Ghana's Upper Region provides an excellent example of the beneficial effects of improved water security provided by hand-pump tube wells.
Following a Ghana-Canada bilateral development project that installed some 2500 pumps, protection rates against guinea worm disease may be estimated as 88% in the west, and 96% in the east.
Survey comparisons between ca 1960 and 1990 show that dracunculiasis declined in 32 of a total of 38 areas.
The shadow of guinea worm has been lifted from the land and, in many areas, a true « vanishing » has occurred.
The few areas of disease increase are characterized by the lowest population densities, pioneer settlement for cotton farming, and an absence of bore holes.
Vagaries of development have inadvertently produced disease transformations or « metamorphoses » from dracunculiasis to elephantiasis (lymphatic filariasis) in one area, and to red water disease (schistosomiasis hematobium) in other areas.
Correlative associations between pump densities and guinea worm disease are weakened by the large size of areas for which disease is reported in 1990.
One preliminary finding is that geographical distance to the pump is a stronger influence than demographic pressure on pumps, regarding dracunculiasis.
Diminishing returns on higher pump densities in many areas support the idea of making fuller, safer use of supplementary non-pump water. (...)
Mots-clés Pascal : Puits, Pompe, Qualité eau, Dracunculose, Filariose, Nématodose, Helminthiase, Parasitose, Infection, Homme, Ghana, Afrique, Epidémiologie, Approvisionnement eau, Milieu rural, Programme sanitaire, Nord, Eradication
Mots-clés Pascal anglais : Well, Pump, Water quality, Dracunculosis, Filariosis, Nematode disease, Helminthiasis, Parasitosis, Infection, Human, Ghana, Africa, Epidemiology, Water supply, Rural environment, Sanitary program, North, Eradication
Notice produite par :
Inist-CNRS - Institut de l'Information Scientifique et Technique
Cote : 97-0347383
Code Inist : 002B05E03B4B. Création : 12/09/1997.