All potential LAB were grown in MRS media containing 5% (w/v)
maltose or LAPTg broth when the microscopic morphology of their
colonies were either bacilli or cocci, respectively. Pediococcus and
Enterococcus strains were grown in LAPTg at 37 C. Indicator strains
were grown as follows: Listeria (L.) innocua ATCC33090 was grown
in Brain Heart Infusion (BHI, Britania, Argentina) at 37 C. Lactobacillus
(Lb.) helveticus ATCC15807, Lb. reuteri ATCC23272, Lb. reuteri
BP83 and Lb. plantarum ATCC8014 were grown in MRS at 37 C.
Escherichia coli and Staphylococcus (S.) aureus were grown in BHI at
37 C. Growth in the corresponding media in the presence of 6.5%
(w/v) NaCl was examined. All strains were maintained at 20 C in
their appropriate media with 15% glycerol.