TABLE 1.

Results of routine imipenem susceptibility testing and detection of MBL-producing gram-negative bacilli in 2003 and 2004 in Korea

SpeciesYrNo. (%) of isolatesNo. (%) of nonduplicate imipenem-nonsusceptible isolates
TotalImipenem-resistantTestedPositive with:
Hodge testDouble-disk synergy testblaVIM-2-like geneablaIMP-1-like geneablaSIM-1-like genea
P. aeruginosa 20032,913816 (28)24327 (11)16 (7)16 (100)00
20043,0571,009 (33)33838 (11)20 (6)18 (90)2 (10)0
Other Pseudomonas spp.200314479 (55)1414 (100)14 (100)14 (100)b00
200411470 (61)3028 (93)28 (93)28 (100)b00
Acinetobacter spp.20031,765282 (16)19465 (34)51 (26)27 (53)21 (41)3 (6)
20041,529459 (30)319222 (70)85 (27)54 (64)25 (29)6 (7)
K. pneumoniae 20031,81936 (2)222 (9)2 (9)2 (100)00
20042,00639 (2)222 (9)0
E. cloacae 20038212 (<1)11 (100)1 (100)1 (100)00
20047731 (<1)11 (100)0
S. marcescens 20035361 (<1)11 (100)1 (100)1 (100)00
20044834 (<1)41 (25)0
Total15,9602,797 (18)1189402 (34)217 (18)161 (74)48 (22)9 (4)
  • a Numbers in parentheses indicate the proportions of isolates among all MBL-producing isolates.

  • b All blaVIM-2-like-gene-positive isolates were P. putida.