Table 4.

Number of resistant Lactobacillus strains determined on the basis of MIC breakpoints established for the antibiotics

	Number of strains
	Do not showing any resistance	Susceptible to one drug only	With multidrug resistancea	Displayed resistance against
				Ampicillin (MIC ≥2 or 4 or 8 μg/ml)	Tetracyclines (MIC ≥8 or 16 or 32 μg/ml)	Macrolides (MIC ≥2 μg/ml)	Lincomycin (MIC ≥16 μg/ml)	Streptomycin (MIC ≥32 or 128 μg/ml)	Gentamicin (MIC ≥16 or 32 μg/ml)	Chloramphenicol (MIC ≥8 μg/ml)	Tiamulin (MIC ≥8 μg/ml)	Enrofloxacin (MIC ≥64 μg/ml)	Macrolides and lincomycin	Streptomycin and gentamicin
L. salivarius (n = 31)	0 (0%)	2 (6%)	27 (87%)	4 (13%)	23 (74%)	18 (58%)	22 (71%)	16 (52%)	6 (19%)	16 (52%)	29 (93.5%)	18 (58%)	18 (58%)	4 (13%)
L. agilis (n = 3)	0 (0%)	2 (67%)	1 (33%)	0 (0%)	1 (33%)	0 (0%)	1 (33%)	1 (33%)	1 (33%)	0 (0%)	2 (67%)	1 (33%)	0 (0%)	1 (33%)
L. johnsoni (n = 21)	0 (0%)	3 (14%)	16 (76%)	6 (28%)	14 (67%)	10 (48%)	14 (67%)	3 (14%)	0 (0%)	2 (9.5%)	21 (100%)	10 (48%)	10 (48%)	0 (0%)
L. crispatus (n = 12)	0 (0%)	0 (0%)	10 (83%)	8 (67%)	9 (75%)	3 (25%)	8 (67%)	2 (17%)	2 (17%)	1 (8%)	12 (100%)	11 (92%)	3 (25%)	1 (8.3%)
L. reuteri (n = 10)	0 (0%)	0 (0%)	9 (90%)	5 (50%)	9 (90%)	4 (40%)	10 (100%)	2 (20%)	0 (0%)	1 (10%)	7 (70%)	1 (10%)	4 (40%)	0 (0%)
L. ingluviei (n = 8)	2 (25%)	0 (0%)	5 (62.5%)	0 (0%)	7 (87%)	1 (12%)	5 (62%)	0 (0%)	0 (0%)	0 (0%)	5 (62.5%)	0 (0%)	1 (12%)	0 (0%)
L. saerimneri (n = 3)	0 (0%)	0 (0%)	2 (67%)	0 (0%)	2 (67%)	1 (33%)	2 (67%)	3 (100%)	2 (67%)	0 (0%)	3 (100%)	1 (33%)	1 (33%)	2 (67%)
Total: 88	2 (2%)	7 (8%)	70 (79.5%)	23 (26%)	65 (74%)	37 (42%)	62 (70%)	27 (31%)	11 (12.5%)	20 (23%)	79 (90%)	42 (48%)	37 (42%)	8 (9%)

^aResistant to at least 3 groups of antimicrobial agents