Table 3.

Distribution of MICs and antibiotic resistance genes among lactobacilli and pediococci isolated from feedlot environment.

LAB	Strain (CRL)	Origin		CLI	CHL	ERY	GEN	KAN	STR	TET	Resistance gene(s)
L. acidophilus			Cut-off value	1	4	1	16	64	16	4
	2061	CF	MIC	0.063	4	0.5	2	32	2	64
	2074	CF		2	4	0.25	0.5	8	64	32
	2152	CF		0.125	4	0.5	2	8	2	128	ermB
L. amylovorus			Cut-off value	1		1	16	16	16	4
	2044	CF	MIC	16	1	0.25	2	8	1	16
	2065	CF		0.4	2	8	2	8	128	16
	2115	PS		0.4	4	1	2	4	1	128
	2116	PS		0.4	4	0.25	2	16	1	64
L. casei			Cut-off value	1	4	1	16	64	64	4
	2088	PS	MIC	0.125	4	4	16	32	64	0.5	aph(3′′)-III, aadA
L. fermentum			Cut-off value	1	4	1	16	64	64	8
	2085	FR	MIC	0.032	4	0.016	0.5	16	4	4	ermB, ant(6), aadA
L. mucosae			Cut-off value	1	4	1	16	64	32	8
	2063	PS	MIC	0.125	64	16	16	64	32	64
	2064	CF		0.032	2	1	4	32	2	64
	2069	CF		0.032	2	1	4	4	2	32
	2070	PS		0.125	4	0.5	2	16	2	64
	2083	CF		0.063	2	0.25	2	8	2	64
	2100	PS		0.063	2	4	0.5	16	2	16
	2101	PS		0.063	4	4	0.5	8	2	128	ermB
	2111	CF		0.063	2	0.25	0.5	2	2	64
	2112	CF		0.063	4	0.5	0.5	0	8	128
	2113	CF		16	64	16	0.5	32	2	16	ermB
	2114	CF		0.063	2	1	0.5	8	2	128	ermB
	2154	CF		0.063	4	1	0.5	0	2	128	ermB
	2155	CF		0.125	2	32	16	16	64	1	tetS
	2158	CF		0.063	0.125	32	32	8	32	128
L. plantarum			Cut-off value	2	8	1	16	64	n.r	32
	2103	FR	MIC	4	8	4	2	512	16	32	bla
	2126	FR		2	8	2	1	32	8	32	cat
	2142	FR		0.125	8	4	1	32	16	64	bla, tetS
L. rhamnosus			Cut-off value	1	4	1	16	64	32	8
	2084	FR	MIC	0.25	4	2	4	32	8	8
P. acidilactici			Cut-off value	1	4	1	16	64	64	4
	2043	CF	MIC	0.032	2	8	16	64	16	16
	2046	FR		0.032	2	8	16	64	16	16

Cut-off values proposed by the EFSA-FEEDAP (2012) and MIC are expressed in μg mL^-1; n.r, not required; number in bold indicate antibiotic resistance. CF, cattle feces; PS, pens soil; FR, feed rations.