Abstract
Prevalence of gastrointestinal parasite of Clarias gariepinus and Oreochromis niloticus were carried at Biu Dam. Samples were collected for the period of four months (August – November, 2023) and the experiment was carried our using standard scientific methods. Seven parasites belonging to four taxa namely; Cestodes (Diphyllobothrum latum, Taenia saginata), Nematodes (Ancylostoma piscium, Dactylogyrus vastator, Capilliria hepatica), Trematodes (Heterophyes heterophyes) and Protozoan (Trypanosome chagasi) were identified. Nematodes were more prevalent than other taxas during the period of this study. The overall prevalence of the parasites was higher in O. niloticus (60.00%) than C. gariepinus with a prevalence infection rate of 46.67%. Among the organs examined, intestine has the highest prevalence of infection rate than other organs examined in C. gariepinus (46.67%) and O. niloticus (73.33%). Sex showed variation with male C. gariepinus recorded higher prevalence (26.67 %) than the female (20.00%), while O. niloticus was observed to have higher prevalence in female (33.33%) than males (26.67%). It is therefore, recommended that fish from Biu Dam should be properly roasted or cooked before consumptions to serves as precautionary measures to possible zoonotic parasite infestations.