Plasmodium falciparum genotyping by microsatellites as a method to distinguish between recrudescent and new infections

Citation:
D’alessandro U, Dujardin J-C, Laurent T, Overmeir CV, Nyachieo A. "Plasmodium falciparum genotyping by microsatellites as a method to distinguish between recrudescent and new infections.". 2005.

Abstract:

In vivo tests for susceptibility to antimalarial drugs require molecular methods to distinguish recrudescence from new infection. The most commonly used DNA markers (merozoite surface proteins [MSPs]) are under immune selective pressure, which might lead to misclassification. We evaluated immunologically neutral microsatellite markers in blood samples collected during a drug efficacy trial in Rwanda. Fifty percent of the infections classified as recrudescent by MSP were classified as new by microsatellite markers. Reciprocally, 23.3% of infections classified as recrudescent by microsatellite markers were identified as new by MSP. In drug efficacy studies, microsatellite markers should complement MSP genotyping to distinguish a recrudescence from a new infection

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