Table 3.

Extended-spectrum beta-lactams tested by participating‚ÄČlaboratories

Antimicrobial agent(s) testedNo. of laboratories
Ceftazidime, ceftriaxone9
Ceftazidime only4
Ceftazidime, ceftriaxone, cefotaxime3
Ceftazidime, cefotaxime3
Ceftazidime, aztreonam2
Ceftizoxime only2
Cefotaxime only2
Ceftazidime, ceftriaxone, cefotaxime, aztreonam, ceftizoxime1
Ceftazidime, ceftriaxone, cefotaxime, aztreonam1
Ceftazidime, ceftriaxone, aztreonam1
Ceftizoxime, ceftriaxone, cefotaxime1
Ceftazidime, ceftizoxime1
Ceftriaxone only1
Aztreonam only1
No extended-spectrum cephalosporins or aztreonam6
‚ÄÉTotal38