TABLE 1.

Frequency of resistance to non-β-lactam antibiotics of ESBL-producing Enterobacteriaceae isolates

SpeciesNo. of isolatesESBL% of isolates with resistance toa:No. of RAPD types
AMKTOBGENTETCHLNALNORCIPTMP
E. cloacae 6CTX-M-1501001001001001001001001006
9SHV-1278891289891008989891
E. coli 11CTX-M-14010010082821001001001009
95CTX-M-1517978388739898989583
1CTX-M-15 + SHV-27010010001000100100100NDb
1CTX-M-15 + SHV-120100100100100100100100100ND
1SHV-1210010001001001001000100ND
K. pneumoniae 3CTX-M-140676767676733331003
54CTX-M-15209689844093969510034
6SHV-1250833350838367671005
M. morganii 2CTX-M-14100100100100100100100100100ND
P. mirabilis 1CTX-M-14000100100100100100100ND
  • a AMK, amikacin; TOB, tobramycin; GEN, gentamicin; TET, tetracycline; CHL, chloramphenicol; NAL, nalidixic acid; NOR, norfloxacin; CIP, ciprofloxacin; TMP, trimethoprim.

  • b ND, not determined.