In
Table 4
are shown the MIC values of the 13 selected strains to
antibiotics. Strains were considered resistant when they showed
MIC value higher that the MIC breakpoints established by the Eu-
ropean Food Safety Authority (
EFSA, 2008
). None of the strains
exhibited resistance to penicillin G and rifampicin. On the contrary,
Fig. 2.
Adhesion ability to the Caco2 cell lines of the 13 selected lactobacilli strains and LGG strain. The capacity is calculated as the percentage of adhere
d lactobacilli in relation to
the total number of strains added (log 8
þ
0.3). (Error bars indicate standard deviation from two replications).
Fig. 3.
Hydrophobicity, auto-aggregation and co-aggregation with
E
.
coli
percentage of lactobacilli strains. (Error bars indicate standard deviation from two replication).
C. Caggia et al. / Food Microbiology 50 (2015) 109
e
117
114
all tested strains were resistant to vancomycin (without a speci
fi
c
breakpoint from EFSA). Regarding the antibiotics ampicillin,
streptomycin and kanamycin, 5 strains were resistant to ampicillin,
6 strains to streptomycin, and 6 strains to kanamycin as GG. Most of
the strains, as well as GG, revealed the sensitive to tetracycline and
to chloramphenicol.