A multidisciplinary approach to schistosomiasis control in northern Cameroon : with special reference to the role of fish in snail control

This thesis concentrates on the development of effective snail control and reduction of morbidity due to schistosomiasis in and around the Gounougou irrigation scheme, Benue Valley, Northern Cameroon and is the result of field studies carried out from 1987-1991. Part one states the objectives and results of the Lagdo Fishculture Project and outlines the problems encountered and lessons learned in the process of implementation. Part two follows the three levels of the transmission cycle of schistosomiasis. It gives information on the biology of the snail intermediate hosts gained through laboratory testing, the man-water interface gained through a water contact study in two area villages, and the epidemiology of schistosomiasis gained through a study of population structure and schistosomiasis infection in villages on the right bank of the Benue River. Part three concentrates on disease control methods; namely, a review of laboratory experiments in biological control of snails; a discussion of methods, like improved drainage, to reduce man-water contacts and vector breeding sites; and a quantitative analysis of the role of existing health care facilities in schistosomiasis control. Finally, the thesis evaluates the contribution that this research project has made to the understanding and control of schistosomiasis.