Table 1. S. marcescens strains and recombinant plasmids used in this study.

Name	Description	Reference
S. marcescens
ATCC 13880	pond water isolate	American Type Culture Collection
gn773	human bloodstream infection isolate, also referred to as 2880STDY5682865	[11]
UMH7	human bloodstream infection isolate	[16]
UMH9	human bloodstream infection isolate	[16]
UMH11	human bloodstream infection isolate	[16]
UMH9 Δwzi::nptII	1392-bp deletion of the wzi ORF and insertion of nptII from pKD4	this study
UMH9 ΔCPSv::nptII	16,214-bp deletion of the capsule variable region and insertion of nptII from pKD4	this study
UMH9 ΔneuB::nptII	ΔneuB deletion allele retaining only the neuB start and stop codons with nptII from pKD4 inserted	this study
UMH9 ΔneuAB	in-frame ΔneuAB deletion retaining the first 30 bp of neuA and the last 30 bp of neuB	this study
plasmids
pTOX11nptII	pTOX11 derivative encoding kanamycin resistance	this study
pBAD2	pBAD18-Km harboring the UMH9 neuA and neuB ORFs	this study
pBB16	pBBR1MCS-5 harboring the UMH9 wzi ORF	this study
pBB23	pBBR1MCS-5 harboring the UMH9 neuB ORF	this study