At present,the extract of housefly(Musca domestica) larvae was studied by an agar well diffusion assay for detection of antimicrobial activity,treatment with protease K and capillary electrophoresis.The result indicated that the extract inhibited six tested bacterial pathogens and Escherichia coli Jm109,while Gram-positive bacteria was more sensitive than Gram-negative bacteria,and the induced group showed stronger activity than the non-induced group.The capillary electropgoresis showed that the induced gro...