For each sample with LAB counts exceeding 3.2 log CFU/g, 6e10
colonies were picked, and subcultured at 25 C in MRS broth (Difco)
and on MRS agar. Ribotyping was performed as described previously
(Vihavainen et al., 2008) using five probes (Regnault et al.,
1997) targeting the 16S and 23S rRNA encoding genes