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© Research
Publication : The Journal of antimicrobial chemotherapy

Kelch13 mutations in Plasmodium falciparum and risk of spreading in Amazon basin countries.

Scientific Fields
Diseases
Organisms
Applications
Technique

Published in The Journal of antimicrobial chemotherapy - 11 Oct 2021

Mathieu LC, Singh P, Monteiro WM, Magris M, Cox H, Lazrek Y, Melo GC, Marchesini P, Alexandre JSF, Alvarez AM, Demar M, Douine M, Ade MP, Lacerda MVG, Musset L,

Link to Pubmed [PMID] – 34379746

Link to DOI – 10.1093/jac/dkab264

Link to HAL - Pasteur – https://hal.archives-ouvertes.fr/hal-03429601

J Antimicrob Chemother 2021 Oct; 76(11): 2854-2862

The first potential focus for artemisinin resistance in South America was recently confirmed with the presence of the C580Y mutation in the Plasmodium falciparum kelch 13 gene (pfk13) in Guyana.This study aimed to strengthen pfk13 monitoring in the Amazon basin countries, to compile the available data and to evaluate the risk of spreading of mutations.Sanger sequencing was done on 862 samples collected between 1998 and 2019, and a global map of pfk13 genotypes available for this region was constructed. Then, the risk of spreading of mutations based on P. falciparum case importation between 2015 and 2018 within countries of the Amazon basin was evaluated.No additional pfk13 C580Y foci were identified. Few mutations (0.5%, 95% CI = 0.3%-0.8%) in the propeller domain were observed in the general parasite population of this region despite a high proportion of K189T mutations (49.1%, 95% CI = 46.2%-52.0%) in the non-propeller domain. Case information revealed two patterns of intense human migration: Venezuela, Guyana and the Roraima State in Brazil; and French Guiana, Suriname and the Amapá State in Brazil.There are few pfk13 mutant foci, but a high risk of dispersion in the Amazon basin, mainly from the Guiana Shield, proportionate to mining activities. Therefore, access to prompt diagnosis and treatment, and continuous molecular monitoring is essential in these geographical areas.

https://pubmed.ncbi.nlm.nih.gov/34379746