Antimicrobic Activity of Fruit and Vegetables’ Natural Microflora as a Source of Receiving Biopreservatives

During the researches the microorganisms showing antagonistic activity towards the pathogenic microflora were allocated on the surface of vegetables. After the allocated strains' identification for further researches four strains of the microorganisms which are not pathogenic have been selected: Bacillus stratosphericus , Bacillus endophyticus , Bacillus pumilus , Bacillus subtilis . Antagonistic activity of the chosen strains towards the testing cultures on the solid medium was studied by the diffusive method. Isolates show high inhibitory potential against the pathogens causing various human diseases. It should be noted that all isolates except Bacillus stratosphericus show antagonistic activity towards Salmonella enterica from 25 to 38%, while Bacillus stratosphericus does not inhibit the growth of Bacillus stratosphericus . Strains Bacillus stratosphericus , Bacillus endopheticus , Bacillus subtilis inhibit the development of Alcaligenes faecalis (52-54%). Strains Bacillus endophyticus (18%) and Bacillus pumilus (30%) are inhibitors of P. aeruginosa .