<prompt> Most effective bactericidal system within phagocytes-Lysozyme mediatedLactoferrin mediatedReactive oxygen metabolite mediatedCationic basic protein mediated  <response>: H2O2-MPO-halide system is the most efficient bactericidal system of neutrophils H2O2 is not able to efficiently kill microbes by itself. the azurophilic granules of neutrophils contain the enzyme myeloperoxidase MPO, in the presence of a halide such as Cl-, conves H2O2 to hypochloriteOCl2- which is a potent antimicrobial agent that destroys microbes by halogenation in which the halide is bound covalently to cellular constituents or by oxidation of proteins and lipids lipid peroxidation. NADPH oxidase pathway Robbins pathology 9th ed page 79 