Abstract:
:Interest in mapping the global distribution of malaria is motivated by a need to define populations at risk for appropriate resource allocation and to provide a robust framework for evaluating its global economic impact. Comparison of older and more recent malaria maps shows how the disease has been geographically restricted, but it remains entrenched in poor areas of the world with climates suitable for transmission. Here we provide an empirical approach to estimating the number of clinical events caused by Plasmodium falciparum worldwide, by using a combination of epidemiological, geographical and demographic data. We estimate that there were 515 (range 300-660) million episodes of clinical P. falciparum malaria in 2002. These global estimates are up to 50% higher than those reported by the World Health Organization (WHO) and 200% higher for areas outside Africa, reflecting the WHO's reliance upon passive national reporting for these countries. Without an informed understanding of the cartography of malaria risk, the global extent of clinical disease caused by P. falciparum will continue to be underestimated.
journal_name
Naturejournal_title
Natureauthors
Snow RW,Guerra CA,Noor AM,Myint HY,Hay SIdoi
10.1038/nature03342keywords:
subject
Has Abstractpub_date
2005-03-10 00:00:00pages
214-7issue
7030eissn
0028-0836issn
1476-4687pii
nature03342journal_volume
434pub_type
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