Evolution of operational research studies and development of a national control strategy against intestinal helminths in Pemba Island, 1988-92

Intestinal helminthic infections in Pemba Island, United Republic of Tanzania, have been perceived as a public health problem for many decades. School surveys in 1988 and 1992 and a community survey in 1991 were carried out to assess the distribution of prevalence and the intensity of these infectio...

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