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Evaluation of histidine-rich proteins 2 and 3 gene deletions in Plasmodium falciparum in endemic areas of the Brazilian Amazon

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2021
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Evaluation of histidine-rich proteins 2 and 3 gene deletions in Plasmodium falciparum in endemic areas of the Brazilian Amazon.pdf (1.328xmlui.dri2xhtml.METS-1.0.size-megabytes)
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http://patua.iec.gov.br//handle/iec/4230
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Góes, Leandro
Siqueira, Nathália Chamma
Peres, José Mário
Nascimento, José Maria
Valle, Suiane
Arcanjo, Ana Ruth
Lacerda, Marcus Vinícius Guimarães de
Blume, Liana
Póvoa, Marinete Marins
Viana, Giselle Maria Rachid
xmlui.dri2xhtml.METS-1.0.item-abstract
Histidine-rich proteins 2 and 3 gene (pfhrp2 and pfhrp3) deletions affect the efficacy of rapid diagnostic tests (RDTs) based on the histidine-rich protein 2 (HRP2), compromising the correct identification of the Plasmodium falciparum species. Therefore, molecular surveillance is necessary for the investigation of the actual prevalence of this phenomenon and the extent of the disappearance of these genes in these areas and other South American countries, thus guiding national malaria control programs on the appropriate use of RDTs. This study aimed to evaluate the pfhrp2 and pfhrp3 gene deletion in P. falciparum in endemic areas of the Brazilian Amazon. Aliquots of DNA from the biorepository of the Laboratory of Basic Research in Malaria, Evandro Chagas Institute, with a positive diagnosis for P. falciparum infection as determined by microscopy and molecular assays, were included. Monoinfection was confirmed by nested-polymerase chain reaction assay, and DNA quality was assessed by amplification of the merozoite surface protein-2 gene (msp2). The pfhrp2 and pfhrp3 genes were amplified using primers for the region between exons 1 and 2 and for all extension of exon 2. Aliquots of DNA from 192 P. falciparum isolates were included in the study, with 68.7% (132/192) from the municipality of Cruzeiro do Sul (Acre) and 31.3% (60/192) from Manaus (Amazonas). Of this total, 82.8% (159/192) of the samples were considered of good quality. In the state of Acre, 71.7% (71/99) showed pfhrp2 gene deletion and 94.9% (94/99) showed pfhrp3 gene deletion, while in the state of Amazonas, 100.0% (60/60) of the samples showed pfhrp2 gene deletion and 98.3% (59/60) showed pfhrp3 gene deletion. Moreover, 79.8% (127/159) of isolates displayed gene deletion. Our findings confirm the presence of a parasite population with high frequencies of pfhrp2 and pfhrp3 gene deletions in the Brazilian Amazon region. This suggests reconsidering the use of HRP2-based RDTs in the Acre and Amazonas states and calls attention to the importance of molecular surveillance and mapping of pfhrp2/pfhrp3 deletions in this area and in other locations in the Amazon region to guarantee appropriate patient care, control and ultimately contribute to achieving P. falciparum malaria elimination
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GÓES, Leandro et al. Evaluation of histidine-rich proteins 2 and 3 gene deletions in Plasmodium falciparum in endemic areas of the Brazilian Amazon. International Journal of Environmental Research and Public Health, v. 18, n. 1, p. 1-9, 2021.
xmlui.dri2xhtml.METS-1.0.item-decsPrimary
Malária falciparum / diagnóstico
Plasmodium falciparum / patogenicidade
Plasmodium falciparum / genética
Deleção de Genes
Histidina / análise
Sensibilidade e Especificidade
Reação em Cadeia da Polimerase / métodos
Testes Imediatos
Cruzeiro do Sul (Acre)
Manaus (AM)
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Instituto Evandro Chagas - SVS - MS - 2007-2018 Rodovia BR316 km 7 sn - Levilandia - 67030-000 - Ananindeua - Para - Brasil.
Licença Creative CommonsEste trabalho está licenciado com uma Licença Creative Commons - Atribuição-NãoComercial 4.0 Internacional
Tel: (55 91) 3214-2191
Email: biblioteca@iec.gov.br / clariceneta@iec.gov.br
 

 

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Instituto Evandro Chagas - SVS - MS - 2007-2018 Rodovia BR316 km 7 sn - Levilandia - 67030-000 - Ananindeua - Para - Brasil.
Licença Creative CommonsEste trabalho está licenciado com uma Licença Creative Commons - Atribuição-NãoComercial 4.0 Internacional
Tel: (55 91) 3214-2191
Email: biblioteca@iec.gov.br / clariceneta@iec.gov.br