Osman, A. H., E. M. M. F. Hala, A. M. Zakia, A. M. Mahmoud, and et al, "RABBIT'S HEALTH AND ENVIRONMENTAL IMPACTS OF EXPLOITATION TREATED BIODEGRADABLE POLLUTION WATER BY JOHKASOU SYSTEM", Taiwan Veterinary Journal, vol. 44, issue 1, pp. 1-8, 2018.
NaveenKumar, S., M. A. Hassan, M. A. Mahmoud, and A. Al-Ansari, "Betanodavirus infection in reared marine fishes along the Arabian Gulf", Aquacult Int, vol. 25, pp. 1543–1554, 2017.
Hassan, M. A., E. A. Noureldin, M. A. Mahmoud, and N. A. Fita, "Molecular identification and epizootiology of Aeromonas veronii infection among farmed Oreochromis niloticus in Eastern Province, KSA", Egyptian Journal of Aquatic Research, vol. 43, pp. 161-167, 2017.
Mahmoud, M. A., M. Abdelsalam, O. A. Mahdy, H. E. M. F. Miniawy, and et al, "Infectious bacterial pathogens, parasites and pathological correlations of sewage pollution as an important threat to farmed fishes in Egypt", Environmental Pollution, vol. 219, pp. 939-948, 2016.
Hassan, M. A., H. A. M. Osman, and M. A. Mahmoud, "Studies on Dermocystidiosis (Yellow Muscle Disease) among Some Marine Fishes of Arabian Gulf and Red Sea Coast, Jeddah, Saudi Arabia", Middle-East Journal of Scientific Research, vol. 22 , issue 4, pp. 478-487, 2014.
Nisreen, E. M., A. M. Mahmoud, and M. M. Fahmy, "Parasitological and Comparative Pathological Studies on Monogenean Infestation of Cultured Sea Bream ( Sparus aurata , Spariidae) in Egypt", Oceanography, vol. 2, issue 4, pp. 129, 2014.
Hassan., M. A., W. S. Soliman., M. A. Mahmoud., and M. I. Sami Shabeeb Al-Shabeeb, "Prevalence of Bacterial Infections among Cage-Cultured Marine Fishes at the Eastern Province of Saudi Arabia.", Research Journal of Pharmaceutical, Biological and Chemical Sciences , vol. 6, issue 4, pp. 1112-1126, 2015.
Karima, M. F., H. M. Aziza, R. A. Hasnaa, and M. A. Mahmoud, "Inhibition of cadmium- induced genotoxicity and histopathological changes in Nile tilapia fish by Egyptian and Tunisian montmorillonite clay", Ecotoxicology and Environmental safety, vol. 119, issue 2015, pp. 140- 147, 2015.
Hassan, M. A., H. W. Palm, M. A. Mahmoud, and F. A. Jama, "Trypanorhynch cestodes from the musculature of commercial fishes from the Arabian gulf", Arab Gulf Journal of Scientific Research, vol. 20, issue 2, pp. 74-86, 2002. cestodes.pdf
abd elaziz, M., M. Ali, S. yassin, and A. S. raafat and rashad, "Study on the effects of some probiotics on the performance, clinicopathological and histopathological changes of Oreochromis niloticus", Veterinary Medical Journal, vol. 55, no.3, pp. 879-897, 2007. Abstract

The presen study was carried out to evaluate the use of some probiotics on the growth rate of tilapia fishes and to determine its effect on some hematological and histopathological parameters. Two different commercial probiotics which includes biogen and moreyeast were evaluated for 8weeks. In the experiment, fifty Oreochromis niloticus fishes were classified to 3 groups,Group (1): consisted of 20 fishes which fed diet supplemented by biogen at a dose of 2 kg/ton diet. Group (2): consisted of 20 fishes which fed diet supplemented by moreyeast at a dose of 5 kg/ton diet and Group (3): was control group which consisted of 10 fishes fed diet without probiotics. At the end of the experimental period both biogen and moreyeast administrated groups revealed a significant increase in the body weight gain (W.G.). The results showed significant increase in the values of RBCs, PCV and Hb throughout the experimental period except group 1 (received biogen) at the 6th week of experiment comparing to control group. Fish group received moreyeast (Group 2) had the pronounced effect than group 1. Assessment of leukogram revealed significant leukocytosis allover the experimental period in different groups except during the 2nd week in group 2 (received moreyeast) and at the 6th week in both probiotic administrated groups comparing to control group. Fish group received biogen had pronounced effect comparing to moreyeast administrated group. differential leukocytic picture was recorded. Histopathological examination revealed The biogen and moreyeast administerd groups showed marked activation of the melano-macrophage centers which is a component of reticuloendothelial system and hence part of the defensive system of fish indicating immunoenhancment. the study concluded that: The examined probiotic were safe for the Oreochromis niloticus fish.

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