Table 1. Sources of 496 genomes within HierCC cluster HC20_373, including ATCC14028s derivatives (EnteroBase 1/12/2020).

	Laboratory-derived	Human infection		Livestock			Environment		Other
Summary data		Laboratory	Non-Laboratory	Poultry	Swine	Cows	Plants or Food	Soil or Rivers	Animal Feed, Llama, Lamb
Number	156	17	159	42	33	24	47	11	7
Dates	Since 1960	2010–2020	2004–2020	2001–2018	2007–2019	2000–2018	2002–2019	2007–2018	2007–2017
Geography	global	N. America France, UK	global	Americas Europe	Americas, Europe Africa	Americas Europe	Americas, Europe, Asia	North America, Europe	Americas, Europe, Asia
Number with transposon	27 (17%)	3 (18%)	0 (<1%)	0 (<2%)	0 (<3%)	0 (<4%)	0 (<2%)	0 (<9%)	0 (<14%)
Transposon	cat, Tn5, Tn10	cat, tet + Tn3, Luciferase	None	None	None	None	None	None	None
No. which acquired GI	3 (2%)	1 (6%)	17 (11%)	5 (12%)	0 (<3%)	2 (8%)	3 (6%)	0 (<9%)	1 (14%)
GI	IncP1 plasmid, λ prophage	1 IncI Plasmid	14 IncI & other plasmids; 6 prophages	1 plasmid; 4 prophages	None	Prophage	2 plasmids; 1 prophage	None	1 IncI1-I plasmid
Number which lost GI	9 (6%)	2 (12%)	1 (<1%)	0 (<2%)	0 (<3%)	1 (4%)	0 (<2%)	0 (<9%)	1 (14%)
GI lost	SPI-1, SPI-11, pSV IncFII Virulence plasmid	SPI-2	SPI-12	None	None	Virulence plasmid	None	None	SPI-1,2,3,4,5, pSV IncFII Virulence plasmid
Number which lost antigen genes/Gifsy	5 (3%)	2 (12%)	0 (<1%)	2 (5%)	0 (<3%)	0 (<4%)	0 (<2%)	0 (<9%)	1 (14%)
Antigen genes/Gifsy	fli, Gifsy-1 glycosyltransferase	rfb	None	Gifsy-1	None	None	None	None	Gifsy-1, Gifsy-3

NOTE: GI, any form of genomic island, including plasmids and bacteriophages.