TABLE 2.

Results of confirmatory tests for ESBL production for 31 CTX-M-positive isolates

OrganismNo. of isolates testedNo. (%) of isolates positive for ESBL production by CLSI confirmatory tests witha:
CTX onlyCAZ onlyBoth drugsTotal
E. coli24711624
K. pneumoniae20022
P. mirabilis66006
Total3213 (42)118 (55)32
  • a CTX, cefotaxime; CAZ, ceftazidime.