Studies on Schistosoma japonicum Infection in the Philippines. 1. General Considerations and Epidemiology.

摘要: The geographical location and physical features of the island Leyte in Philippines, where bilharziasis is endemic studies reported here were conducted, are described first part this paper. An account also given climate, soils, vegetation, population rural structure, public health island.The second opens with a brief historical review japonica Philippines up to 1953, when control project was started. objectives project, areas selected, census data sampling used, techniques adopted described. There follows discussion prevalence its relationship age, sex, occupation environment; other common helminthic infections considered. In section on natural history significance bilharziasis, an approach quantitative assessment disease disability method for evaluating economic burden suggested. incidence children 5-9 years reviewed same section. analysis made possible strain differences S. japonicum Leyte, relative role human animal hosts assessed. last deals egg-laying habits japonicum.