Abstract
ABSTRACT This study aimed to investigate the in vitro properties of lactic acid bacteria isolated from colostrum samples of goat, sheep and cow. Four isolates of lactic acid bacteria identified through 16S rDNA sequencing were screened for probiotic potential including their enzymatic activities (hemolytic, DNase activity, API ZYM profiling and tolerance to the gastrointestinal conditions), their antimicrobial activities, their adhesion properties through biofilm formation capacity, auto-aggregation and co-aggregation with pathogens bacteria and hydrophobicity. They were also tested for their antibiotic susceptibility and antioxidant power. All the strains (ADG1b Lactobacillus gasseri, ZPana Lactiplantibacillus plantarum, S2ana Enterococcus hirae and ZGana Lactobacillus gasseri) demonstrated probiotic properties and they could resist different gastrointestinal conditions. They displayed good antimicrobial activities. Furthermore, they had high antioxidant power, although strain dependent. The results of this study showed that L. gasseri (ADG1b) is the most promising probiotic.
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