Table 2. Bacterial strains commonly found in dairy products and used in this study to optimize and assess the specificity of the qPCR protocol for L. lactis.

Bacterial species	Strain codea
Enterococcus faecalis	BF 14D
Enterococcus faecalis	551D
Enterococcus faecalis	30FE3D
Enterococcus faecalis	30FE4D
Enterococcus faecium	ATCC 19434TN
Enterococcus faecium	37FE2D
Enterococcus faecium	37FE3D
Enterococcus faecium	571D
Enterococcus faecium	Ma F115D
Leuconostoc mesenteroides	Lm 24N
Lactobacillus brevis	CNRZ 734N
Lactobacillus casei	F30Bi4D
Lactobacillus casei	F150AeM5D
Lactobacillus casei shirota	F17MARD
Lactobacillus delbrueckii	c 91D
Lactobacillus delbrueckii	c 91D
Lactobacillus delbrueckii	c 92D
Lactobacillus delbrueckii	c 93D
Lactobacillus delbrueckii	c 94D
Lactobacillus helveticus	m 80N
Lactobacillus helveticus	m 81D
Lactobacillus paracasei	P 95D
Lactobacillus paracasei	P 96D
Lactobacillus paracasei	DSM 5622TN
Lactobacillus plantarum	110 agD
Lactobacillus plantarum	a 810D
Lactobacillus plantarum	Lab7D
Lactobacillus plantarum	ATCC 4008TN
Lactococcus garvieae	DSM 20684N
Lactococcus lactis subsp. cremoris	Fc95D
Lactococcus lactis subsp. cremoris	Fc96D
Lactococcus lactis subsp. lactis	39FL4D
Lactococcus lactis subsp. lactis	39FL3D
Lactococcus lactis subsp. lactis	39FL2D
Lactococcus lactis subsp. lactis	39FL1D
Lactococcus lactis subsp. lactis	DSM 20481TN
Staphylococcus aureus	661D
Staphylococcus aureus	662D
Streptococcus thermophilus	LCM 3D
Streptococcus thermophilus	6C6D
Streptococcus thermophilus	7C6D
Streptococcus thermophilus	8C6D
Streptococcus thermophilus	4C10D
Streptococcus thermophilus	4C16D
Streptococcus thermophilus	6C16D
Streptococcus thermophilus	10C7D
Streptococcus thermophilus	DSM 20617TN
Streptococcus thermophilus	DSM 20617TN

^a D: strains from DISAFA Collection (University of Turin, Italy) isolated from dairy products; N: strains from International Collections.