. 2010 Jun 25;76(16):5577–5584. doi: 10.1128/AEM.00648-10

TABLE 1.

L. monocytogenes strains used in this study

Strain ID	Yr isolated	Origin (reference)	Serotype	Sau3AI digestion	MboI digestion	RM probe reactivity
F2365	1985	California outbreak (25)	4b	−	+	+
DS86		This study; RM deletion mutant of strain F2365	4b	+	+	−
A7	1999	Guacamole	1/2a	−	+	+
DS14		This study; RM deletion mutant of strain A7	1/2a	+	+	−
A8	1999	Avocado pulp, Mexico	1/2a	−	+	+
A11	2001	Avocado pulp, Mexico	1/2a	−	+	+
A29	2002	Avocado pulp, Mexico	1/2a	−	+	+
A33	2003	Avocado pulp, Mexico	1/2a	−	+	+
A36	2003	Guacamole	1/2a	−	+	+
SE076	1986	Crab meat, frozen	1/2a	−	+	+
A95	2004	Avocado pulp	1/2a	−	+	+
FSL N3-165	2002	Soil, farm, New York (26a)	1/2a	−	+	NT^b
FSL J1-208	1998	Goat, encephalitis (38a)	4a	−	+	NT^b
A35^a	2003	Guacamole	1/2a	−	+	−
1a (255)^a	Unknown	Lab QC^c strain, North Carolina Dept. of Health	1/2a	−	+	−
10^a	2005	Environment, turkey processing plant (23)	1/2a	−	+	−
2003-184R^a	2003	Human case, North Carolina	1/2a	−	+	−
A22	2001	Sliced turkey	1/2a	+	+	−
A34	2003	Cuttlefish	1/2a	+	+	−
A38	2003	Frozen snow crab clusters	1/2a	+	+	−
A39	2003	Cooked baby clam meat	1/2a	+	+	−
A42	2001	Mozzarella curd	1/2a	+	+	−
A67	2001	Frozen capelin roe	1/2a	+	+	−
A74	2003	Avocado puree for ice cream	1/2a	+	+	−
A75	2003	Smoked salmon	1/2a	+	+	−
A94	2004	Cheese chile relleno	1/2a	+	+	−
A96	2004	Breaded catfish	1/2a	+	+	−
A97	2004	Avocado puree	1/2a	+	+	−
AT-05	1987	Raw milk	1/2a	+	+	−
AT-01	1986	Brie cheese	1/2a	+	+	−

These isolates were resistant to Sau3AI, but their RM cassettes were not homologous to those of strain F2365; the isolates are designated “x-RM” in Fig. 4.

NT, not tested. Genome sequence analysis revealed the presence of the RM genes, as described in Results.

QC, quality control.