Table 3.

Antimicrobial susceptibility profiles of the Escherichia coli isolates recovered after induction with cefalotin.

	Resistant E. coli isolates
Antimicrobial	Derived from E4	Derived from E11	Derived from E21
Cefoxitin	CF-3/-4/-5/-6/-7/-8/-9	CF-5/-6/-7/-8/-9	CF-5/-6/-7/-8/-9
Ceftazidime	CF-5/-6/-7/-8/-9	CF-5/-6/-7/-8/-9	CF-7/-8/-9
Ampicillin	CF-4/-5/-6/-7/-8/-9	CF-3/-4/-5/-6/-7/-8/-9	CF-6/-7/-8/-9
Amoxicillin/clavulanic acid	CF-4/-5/-6/-7/-8/-9	CF-4/-5/-6/-7/-8/-9	CF-6/-7/-8/-9
Kanamycin ∗	CF-4/-5/-6/-7/-8/-9	CF-7/-8/-9	CF-6/-7/-8/-9

 ^∗All E. coli isolates had intermediate resistance to cefoxitin, ceftazidime, and kanamycin.