Schistosomiasis: Water Contact Pattern and Snail Infection Rates in Opa Reservoir and Research Farm Ponds in Obafemi Awolowo University, Ile-Ife, Nigeria

O. J. Owojori, S. O. Asaolu and I. E. Ofoezie

International Journal of Zoological Research 2 ( 4 ): 323 - 333 , 2006