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El-Ezz, A. N. M. T., E.A.Tantawy, O. A. Mahdy, and A. A. Derbala, "Studies on Heterophyid infection among some fishes in Egypt.", J. vet. Sci. , vol. 34, pp. 11-29, 2000.
El-Ghayish, A., and O. A. Mahdy, "Studies on Cryptosporidium nasorium in (Tilapia zelli) in Egypt", Assiut Vet.Med.J, vol. 39 (77), pp. 201-209, 1998.
ElMassry, A. A., and O. A. Mahdy, "The fish Makaronhi seuzi (Sarus tumbil) as a new host record for some monogenean parasites in Egypt", The Egyptian journal of Medical science, vol. 18(2), issue 1110-0540, pp. 493-505, 1997.
Essa, M. A. A., M. A. M., and O. A. Mahdy, "Role of stress –induced corticosteroid on the developmwnt of parasitosis in Oreochromis niloticus fish", J. Egypt. Vet. Med. Assoc, vol. vol. 63 (4), pp. 133-153, 2003.