Oreochromis niloticus L. and Cyprinus carpio as a host for helminthes parasite

Lack of understanding of fish disease is one of the concerns for fisheries expansion in Ethiopia. Parasite infestation leads to losses in nutritional contribution of fish to the diet and loss of the population. The parasitized fish can be served also as a host for fish feeding vertebrates. Consequently reduce farm efficiency and production, which in turn impacts the livelihood of the local people. This study was designed to investigate the status of parasitic infections on Oreochromis niloticus L. and Common carps. Parasitological analysis of Oreochromis niloticus L. and Common carps (n=250) was carried out. Wet mounts of body fragments of the collected fish were examined using compound light microscope at x 10 and x 40 magnification powers. All parasite specimens were preserved in 70% ethanol. 21.2% of the fishes were found to be infected. There was no statistical significant difference (P= 0.11) in the prevalence rate of the parasites between the two fish species. Higher frequency was found in adult compared to juvenile fishes. The intensity was statistically significant (p=0.001) in different body parts. The gut harbors 86% of the parasites which is significantly higher comparing to the other body sites. Physico-chemical conditions of the Lake were suitable for the growth of the parasites. Parasitic infestation could affect palatability, productivity, market and aesthetic value of the fish. Potential public health risk parasites are observed in this finding. It is necessary therefore to eliminate all conditions favorable for parasitic infection.