| Specific groups | Primers name | Primer sequence |
| Bifidobacterium | Bif-F | CCTACGGGAGGCAGCAG |
| Bif-R | ATTACCGCGGCTGCTGG | |
| Lactobacillus | Lac-F | AGCAGTAGGGAATCTTCCA |
| Lac-R | ATTTCACCGCTACACATG |