Letter | Published:

Incidence of Malaria in Tropical Africa

Nature volume 162, page 114 (17 July 1948) | Download Citation



THE conventional ‘parasite-rate' (percentage proportion of children aged 3–10 years in whose blood malaria parasites are detected by a single examination) may be a misleading standard of qualitative measurement giving a distorted idea of the amount of malaria in a locality. But in practice a reduction from 70 to 40 per cent is often claimed to be evidence of effective malaria control, and we are led to believe that a figure of 5 per cent is a splendid achievement indicating a very low malaria incidence.

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  1. 1.

    Ann. Trop. Med. Parasit., 41, 380.

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  1. (Colonial Medical Research Service), Department of Entomology, London School of Hygiene and Tropical Medicine, Keppel Street, W.C.1. April 7.

    • G. A. WALTON


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