Table 3. Minimum inhibitory concentrations at 48 h for DFO, DFP and DIBI in RPMI.

Microorganism	MIC
	DIBI			DFP			DFO
	μg mL–1	μM b	μMFe c	μg mL–1	μM	μMFe c	μg mL–1	μM	μMFe c
S. aureus ATCC 43300 a	4	4.06	1.35	40	288	96	>1280	>1949	>1949
A. baumannii ATCC 19606	2	2.03	0.67	80	575	192	>1280	>1949	>1949
C. albicans ATCC SC5314	2	2.03	0.67	160	1150	383	>1280	>1949	>1949

^aMethicillin-resistant Staphylococcus aureus (MRSA).

^bConcentration of 5 based on 24 mol% content in DIBI.

^cMIC value normalized for maximum amount of iron bound by each chelator, assuming octahedral coordination with the following (ligand : Fe) ratios: DFO (1 : 1), DFP (3 : 1), DIBI (3 : 1). The ratio for DIBI is expressed according to the tris-chelate complexes of 5.