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The present study includes the identification of the blow fly Calliphora vicina that forensically important and reared on the different types and amounts of decaying animal tissues, the different effects of the of the qualities and quantities of life on some aspects of the performance for C. vicina fly which included: the weight and period duration development of larval and pupal stage, percentage of adults that have succeeded in the emergence of the pupa casing, for the purpose of investigating the type and quantity of the preferred food for the insect that has all the different stages, according to the results of the current study , the best quantity of food for the larvae of the insect is 25 grams of beef liver each ten larvae which give the highest rate of weight per larva (83.2 mg) , it also increases the speed of development and growth, it also gives the highest percentages of adult emergence with significant difference as a compared with the rest of the other weights, the best animal tissue used as food for the larvae of that insect was lung tissue cow which gives higher larval and pupal weights and high rates of adult emergence with significant differences from the rest of the tissue quality used in the feeding larvae.

Aim: To evaluate the antimicrobial properties of maggots in- vitro. The secretions of maggots are known to have antibacterial properties. To quantify the bactericidal effect of secretions from larvae of L. sericata, an in vitro test model based on the modified European qualitative test. Material and me-thod: In this study, the activity of the maggots was demonstrated against Staphylococcus aureus, Pseu-domonas aeruginosa, Streptococcus group A and group B, and a clinical isolate of MRSA. The num-bers of bacterial colonies with and without maggot exposure were compared after 24, 48 and 72 h of exposure. Results: Maggots applied in the center of the bacterial culture showed a clear zone of inhibi-tion of the bacterial growth in addition the maggot contained viable bacteria after 48 hrs of contact with the respective organisms. Thus, the maggot secretions regarded as an antiseptic against different types of bacteria. In addition, the maggots ability to ingest bacteria was also evaluated. These maggots also continued excreting bacteria. Therefore, maggots should be disposed after use, as they must be re-garded as medical wastes. Conclusions: Complete lyses of the bacteria in the area of maggots applica-tion indicated the antimicrobial properties of maggots.