الفهرس 
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Abstract
The current study was designed to explore the impact of water pollution on health status of the most common fish species reared in El Ibrahimia canal and its branches in rural areas at Matay and Benimazar cities, El Minia governorate – Egypt (Map1,2). The fish under investigations were Nile Tilapia (Oreochromis niloticus) and Catfish (Clarias gariepinus). Random water and live fish samples were collected from the targeted area; fishes were subjected to clinical, postmortem investigations. Bacteriological examination from fish lesions and internal organs was carried out. The collected water samples were subjected to detailed water analysis. The fish exhibited massive clinical picture in summer, spring, autumn and winter seasons, respectively. The examined fish showed black discoloration, erosions, exophthalmia, distended abdomen and haemorrhages all over the body parts. The target organs for isolation were liver, Kidney, spleen and muscles. Morphological and biochemical identification of bacterial isolates revealed, Aeromonas hydrophila, A. sobria, Pseudomonas fluorescens, Staphylococcus aureus, Staphylococcus epidermidis, Streptococcus iniae and Enterococcus faecalis.
The physical analysis of the examined water samples showed slight municipal wastewater odor, faint yellowish color, while the chemical analysis revealed that dissolved oxygen (DO) 3mg /Liter, pH of water 7.53, ammonia Nitrogen 60mg/Liter and nitrite nitrogen 15mg/l.
The present study revealed an intimate relationship between water pollution and health status of the inhabitant fish as shown by the clinic-pathological pictures and the microbiological profiles conducted during the present study.