This was the only Department established by the ABU/RUU/DITA agreement. The cooperation was terminated on 15th October, 1975. The Department is broken into three major sections each with a sectional head: Helminthology section (Dr. O.J. Ajanusi); Protozoology section (Dr. I.A. Lawal) and Entomology section (Pro. R.I.S. Agbede). The current Head of Department is Dr. J. O. Ajanusi
The Department has an enviable collection of teaching materials and efficient audio-visual system. In community service, the department has been recognized for its contribution to the control of livestock parasites by the federal and State Governments. Its expertise has been drawn upon by the Food and Agricultural Organization (FAO), World Health Organization (WHO), Organization of African Unity’s Scientific and Technical Research Committee (OAUSTRC) and the International Atomic Energy Agency (IAEA).