L) % CFU compared to that of each strain grown in MHA
   Carbapenemase ESBL MEPM IPM CHROMagar KPC chromID CARBA MC-ECC M-ECC
1504-16 Escherichia coli IMP-6 CTX-M-15, CTX-M-2 8 0.5 0* 0* 91 97
1502-08 E. coli IMP-6 - 8 0.5 0* 0* 0* 42*
1405-06 E. coli IMP-6 CTX-M-15, CTX-M-2 3 0.38 0* 0* 74 91
1502-25 E. coli IMP-6 CTX-M-2 3 3 44* 112 80 98
1409-10 Klebsiella pneumoniae IMP-6 CTX-M-2 1 0.19 0* 0* 4* 95
1502-02 K. pneumoniae IMP-6 - 4 0.25 0* 0* 3* 123
1409-09 K. pneumoniae IMP-6 CTX-M-2 0.5 0.25 0* 0* 0* 27*
1212-13 K. pneumoniae IMP-6 CTX-M-2 0.5 0.25 0* 0* 8* 66
1412-36 K. pneumoniae IMP-1 CTX-M-2 3 0.5 0* 0* 33* 97
1502-06 K. pneumoniae IMP-1 - 1 1 0* 114 75 74
1011-12 K. pneumoniae KPC-2 - >32 >32 97 93 93 100
BAA-1705 K. pneumoniae KPC-2 - 32 32 109 115 157 155
BAA-2470 K. pneumoniae NDM-1 CTX-M-15 16 32 41 112 119 116
BAA-2471 E. coli NDM-1 CTX-M-15 >32 >32 138 114 170 149
TRKP-54 K. pneumoniae OXA-48 - 16 32 99 89 105 95
1502-04 Enterobacter cloacae - - 2 2 10* 0* 0* 21*
1012-01 Serratia marcescens - - 6 >32 3* 113 127 98
1104-18 E. cloacae - - 0.19 0.5 0* 0* 0* 0*
1004-112 E. coli - CTX-M-2 0.016 0.25 0* 0* 0* 0*
1004-25 K. pneumoniae - CTX-M-2 0.032 0.38 0* 0* 0* 0*
  1. ESBL extended-spectrum β-lactamase, MEPM meropenem, IPM imipenem, MHA Mueller-Hinton agar
  2. *p < 0.01