isolates with partial or total chromosomal beta-lactamase derepression were highly resistant to cefotaxime and ceftriaxone ( mic greater than 128 mg/l ) but only those with total derepression were resistant ( mic 16-32 mg/l ) to cefpirome and ceftazidime , while those with partial derepression were sensitive to 4-8 mg/l of the latter antibiotics .
C0007554
cefotaxime
C0007561
ceftriaxone