Selecting Bacillus spp. strains having probiotic characteristics isolated from chicken fecal and soil samples in Tra Vinh province

Abstract

7 selected Bacillus spp. isolates were investigated about extracellular enzyme production (amylase, protease), pathogen bacteria inhibition properties (Salmonella enterica), tolerance to acidity of the gastric juice (pH 2.0) and 0.3% of bile salts, adherence ability (autoaggregation), susceptibility to antibiotics (colistin, trimethoprim, streptomycin, ampicillin, tetracyclin, norfloxacin). The results of investigating 7 isolates showed that there were 2 isolates P6.N and P21.N exposed the best
probiotic characteristics.