
Fig. 1.
The survival of lactic acid bacteria at 1% and 2% bile salts.

Fig. 2.
The resistance of LAB to low pH.
Table I
Antibiotic resistance of Lactobacillus strains.
| Antibiotic inhibition zone diameter [mm ± SD] | ||||||
|---|---|---|---|---|---|---|
| PEN | KAN | TET | ERY | DOX | AMX | |
| L. rhamnosus LOCK 1131 | 27 ± 2.5 (S) | 0 (R) | 34 ± 1.0 (S) | 33 ± 2.5 (S) | 32 ± 2.0 (S) | 21 ± 2.1 (R) |
| L. casei LOCK 1132 | 28 ± 2.5 (S) | 0 (R) | 30 ± 0.6 (S) | 34 ± 1.5 (S) | 33 ± 1.0 (S) | 24 ± 0.6 (IR) |
| L. paracasei LOCK 1133 | 27 ± 6.4 (S) | 0 (R) | 25 ± 1.5 (S) | 25 ± 0.0 (S) | 30 ± 0.6 (S) | 21 ± 1.0 (R) |
Table II
Probiotic properties of Lactobacillus strains.
| Autoaggregation | Coaggregation | Coefficient of adherence to polystyrene | Adherence to Caco-2 cells | |||||
|---|---|---|---|---|---|---|---|---|
| S. Ent. 13076 | S. Typ. 13311 | S. Typ. 14028 | Init. No. | After 2 h | Adherence index | |||
| [log CFU/ml] | ||||||||
| L. rhamnosus LOCK 1131 | 96.1% ± 1.2% | 14.8% ± 0.01% | 84.2% ± 0.01% | 51.8% ± 0.03% | 1.18 ± 0.02 | 8.5 | 7.6 ± 1.1 | 89.8% |
| L. casei LOCK 1132 | 98.2% ± 3.6% | 26.1% ± 0.01% | 58.5% ± 0.01% | −11.1%± 0.01% | 1.22 ± 0.02 | 8.5 | 8.3 ± 0.5 | 98.0% |
| L. paracasei LOCK 1133 | 93.5% ± 0.9% | 41.8% ± 3.4% | 17.8% ± 3.3% | 43.7% ± 2.7% | 1.20 ± 0.07 | 8.0 | 6.3 ± 0.1 | 78.9% |

Fig. 3.
Adherence of Salmonella sp. strains to adenocarcinoma cells Caco-2 in the presence of lactic acid bacteria presented as stimulation/inhibition rate (%).

Fig. 4.
Cytotoxic effect of probiotics’ supernatants on Caco-2 cells in the range of tested dilutions presented as % of control.
Table III
Antagonistic activity of Lactobacillus sp. strains against Salmonella sp. (type of inhibition: +++ strong; ++ moderate; + weak; − no inhibition).
| Salmonella sp. strain | Year of Salmonella acquisition | L. rhamnosus LOCK 1131 | L. casei LOCK 1132 | L. paracasei LOCK 1133 |
|---|---|---|---|---|
| S. Typhimurium ATCC 13311 | +++ | +++ | +++ | |
| S. Typhimurium ATCC 14028 | +++ | +++ | +++ | |
| S. Enteritidis ATCC 13076 | +++ | +++ | +++ | |
| S. Enteritidis 1067/S/09 K-2 | 2009 | + a | + a | +++ b |
| S. Enteritidis 848/S/09 | 2009 | ++ a | + b | ++ a |
| S. Enteritidis Ferma ‘K’ K-9 | 2010 | + a | + a | ++ b |
| S. Enteritidis Woź K-7 | 2010 | + a | ++ a | ++ b |
| S. Enteritidis Ferma ‘K’ K-10 | 2010 | ++ a | + b | ++ a |
| S. Enteritidis Ferma ‘K’ K-11 | 2010 | ++ a | + b | ++ a |
| S. Enteritidis Ferma ‘K’ K-12 | 2010 | + a | + b | + a |
| S. Enteritidis Ferma ‘K’ K-3 | 2010 | + a | ++ b | + a |
| S. Enteritidis Ferma ‘K’ K-4 | 2010 | + a | ++ b | + a |
| S. Enteritidis Ferma ‘K’ K-6 | 2010 | + a | + b | + a |
| S. Enteritidis Ferma ‘K’ K-14 | 2010 | + b | + a | ++ a |
| S. Enteritidis Ferma ‘K’ K-18 | 2010 | ++ a | + ab | + b |
| S. Enteritidis Pac K-piętro | 2010 | + ab | + a | + b |
| S. Enteritidis Woź K-6 | 2010 | + | + | + |
| S. Enteritidis Woź K-9 | 2010 | ++ a | + ab | + b |
| S. Enteritidis 64/S/10 | 2010 | + | + | + |
| S. Enteritidis 249 | 2010 | + | + | + |
| S. Enteritidis 517/S/09 | 2009 | ++ a | + ab | + b |
| S. Enteritidis 571/S/09 | 2009 | + a | + b | ++ c |
| S. Enteritidis 833/S/09 | 2009 | + | + | ++ |
| S. Enteritidis 838/S/09 | 2009 | ++ b | + a | + a |
| S. Enteritidis 838/S/09 B | 2009 | + | + | ++ |
| S. Enteritidis 847/S/09 | 2009 | + a | + a | − b |
| S. Enteritidis 865/S/09 | 2009 | + | + | + |
| S. Enteritidis 866/S/09 | 2009 | + a | − b | + a |
| S. Enteritidis 945/S/09 | 2009 | ++ b | + a | − a |
| S. Enteritidis 975/S/09 | 2009 | + | + | + |
| S. Enteritidis 1013/S/09 K-4 | 2009 | + a | ++ b | + a |
| S. Enteritidis 1014/S/09 K-1 | 2009 | + b | ++ a | + a |
| S. Enteritidis 1021/S/09 | 2009 | ++ b | + a | + a |
| S. Enteritidis 1022/S/09 K-9 | 2009 | ++ a | ++ a | + b |
| S. Enteritidis 1542/S/09 NWJ | 2009 | + ab | + a | + b |
| S. Enteritidis 1044/S/09 K-2 | 2009 | + a | − b | + a |
| S. Enteritidis 1445/S/09 K-46 | 2009 | + | + | + |
| S. Enteritidis 1446/S/09 K-31 | 2009 | ++ b | + a | + a |
| S. Enteritidis 1465/S/09 MEK | 2009 | + a | − b | + a |
| S. Enteritidis 1515/S/09 | 2009 | + a | + ab | + b |
| S. Enteritidis 1535/S/09 NWJ | 2009 | + b | + a | + a |
| S. Enteritidis 1714/09 | 2009 | + | + | + |
| S. Enteritidis 2050/S/09 | 2009 | + a | + ab | + b |
| S. Enteritidis 1085/S/09 MEK | 2009 | ++ a | ++ b | + c |
| S. Enteritidis 1231/S/09 | 2009 | + | + | + |
| S. Enteritidis 1206/S/09 MEK | 2009 | ++ a | + b | − c |
| S. Enteritidis 1171/S/09 | 2009 | a | ++ b | + c |
| S. Enteritidis 1257/S/09 K7 | 2009 | ++ a | ++ b | + c |
| S. Enteritidis 1250/S/09 | 2009 | + a | ++ b | + a |
| S. Enteritidis 1143/S/09 | 2009 | + a | ++ b | ++ ab |
| S. Enteritidis 1422/S/09 MEK | 2009 | + a | ++ b | + c |
| S. Enteritidis 1106/S/09 K-1 | 2009 | + a | + a | ++ b |
| S. Enteritidis 1061/S/09/K-5 | 2009 | ++ b | ++ a | ++ a |
| S. Enteritidis 1067/S/09 K-3 | 2009 | + | ++ | + |
| S. Enteritidis 1573/S/09 NWJ | 2009 | ++ a | ++ b | ++ c |
| S. Enteritidis 1192/S/09 K-8 | 2009 | ++ ab | ++ a | + b |
| S. Enteritidis 1047/S/09 K-1 | 2009 | ++ a | ++ a | + b |
| S. Enteritidis 1545/S/09 MEK | 2009 | + ab | ++ a | + b |
| S. Enteritidis 1048/S/09 K-8 | 2009 | + | + | + |
| S. Enteritidis 1572/S/09 NWJ | 2009 | ++ ab | ++ a | ++ b |
| S. Enteritidis 002PP2014 | 2014 | + a | ++ ab | ++ b |
| S. Enteritidis 004PP2014 | 2014 | + a | ++ b | ++ b |
| S. Enteritidis 005PP2014 | 2014 | ++ a | + b | + c |
| S. Enteritidis 001PP2014 | 2014 | ++ | ++ | ++ |
| S. Enteritidis 006PP2014 | 2014 | + | + | + |
| S. Enteritidis 007PP2014 | 2014 | ++ a | + b | ++ a |
| S. Enteritidis 2149/09 | 2009 | ++ a | + b | ++ a |
| S. Enteritidis 2619/S/10 | 2010 | + b | + a | + a |
| S. Enteritidis 003PP2014 | 2014 | ++ a | + a | ++ b |
| S. Enteritidis 008PP2014 | 2014 | + b | ++ a | ++ a |
| S. Enteritidis 009PP2014 | 2014 | + a | + b | + a |
| S. Enteritidis 010PP2014 | 2014 | + a | + b | + a |
| S. Enteritidis 12617/2/S | 2014 | + a | + a | ++ b |
| S. Enteritidis 12633 | 2014 | + | + | + |
| S. Enteritidis 12961/1 | 2014 | + b | ++ a | ++ a |
| S. Enteritidis 13001 | 2014 | + a | ++ ab | ++ b |
| S. Enteritidis 011PP2014 | 2014 | ++ a | ++ b | ++ ab |
| S. Enteritidis 012PP2014 | 2014 | + a | + a | ++ b |
| S. Enteritidis 014PP2014 | 2014 | + a | + a | ++ b |
| S. Enteritidis 015PP2014 | 2014 | + a | + a | ++ b |
| S. Enteritidis 016PP2015 | 2015 | + a | + a | ++ b |
| S. Enteritidis 017PP2015 | 2015 | ++ a | + b | + ab |
| S. Enteritidis 018PP2015 | 2015 | ++ | ++ | ++ |
| S. Enteritidis 019PP2015 | 2015 | ++ a | + b | + c |
| S. Enteritidis 020PP2016 | 2016 | + | + | + |
| S. Enteritidis 021PP2016 | 2016 | ++ | ++ | ++ |
| S. Enteritidis 022PP2016 | 2016 | + a | + b | ++ a |
| S. Enteritidis 023PP2016 | 2016 | + | ++ | + |
| S. Enteritidis 024PP2016 | 2016 | + a | + b | ++ c |
| S. Enteritidis 025PP2016 | 2016 | + | + | + |
| S. Enteritidis 026PP2016 | 2016 | ++ a | ++ ab | + b |
| S. Enteritidis 027PP2016 | 2016 | ++ a | + b | + c |
| S. Enteritidis 028PP2016 | 2016 | + a | − b | + c |
| S. Enteritidis 029PP2016 | 2016 | + a | + b | + a |
| S. Enteritidis 030PP2016 | 2016 | + a | - b | + a |
| S. Enteritidis 031PP2016 | 2016 | + | + | + |
| S. Enteritidis 032PP2016 | 2016 | ++ a | ++ b | ++ c |
| S. Enteritidis 033PP2016 | 2016 | ++ | ++ | ++ |
| S. Enteritidis 034PP2016 | 2016 | + | + | + |
| S. Enteritidis 035PP2016 | 2016 | ++ a | ++ b | + c |
| S. Enteritidis 036PP2016 | 2016 | ++ | ++ | ++ |
| S. Enteritidis 037PP2016 | 2016 | + a | ++ b | + a |
| S. Enteritidis 038PP2016 | 2016 | ++ a | + b | ++ a |
| S. Enteritidis 039PP2016 | 2016 | ++ | ++ | + |
| S. Enteritidis 040PP2016 | 2016 | ++ a | ++ b | ++ ab |
| S. Enteritidis 041PP2016 | 2016 | ++ b | ++ a | ++ a |
| S. Enteritidis 042PP2016 | 2016 | ++ | ++ | ++ |
| S. Enteritidis 043PP2016 | 2016 | + a | + a | ++ b |
| S. Enteritidis 044PP2016 | 2016 | ++ a | +++ b | ++ a |
| S. Enteritidis 045PP2016 | 2016 | ++ | +++ | ++ |
| S. Enteritidis 046PP2016 | 2016 | + | ++ | + |
| S. Enteritidis 047PP2016 | 2016 | ++ a | ++ b | ++ ab |
| S. Enteritidis 048PP2016 | 2016 | + b | + a | + a |
| S. Enteritidis 049PP2016 | 2016 | ++ a | +++ b | + c |
| S. Enteritidis 050PP2016 | 2016 | ++ a | + a | + b |
| S. Enteritidis 051PP2016 | 2016 | +++ | +++ | +++ |
| S. Enteritidis 53A | 2013 | ++ a | + b | ++ a |
| S. Enteritidis Korczak 28A | 2013 | ++ a | + b | ++ a |
| S. Enteritidis Korczak 32A | 2013 | + | + | + |
| S. Enteritidis Korczak 40A | 2013 | ++ a | + b | + c |
| S. Enteritidis Korczak 41A | 2013 | ++ a | + b | ++ a |
| S. Enteritidis 4050/2014 D09 | 2014 | ++ a | ++ b | ++ ab |
| S. Enteritidis 6537/1/S/14 D09 | 2014 | + a | + b | + ab |
| S. Enteritidis 6670/1/S/14 D09 | 2014 | + a | + a | + b |
| S. Enteritidis 7660/1/D03 | 2014 | + a | + b | + c |
| S. Enteritidis 65/S/10 | 2010 | + a | + ab | + b |
| S. Enteritidis 1KSFA | 2013 | ++ a | + ab | + b |

Fig. 5.
Total antagonistic activity index (IAA) of lactic acid bacteria.