Isolation and Purification of an Antibacterial Protein from Immune Induced Haemolymph of American Cockroach, .

Background: Antimicrobial peptides play a role as effectors substances in the immunity of vertebrate and invertebrate hosts. In the current study, antimicrobial peptide was isolated from the haemolymph of the American cockroach, .

Methods: as Gram-positive bacteria and as Gram-negative bacteria were candidate for injection.