Prevalence of Trypanosome Infection in Oreochromis niloticus and Clarias lazera from Fish Farms and Reservoir of Jebel Aulia Dam in Sudan

The study was conducted to find out the prevalence of trypanosome infection in freshwater fishes Oreochromis niloticus and Carias lazera. The species O. niloticus was collected from the fish farm of the College of Veterinary Medicine (CVMFF) in Sudan University of Science and Technology, Wad Almamoun fish farm (WMFF) and the Reservoir of Jebel Aulia Dam (RJAD) while the species C. lazera was collected from CVMFF and RJAD. From each site, 40 specimens were collected for the study purpose. The prevalence of trypanosome infection in O. niloticus was 60%, 50% and 20% in RJAD, WMFF and CVMFF respectively. While as in case of C. lazera the prevalence was 30% and 0% in the host species collected from RJAD and CVMFF respectively. In case of O. niloticus infection was restricted to those specimens which were within the length ranges of: 18-29, 24-28, and 12-24cm collected from RJAD, WMFF and CVMFF, respectively and within the length range of 27- 45 in C. lazera collected from RJAD.