The effect in vitro of six different probiotic strains including:

Lactobacillus acidophilus NCFM,
Lactobacillus salivarius Ls-33,
Lactobacillus paracasei subsp. paracasei YS8866441,
Lactobacillus plantarum Lp-115,
Bifidobacterium bifidum BI-504 and BI-98

was studied on splenic enteroantigen-presenting cells (APC) and CD4(+)CD25(+) T-regulatory cells (Tregs) in splenocyte-T cell proliferation assays.