الفهرس 
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Abstract
Firstly,I wish to express my sincere gratitude to ALLAR Who gave me the ability and patience to finish this work. I would like to express my cordial gratitude and my deepest thanks to Prof. Dr. Fawzy Eid Shaaban; Professor of Forensic Medicine and Toxicology, Faculty of Veterinary Medicine, Zagazig University; for his useful suggestion, continuous help and supervision throughout this work. I wish to express my deepest appreciation and sincere gratitude to Prof. Dr. Salah Moselhy Hamz a , Professor of Forensic Medicine and Toxicology and Head of Department of Pharmacology, Forensic Medicine and Toxicology; Faculty of Veterinary Medicine; Zagazig University, for his guidance, good supervision and supplying all facilities for completing this work. I wish to record my cordial thanks and deepest gratitude to Dr. Motawa Easa El-Houseini, Ass. Prof. of Cancer Biology, National Cancer Institute, Cairo University, for his willing assistance, continuous advice and encouragement. I’m greatly appreciated to Prof. Dr. Anisa Mohammed Hanafy, Professor of Pathology and Head of Pathology Department, Faculty of Veterinary Medicine, Zagazig University, for his excellent and continuous advice 1n histopathological examination. I wish to record my thanks and gratitude to Prof. Dr. Peterson S.W., Department of Agriculture Research Services, United States, for supplying with Aspergillus flavus strain and Aflatoxins standard. I wish to record my thanks and gratitude to Dr. Ahmed Said Deyab, Head of Fish Disease and Toxicology Department, Central Laboratory of Fish Researches, Abbassaj for help me in the determination of residual analysis. My deepest thank to all members of Forensic Medicine and Toxicology Department, Faculty of Veterinatry Medicine,’Zagazig University.