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© Research
Publication : eLife

Modelling the contribution of the hypnozoite reservoir to Plasmodium vivax transmission

Scientific Fields
Diseases
Organisms
Applications
Technique

Published in eLife - 18 Nov 2014

White MT, Karl S, Battle KE, Hay SI, Mueller I, Ghani AC

Link to Pubmed [PMID] – 25406065

Elife 2014 Nov;3

Plasmodium vivax relapse infections occur following activation of latent liver-stages parasites (hypnozoites) causing new blood-stage infections weeks to months after the initial infection. We develop a within-host mathematical model of liver-stage hypnozoites, and validate it against data from tropical strains of P. vivax. The within-host model is embedded in a P. vivax transmission model to demonstrate the build-up of the hypnozoite reservoir following new infections and its depletion through hypnozoite activation and death. The hypnozoite reservoir is predicted to be over-dispersed with many individuals having few or no hypnozoites, and some having intensely infected livers. Individuals with more hypnozoites are predicted to experience more relapses and contribute more to onwards P. vivax transmission. Incorporating hypnozoite killing drugs such as primaquine into first-line treatment regimens is predicted to cause substantial reductions in P. vivax transmission as individuals with the most hypnozoites are more likely to relapse and be targeted for treatment.

https://www.ncbi.nlm.nih.gov/pubmed/25406065