Abstract
The health status of the individuals is determined by the microflora inhabiting the gastrointestinal tract. One way to restore the balance of the gastrointestinal microflora is the use of probiotics on the Lactobacillus strains. Probiotic bacteria must have a set of properties that allow them to compete with pathogens and opportunistic pathogens in the gut. Antimicrobial activity, antibiotic susceptibility, tolerance to bile and salt of Lactobacillus strains (Lactobacillus casei 3 B-RKM 0008, Lactobacillus plantarum 8RA-3 pl B-RKM 0015, Lactobacillus sakei 24a B-RKM 0559) we studied. The results showed that L. casei 3 B-RKM 0008 and L. plantarum 8RA-3 pl B-RKM 0015 showed antagonism toward conditionally pathogenic microorganisms, including Escherichia coli ATCC 25922 B-RKM 447, Staphylococcus aureus 209P B-RKM 0057, Serratia marcescens 221F B-RKM 0059, and Candida albicans ATCC 885-653 Y-RKM 0475. Strains of Lactobacillus were resistant to gentamicin, ofloxacin, ciprofloxacin, levofloxacin, cefotaxime, ceftriaxone, ceftazidime, amicacin. Lactobacillus strains to be able to grow in the bile (0.5-20%) and salt (2-6%). These results suggest that these strains may be used in the future as probiotic cultures for manufacturing of novel synbiotic product.