TABLE 1.

Description of the 10 Listeria monocytogenes parental strains and the corresponding strains adapted to the two biocides, benzalkonium chloride (BC), and didecyldimethylammonium chloride (DDAC), or exposed to water (referred to as Control).

Strain	Listadapt ida	Source category	Lineage	CC	CIP MICc (mg/L)	Biocide adaptation
						DDAC	BC
Parental	FR-DA-B-CH-295	F	II	CC21	1
Control	FR-BIO-T-500				1
Adapted	FR-BIO-DC-501				8	X
Parental	FR-ME-U-UN-465	F	I	CC2	2
Control	FR-BIO-T-502				2
Adapted	FR-BIO-BC-503				8		X
Adapted	FR-BIO-DC-504				16	X
Parental	FR-ME-P-UN-410	F	II	CC37	2
Control	FR-BIO-T-507				1
Adapted	FR-BIO-DC-508				8	X
Parental	FR-VE-U-UN-470	F	II	CC37	2
Control	FR-BIO-T-505				2
Adapted	FR-BIO-DC-506				8	X
Parental	CZ-NAT-SO-22	NE	I	CC1	2
Control	CZ-BIO-T-276				2
Adapted	CZ-BIO-BC-277				8		X
Adapted	CZ-BIO-CD-278				8	X
Parental	NO-DEE-FE-3	A	II	CC11	1
Control	NO-BIO-T-40				2
Adapted	NO-BIO-BC-41				4		X
Parental	CZ-OTH-UN-8	A	II	CC7	2
Control	CZ-BIO-T-282				2
Adapted	CZ-BIO-BC-283				8		X
Adapted	CZ-BIO-CD-284				16	X
Parental	CZ-NAT-SO-15	NE	II	CC20	2
Control	CZ-BIO-T-286				2
Adapted	CZ-BIO-BC-287				8		X
Adapted	CZ-BIO-CD-288				8	X
Parental	IT-FOX-FE-63	A	I	CC1	4
Control	IT-BIO-T-137				2
Adapted	IT-BIO-BC-138				8		X
Adapted	IT-BIO-CD-139				8	X
Parental	NL-GOA-UN-2	A	II	CC26	2
Control	NL-BIO-T-65				2
Adapted	NL-BIO-BC-66				8		X
Adapted	NL-BIO-CD-67				8	X

^aThe strains were isolated as part of the European project “LISTADAPT” (Adaptive traits of Listeria monocytogenes to its diverse ecological niches; https://onehealthejp.eu/jrp-listadapt/).

CZ, Czech Republic; NO, Norway; NL, the Netherlands; FR, France; IT, Italy.

^bF, Food; A, Animal; NE, Natural environment.

^cCiprofloxacin minimum inhibitory concentration (CIP MIC).