ESBL producing Klebsiella pneumoniae. Disk diffusion test - Klebsiella pneumoniae, ESBL. Klebsiella pneumoniae producing ESBL. Antibiotic susceptibility testing of Klebsiella pneumoniae with the antibiotic disks (tested with the disk diffusion test).

Disk diffusion test. Strain of Klebsiella pneumoniae producing ESBL. Tested on Mueller-Hinton agar, cultivation 37°C, 24 hours.
Left (from top, counterclockwise): ampicillin, amoxicillin/clavulanate(Augmentin), cefuroxime, gentamicin, nalidixic acid, ciprofloxacin.
Right (from top, counterclockwise): cefotaxime, piperacillin/tazobactam, amikacin, Trimethoprim-Sulfamethoxazole (Co-trimoxazole),
tetracycline. More about ESBL at Wikipedia.