The addition of clindamycin to the MRS agar did not inhibit the
Lactococcus lactis strains in the probiotic cheese. Ammor, Florez,
and Mayo (2007) reported that despite this genus exhibits susceptibility
to different groups of antibiotics, some strains have
shown resistant to clindamycin, as well as bacteria belonging to the
genus Lactobacillus Comparing the results using the culture medium RCA pH 5.3 and
MRS at pH 5.2 (Table 4), we concluded that the components of RCA
are capable of inhibiting the growth of L. acidophilus and
S. thermophilus.