Strain-specific probiotic properties of lactic acid bacteria and their interference with human intestinal pathogens invasion

Table 1 Minimum inhibitory concentrations (MIC, mg/l) of the tested LAB strains for nine different antibiotics

	Amp	Van	Gen	Kan	Strep	Ery	Clin	Tetra	Chlo
B. bifidum W23	0.06 [2]	1 [2]	64 [64]	n.r.	32 [128]	0.25 [1]	0.12 [1]	2 [8]	2 [4]
L. acidophilus W37	0.094 [1]	0.5 [2]	1 [16]	32 [64]	3 [16]	0.016 [1]	0.094 [1]	0.38 [4]	1.5 [4]
L. casei W56	0.5 [4]	n.r.	4 [32]	64 [64]	32 [64]	0.25 [1]	0.12 [1]	2 [4]	8 [4]
L. plantarum W21	0.5 [2]	n.r.	8 [16]	64 [64]	n.r.	0.5 [1]	2 [2]	32 [32]	4 [8]
L. rhamnosus W71	4 [4]	n.r.	2 [16]	32 [64]	8 [32]	0.12 [1]	0.5 [1]	1 [8]	4 [4]
L. salivarius W24	1 [4]	n.r.	2 [16]	64 [64]	32 [64]	0.25 [1]	0.25 [1]	4 [8]	4 [4]
L. lactis W58	0.25 [2]	0.25 [4]	2 [32]	8 [64]	16 [32]	0.12 [1]	0.12 [1]	1 [4]	4 [8]

In square brackets are indicated the microbial breakpoint according to the European Food and Safety Authority [19]. Strains with MICs higher that the breakpoint are considered resistant
Amp ampicillin, Van vancomycin, Gen gentamycin, Kan kanamycin, Strep streptomycin, Ery erythromycin, Clin clindamycin, Tetra tetracycline, Chlo chloramphenicol, n.r. not required

ISSN: 1757-4749