STUDY ON SOME BACTERIAL PATHOGENS INFECTED FRESH WATER FISH OREOCHROMIS NILOTICUS FROM JEBEL AULIA RESERVOIR SOUTH OF KHARTOUM, SUDAN

Abstract

This study conducted to investigate some bacteria pathogens infected fish in Jubal Aulia Reservoir south of Khartoum in the Sudan the target fish were selective for examined Oreochromis niloticus family (Tilapia), One hundred in number fresh samples of Oreochromis niloticus collected from the Reservoir in (White Nile) Ranged in length 1140cm and in weight 50- 1during the period 2017- 2019, using standard microbiological methods for investigation and identification microbial bacteria. Aeromonas hydrophila, mycobacterium forutium, Staphylococcus and streptococcus feacium were isolated from eyes, mouth, fines, gills and skin. Results observed total sampls  of fish infected were  (86), Staphylococcus sp record high risk infection rate 42%, Aeromonas hydrophila 24.5 %, streptococcus faecium  23 %,  and ,mycobacterium forutium 10.5 the percentage of bacterial pathogens  100 % and  distribution at all seasons, with different significant change (P≥0.05,0.02,0.04) the study included and focused on culture descriptions and classification general characteristics about  four types  pathogen bacteria isolated. In present finding   observed stress and lesions but no necrosis and mortality rate were recorded due the infection, as for pathogens made fish meat very depreciate hence one of the study recommended that follow up – studies to evaluate the microorganism changes in white Nile to protect economic resources and fish health.