TABLE 1.

Antibiotic susceptibilities of E. aerogenes ATCC 15038 strain

Drug	Charge	Molecular mass (Da)	MICa (μg/ml) for ATCC 15038 as determined in:
			NB	NB + sorbitol (20%)
Imipenem	+, −	317	0.25	0.25
Cephaloridine	+, −	415	16	16
Cefepime	+, −	480	0.5	1
Cefotaxime	−	455	0.125	2
Ceftazidime	+, 2−	546	0.5	4
Ticarcillin	2−	384	4	16
Aztreonam	2−	435	0.5	4
Ceftriaxone	2−	554	1	16

^aValues are means of three independent determinations.