It can be concluded that the selected PCs exhibit in vitro antimicrobial activity against E. coli, E. coli O157:H7, S. cholerasuis subsp. cholerasuis, S. paratyphi and S. Enteridis. The sensitivity of the foodborne bacteria to natural PCs depends on bacterial species, the purity and the polyphenol structure of the phenolics as well as the methods used for the experiments. The plant based antimicrobials can be employed as the alternatives for chemical food additives and preservatives since the PCs in the plant extracts have significant inhibitory activity against pathogenic bacteria. However, in order to widely apply PCs as antimicrobials in food systems, their organoleptic impacts, safety and toxicity must be further investigated