Probiotics have important role as barrier against the development of pathogenic bacteria and in treatment of bacterial infection of gut system of animals and human. Lactic acid bacteria are the most common microbes used in probiotics. Antibacterial activity is an important characteristic of probiotics. The mechanisms by which lactic acid bacteria exert their effects are multiple. Lactic acid bacteria produce a variety of antagonistic factors that include metabolic end products, antibiotic-like substances and bactericidal proteins, termed bacteriocins. The aim of this study were to compare the antimicrobial activity of different probiotics against bacterial strains Salmonella Enteritidis and enteropathogenic E. coli isolated from poultry.

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