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High sensitivity of a novel rapid test for the diagnosis of clinical and subclinical Plasmodium falciparum infections in a high transmission setting in Burundi

Article scientifique 2022 Anglais

Résumé

Abstract Rapid diagnostic tests (RDTs) are a key tool for the diagnosis of malaria infections among febrile and subclinical individuals. Low-density infections, and deletions of the P. falciparum hrp2 / 3 genes (encoding for the HRP2 and HRP3 proteins detected by many RDTs) present challenges for RDT-based diagnosis. The novel Rapigen Biocredit three-band Plasmodium falciparum HRP2/LDH RDT was evaluated among 444 febrile and 468 subclinical individuals in a high transmission setting in Burundi. Results were compared to the AccessBio CareStart HRP2 RDT, and qPCR with a sensitivity of <0.1 parasites/µL blood. Sensitivity among clinical patients was 80.0% (250/313, either of HRP2/LDH positive), compared to 73.2% (229/313) for CareStart ( P =0.048). Among subclinical infections, sensitivity was 72.3% (162/224) compared to 58.5% (131/224) for CareStart ( P =0.003), and reached 88.3% (53/60) in children <15 years. No (0/362) hrp2 and 2/366 hrp3 deletions were observed. In conclusion, the novel RDT showed improved sensitivity for the diagnosis of P. falciparum .

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Niyukuri, D., Sinzinkayo, D., Troth, E., Oduma, C., Barengayabo, M., Ndereyimana, M., Holzschuh, A., Vera-Arias, C., Gebre, Y., Badu, K., Nyandwi, J., Baza, D., Juma, E., Koepfli, C. (2022). High sensitivity of a novel rapid test for the diagnosis of clinical and subclinical Plasmodium falciparum infections in a high transmission setting in Burundi. https://doi.org/10.1101/2022.04.26.22274317

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Auteur(s)

David Niyukuri Denis Sinzinkayo Emma V. Troth Colins O. Oduma Mediatrice Barengayabo Mireille Ndereyimana Aurel Holzschuh Claudia A. Vera-Arias Yilekal Gebre Kingsley Badu Joseph Nyandwi Dismas Baza Elizabeth Juma Cristian Koepfli

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