“…However, many of those experiments failed since the beliefs, attitudes, behavioral patterns, knowledge and misconceptions of local populations and ecological features inherent to each environment were not taken into consideration (Huang & Manderson 1992, Kloos 1995. These features yielded considerable variations in the epidemiology of schistosomiasis (Huang & Manderson 1992). In addition, up to a certain point, the paradigm of epidemiology becomes insufficient and calls for methodologies used in social and human sciences, as was reported by Huang and Manderson (1992), Kloos (1995) and Schall (1995).…”