1. Department of Plant Protectionm, Faculty of Agriculture, Ain-Shams University, Shoubra El-Khaima, Cairo, Egypt
2. Department of Pathology, Faculty of Veterinary Medicine, Cairo University, Giza, Egypt
3. National Institute of Oceanography and Fisheries, Suez, Egypt
4. Department of Environmental and Industrial Health, School of Public Health, University of Michigan, Ann Arbor, MI, USA