Pfhrp2 and pfhrp3 polymorphisms in Plasmodium falciparum isolates from Dakar, Senegal: impact on rapid malaria diagnostic tests
Abstract Background An accurate diagnosis is essential for the rapid and appropriate treatment of malaria. The accuracy of the histidine-rich protein 2 (PfHRP2)-based rapid diagnostic test (RDT) Palutop+4® was assessed here. One possible factor contributing to the failure to detect malaria by this t...
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ftdoajarticles:oai:doaj.org/article:9e2f694cd83a4c72bfa7ab2437b3a5fc 2023-05-15T15:17:21+02:00 Pfhrp2 and pfhrp3 polymorphisms in Plasmodium falciparum isolates from Dakar, Senegal: impact on rapid malaria diagnostic tests Wurtz Nathalie Fall Bécaye Bui Kim Pascual Aurélie Fall Mansour Camara Cheikhou Diatta Bakary Fall Khadidiatou Ba Mbaye Pape Saliou Diémé Yaya Bercion Raymond Wade Boubacar Briolant Sébastien Pradines Bruno 2013-01-01T00:00:00Z https://doi.org/10.1186/1475-2875-12-34 https://doaj.org/article/9e2f694cd83a4c72bfa7ab2437b3a5fc EN eng BMC http://www.malariajournal.com/content/12/1/34 https://doaj.org/toc/1475-2875 doi:10.1186/1475-2875-12-34 1475-2875 https://doaj.org/article/9e2f694cd83a4c72bfa7ab2437b3a5fc Malaria Journal, Vol 12, Iss 1, p 34 (2013) Malaria Plasmodium falciparum Diagnosis Rapid diagnostic test Plasmodium falciparum histidine-rich protein 2 Anti-malarial Arctic medicine. Tropical medicine RC955-962 Infectious and parasitic diseases RC109-216 article 2013 ftdoajarticles https://doi.org/10.1186/1475-2875-12-34 2022-12-31T06:55:03Z Abstract Background An accurate diagnosis is essential for the rapid and appropriate treatment of malaria. The accuracy of the histidine-rich protein 2 (PfHRP2)-based rapid diagnostic test (RDT) Palutop+4® was assessed here. One possible factor contributing to the failure to detect malaria by this test is the diversity of the parasite PfHRP2 antigens. Methods PfHRP2 detection with the Palutop+4® RDT was carried out. The pfhrp2 and pfhrp3 genes were amplified and sequenced from 136 isolates of Plasmodium falciparum that were collected in Dakar, Senegal from 2009 to 2011. The DNA sequences were determined and statistical analyses of the variation observed between these two genes were conducted. The potential impact of PfHRP2 and PfHRP3 sequence variation on malaria diagnosis was examined. Results Seven P. falciparum isolates (5.9% of the total isolates, regardless of the parasitaemia; 10.7% of the isolates with parasitaemia ≤0.005% or ≤250 parasites/μl) were undetected by the PfHRP2 Palutop+4® RDT. Low parasite density is not sufficient to explain the PfHRP2 detection failure. Three of these seven samples showed pfhrp2 deletion (2.4%). The pfhrp3 gene was deleted in 12.8%. Of the 122 PfHRP2 sequences, 120 unique sequences were identified. Of the 109 PfHRP3 sequences, 64 unique sequences were identified. Using the Baker’s regression model, at least 7.4% of the P. falciparum isolates in Dakar were likely to be undetected by PfHRP2 at a parasite density of ≤250 parasites/μl (slightly lower than the evaluated prevalence of 10.7%). This predictive prevalence increased significantly between 2009 and 2011 ( P = 0.0046). Conclusion In the present work, 10.7% of the isolates with a parasitaemia ≤0.005% (≤250 parasites/μl) were undetected by the PfHRP2 Palutop+4® RDT (7.4% by the predictive Baker’model). In addition, all of the parasites with pfhrp2 deletion (2.4% of the total samples) and 2.1% of the parasites with parasitaemia >0.005% and presence of pfhrp2 were not detected by PfHRP2 RDT. PfHRP2 is highly polymorphic ... Article in Journal/Newspaper Arctic Directory of Open Access Journals: DOAJ Articles Arctic Malaria Journal 12 1 34 |
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Directory of Open Access Journals: DOAJ Articles |
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ftdoajarticles |
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English |
topic |
Malaria Plasmodium falciparum Diagnosis Rapid diagnostic test Plasmodium falciparum histidine-rich protein 2 Anti-malarial Arctic medicine. Tropical medicine RC955-962 Infectious and parasitic diseases RC109-216 |
spellingShingle |
Malaria Plasmodium falciparum Diagnosis Rapid diagnostic test Plasmodium falciparum histidine-rich protein 2 Anti-malarial Arctic medicine. Tropical medicine RC955-962 Infectious and parasitic diseases RC109-216 Wurtz Nathalie Fall Bécaye Bui Kim Pascual Aurélie Fall Mansour Camara Cheikhou Diatta Bakary Fall Khadidiatou Ba Mbaye Pape Saliou Diémé Yaya Bercion Raymond Wade Boubacar Briolant Sébastien Pradines Bruno Pfhrp2 and pfhrp3 polymorphisms in Plasmodium falciparum isolates from Dakar, Senegal: impact on rapid malaria diagnostic tests |
topic_facet |
Malaria Plasmodium falciparum Diagnosis Rapid diagnostic test Plasmodium falciparum histidine-rich protein 2 Anti-malarial Arctic medicine. Tropical medicine RC955-962 Infectious and parasitic diseases RC109-216 |
description |
Abstract Background An accurate diagnosis is essential for the rapid and appropriate treatment of malaria. The accuracy of the histidine-rich protein 2 (PfHRP2)-based rapid diagnostic test (RDT) Palutop+4® was assessed here. One possible factor contributing to the failure to detect malaria by this test is the diversity of the parasite PfHRP2 antigens. Methods PfHRP2 detection with the Palutop+4® RDT was carried out. The pfhrp2 and pfhrp3 genes were amplified and sequenced from 136 isolates of Plasmodium falciparum that were collected in Dakar, Senegal from 2009 to 2011. The DNA sequences were determined and statistical analyses of the variation observed between these two genes were conducted. The potential impact of PfHRP2 and PfHRP3 sequence variation on malaria diagnosis was examined. Results Seven P. falciparum isolates (5.9% of the total isolates, regardless of the parasitaemia; 10.7% of the isolates with parasitaemia ≤0.005% or ≤250 parasites/μl) were undetected by the PfHRP2 Palutop+4® RDT. Low parasite density is not sufficient to explain the PfHRP2 detection failure. Three of these seven samples showed pfhrp2 deletion (2.4%). The pfhrp3 gene was deleted in 12.8%. Of the 122 PfHRP2 sequences, 120 unique sequences were identified. Of the 109 PfHRP3 sequences, 64 unique sequences were identified. Using the Baker’s regression model, at least 7.4% of the P. falciparum isolates in Dakar were likely to be undetected by PfHRP2 at a parasite density of ≤250 parasites/μl (slightly lower than the evaluated prevalence of 10.7%). This predictive prevalence increased significantly between 2009 and 2011 ( P = 0.0046). Conclusion In the present work, 10.7% of the isolates with a parasitaemia ≤0.005% (≤250 parasites/μl) were undetected by the PfHRP2 Palutop+4® RDT (7.4% by the predictive Baker’model). In addition, all of the parasites with pfhrp2 deletion (2.4% of the total samples) and 2.1% of the parasites with parasitaemia >0.005% and presence of pfhrp2 were not detected by PfHRP2 RDT. PfHRP2 is highly polymorphic ... |
format |
Article in Journal/Newspaper |
author |
Wurtz Nathalie Fall Bécaye Bui Kim Pascual Aurélie Fall Mansour Camara Cheikhou Diatta Bakary Fall Khadidiatou Ba Mbaye Pape Saliou Diémé Yaya Bercion Raymond Wade Boubacar Briolant Sébastien Pradines Bruno |
author_facet |
Wurtz Nathalie Fall Bécaye Bui Kim Pascual Aurélie Fall Mansour Camara Cheikhou Diatta Bakary Fall Khadidiatou Ba Mbaye Pape Saliou Diémé Yaya Bercion Raymond Wade Boubacar Briolant Sébastien Pradines Bruno |
author_sort |
Wurtz Nathalie |
title |
Pfhrp2 and pfhrp3 polymorphisms in Plasmodium falciparum isolates from Dakar, Senegal: impact on rapid malaria diagnostic tests |
title_short |
Pfhrp2 and pfhrp3 polymorphisms in Plasmodium falciparum isolates from Dakar, Senegal: impact on rapid malaria diagnostic tests |
title_full |
Pfhrp2 and pfhrp3 polymorphisms in Plasmodium falciparum isolates from Dakar, Senegal: impact on rapid malaria diagnostic tests |
title_fullStr |
Pfhrp2 and pfhrp3 polymorphisms in Plasmodium falciparum isolates from Dakar, Senegal: impact on rapid malaria diagnostic tests |
title_full_unstemmed |
Pfhrp2 and pfhrp3 polymorphisms in Plasmodium falciparum isolates from Dakar, Senegal: impact on rapid malaria diagnostic tests |
title_sort |
pfhrp2 and pfhrp3 polymorphisms in plasmodium falciparum isolates from dakar, senegal: impact on rapid malaria diagnostic tests |
publisher |
BMC |
publishDate |
2013 |
url |
https://doi.org/10.1186/1475-2875-12-34 https://doaj.org/article/9e2f694cd83a4c72bfa7ab2437b3a5fc |
geographic |
Arctic |
geographic_facet |
Arctic |
genre |
Arctic |
genre_facet |
Arctic |
op_source |
Malaria Journal, Vol 12, Iss 1, p 34 (2013) |
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http://www.malariajournal.com/content/12/1/34 https://doaj.org/toc/1475-2875 doi:10.1186/1475-2875-12-34 1475-2875 https://doaj.org/article/9e2f694cd83a4c72bfa7ab2437b3a5fc |
op_doi |
https://doi.org/10.1186/1475-2875-12-34 |
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Malaria Journal |
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12 |
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