Table 1. Strains employed in this study.

Strain	Description1	Reference
A. baumannii ATCC 17978 UN	WT A. baumannii from fatal pediatric meningitis, UN isolate. Reference genome CP079931.	[172,174]
A. baumannii ATCC 17978 VU	WT A. baumannii from fatal pediatric meningitis, VU isolate. Reference genomes NZ_CP018664; CP012004	[172,174–176]
ΔbasG	Acinetobactin and pre-acinetobactin biosynthetic mutant; markerless	[19]
ΔbfnL	Baumannoferrin A and B biosynthetic mutant; markerless	[19]
ΔfbsE	Fimsbactins A through F biosynthetic mutant; markerless	[19]
ΔbasG bfnL	Acinetobactin and baumannoferrins biosynthetic mutant. Encodes for the fimsbactins; KanR	[19]
ΔbasG fbsE	Acinetobactin and fimsbactins biosynthetic mutant. Encodes for the baumannoferrins; KanR	[19]
ΔbfnL fbsE	Baumannoferrins and fimsbactins biosynthetic mutant. Encodes for acinetobactin and pre-acinetobactin; KanR	[19]
ΔbasG bfnL fbsE	Acinetobactin and pre-acinetobactin, baumannoferrins, and fimsbactins biosynthetic mutant. Siderophore-deficient; KanR	[19]
WT A. baumannii VU/ p.PfbsB.luxABCDE.MU368.tet	WT A. baumannii containing the p.luxABCDE.MU368.tet plasmid with the iron-regulated fbsB promoter cloned upstream of luxABCDE; TetR	This study
WT A. baumannii VU/ p.luxABCDE.MU368.tet	WT A. baumannii containing the promoterless p.luxABCDE.MU368.tet plasmid construct; TetR	[25]

¹Strains marked Kan^R have the last gene in their strain designation replaced with a kanamycin resistance determinant.