Main Article Content
This study conducted to investigate some bacteria infected fish in Jubal Aulia Reservoir south of Khartoum in the Sudan. One hundred fresh samples from Oreochromis niloticus family of (Tilapia) selective from Jubal Aulia Reservoir (White Nile) ranged in length 11–40 cm and in weight 50; during the period 2017–2019, brachialis, eyes, mouth, and skin investigated to identified type of bacterial infected fishes. Results observed that total samples were infected (81) from hundred samples and identified four types of fish bacterial diseases, the identified bacterial were Aeromonas hydrophila Gram-negative bacteria rod in shape, Staphylococcus, Streptococcus faecium, and Mycobacterium fortuitum Gram-positive bacteria with general prevalence infection 78%, 30.2, 26.2, and 20.3, respectively, and the investigation found that the skin was more infected from other organs with significant change (P ≥ 0.05). The study tends to determine Oreochromis niloticus fishes bacterial diseases distribution at all seasons, winter, summer, and autumn, no with general prevalence infection 78%, 30.2, 26.2, and 20.3, respectively. No bacterial necrosis, deformations, and mortality rate were recorded due to the infection in the present finding that confirms the normality infection for law of fishes leaving in water environment, the study offered some recommendation based on the results of the search.