Table 1.

Broth microdilution results of clinical strains and discrete colonies within the inhibition zones.

Isolate	Microorganism	MIC value (μg/mL)	MIC value of colony within inhibition zones (μg/mL)	p
S	E. coli ATCC 25922	0.016	N/A
R	E. coli	16	N/A
KP8	K. pneumoniae	1	8	0.00012
EC11	E. coli	1	8
KP35	K. pneumoniae	1	8
KP68	K. pneumoniae	1	8
KP86	K. pneumoniae	1	16
KP135	K. pneumoniae	0.25	4
EC140	E. coli	0.25	16
KP168	K. pneumoniae	0.25	16
EC176	E. coli	0.25	4
EC193	E. coli	0.25	16

N/A: not applicable.