Antimicrobial and Anti-Swarming Effects of Bacteriocins and Biosurfactants from Probiotic Bacterial Strains against Proteus spp.
Goudarzi، Laila نويسنده Department of Microbiology, Faculty of Sciences, Alzahra University, Tehran, Iran. Food Microbiology Research Center, Tehran University of Medical Sciences, Tehran, Iran. Goudarzi, Laila , Kasra Kermanshahi، Rouha نويسنده Department of Microbiology, Faculty of Sciences, Alzahra University, Tehran, Iran. Kasra Kermanshahi, Rouha , Mousavinezhad، Zahra نويسنده Department of Microbiology, Faculty of Sciences, Alzahra University, Tehran, Iran. Mousavinezhad, Zahra , Soltan Dallal، Mohammad Mehdi نويسنده ,
Background: Proteus spp. belongs to the family of Enterobacteriaceae. These bacteria are Gram-negative and motile microorganisms and known as the third most common causes of urinary tract infections. The aim of the current study was to investigate the effects of some secondary metabolites from probiotic strains of Lactobacillus spp. on swarming and growth of Proteus mirabilis and P. vulgaris. Methods: After determination of optimal conditions for the growth and production of antimicrobials, bacteriocins and biosurfactants were partially purified from Lactobacillus culture supernatants. Then, effects of the purified compounds on growth and swarming migration of Proteus spp. were examined in the presence of various concentrations of semi-purified compounds. Results: Results showed that the partially purified bacteriocins inhibited Proteus spp. swarming distance and had a significant reduction on the bacterial growth curves. Biosurfactants in a solvent form did not have any considerable effects on factors produced by Proteus spp. |