摘要：In Northern Nigeria some 11 000 blood films taken from infants were examined for the presence of malaria parasites during the course of WHO field trials of new insecticides. A first film was taken, in most cases, within the first month and the subsequent ones at monthly intervals thereafter. Analyses of the results obtained from these longitudinal studies were made according to the malaria transmission season, and infant parasite incidences were calculated. The incidences thus obtained were found to be valuable in investigating the epidemiological situation in a particular locality, in assessing the effect of congenital immunity and in evaluating the efficacy of insecticidal attack. Full text Full text is available as a scanned copy of the original print version. Get a printable copy (PDF file) of the complete article (1.3M), or click on a page image below to browse page by page. Links to PubMed are also available for Selected References . 255 256 257 258 259 260 261 262 263 264 265
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