Isolated peptides comprising no more than ten amino acids and having anti-bacterial properties are disclosed. In one embodiment the peptides have a consensus amino acid sequence X1X2X3X4X5, wherein X1 and X5 comprise polar amino acids. In another embodiment, the peptides have a consensus amino acid sequence X1X2X3X4X5, wherein X2 and X4 are asparagine (N) residues and X3 is tryptophan (W). Compositions comprising same are also disclosed and uses thereof.