Table 5.

Biofilm formation properties of probiotic Lactobacillus strains

Lactobacillus strain	Adhesion ± SD to different surfaces *
	polystyrene	glass	gelatine	collagen	porcine mucus
paracasei ŁOCK 1091	1.01 ± 0.15 +	2.44 ± 0.14 ++	7.16 ± 0.16 +++	1.16 ± 0.14 +	1.87 ± 0.07 +
pentosus ŁOCK 1094	1.33 ± 0.12 +	1.18 ± 0.27 +	2.92 ± 0.06 +++	1.23 ± 0.15 +	2.06 ± 0.10 ++
plantarum ŁOCK 0860	1.21 ± 0.10 +	2.15 ± 0.12 ++	8.31 ± 0.28 +++	1.34 ± 0.13 +	2.70 ± 0.09 ++
reuteri ŁOCK 1092	1.14 ± 0.14 +	2.32 ± 0.16 ++	5.50 ± 0.13 +++	1.20 ± 0.14 +	2.02 ± 0.08 ++
rhamnosus ŁOCK 1087	0.95 ± 0.08 -	1.95 ± 0.10 +	6.03 ± 0.24 +++	1.04 ± 0.15 +	2.10 ± 0.12 ++

*Ability of Lactobacillus spp. to adhere to different surfaces and thus forming biofilm was evaluated based on do Carmo et al. (2016). Adherence of the tested sample (A_sample) was compared with adherence of the control (A_control) and strains were classified as follows: “-“non-adherent – A_sample < A_control; “+” weakly adherent – A_control < A_sample ≤ (2 × A_control); “++” moderately adherent – (2 × A_control) < A_sample ≤ (4 × A_control); “+++” strongly adherent – (4 × A_control) < A_sample