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© Research
Publication : PloS one

High number of previous Plasmodium falciparum clinical episodes increases risk of future episodes in a sub-group of individuals

Scientific Fields
Diseases
Organisms
Applications
Technique

Published in PloS one - 06 Feb 2013

Loucoubar C, Grange L, Paul R, Huret A, Tall A, Telle O, Roussilhon C, Faye J, Diene-Sarr F, Trape JF, Mercereau-Puijalon O, Sakuntabhai A, Bureau JF

Link to Pubmed [PMID] – 23405191

PLoS ONE 2013;8(2):e55666

There exists great disparity in the number of clinical P. falciparum episodes among children of the same age and living in similar conditions. The epidemiological determinants of such disparity are unclear. We used a data-mining approach to explore a nineteen-year longitudinal malaria cohort study dataset from Senegal and identify variables associated with increased risk of malaria episodes. These were then verified using classical statistics and replicated in a second cohort. In addition to age, we identified a novel high-risk group of children in whom the history of P. falciparum clinical episodes greatly increased risk of further episodes. Age and a high number of previous falciparum clinical episodes not only play major roles in explaining the risk of P. falciparum episodes but also are risk factors for different groups of people. Combined, they explain the majority of falciparum clinical attacks. Contrary to what is widely believed, clinical immunity to P. falciparum does not de facto occur following many P. falciparum clinical episodes. There exist a sub-group of children who suffer repeated clinical episodes. In addition to posing an important challenge for population stratification during clinical trials, this sub-group disproportionally contributes to the disease burden and may necessitate specific prevention and control measures.

http://www.ncbi.nlm.nih.gov/pubmed/23405191