No evidence of false-negative Plasmodium falciparum rapid diagnostic results in Monrovia, Liberia
Abstract Background Malaria diagnosis in many malaria-endemic countries relies mainly on the use of rapid diagnostic tests (RDTs). The majority of commercial RDTs used in Africa detect the Plasmodium falciparum histidine-rich protein 2 (PfHRP2). pfhrp2/3 gene deletions can therefore lead to false-ne...
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ftdoajarticles:oai:doaj.org/article:30efedcf722142459208737fdc7d472d 2023-05-15T15:17:46+02:00 No evidence of false-negative Plasmodium falciparum rapid diagnostic results in Monrovia, Liberia Mandella King Alexander E. George Pau Cisteró Christine K. Tarr-Attia Beatriz Arregui Senga Omeonga Haily Chen Ana Meyer García-Sípido Adelaida Sarukhan Quique Bassat Dawoh Peter Lansana Alfredo Mayor 2021-05-01T00:00:00Z https://doi.org/10.1186/s12936-021-03774-3 https://doaj.org/article/30efedcf722142459208737fdc7d472d EN eng BMC https://doi.org/10.1186/s12936-021-03774-3 https://doaj.org/toc/1475-2875 doi:10.1186/s12936-021-03774-3 1475-2875 https://doaj.org/article/30efedcf722142459208737fdc7d472d Malaria Journal, Vol 20, Iss 1, Pp 1-10 (2021) Malaria Liberia Diagnostics Microscopy Rapid diagnostic tests pfhrp2 deletion Arctic medicine. Tropical medicine RC955-962 Infectious and parasitic diseases RC109-216 article 2021 ftdoajarticles https://doi.org/10.1186/s12936-021-03774-3 2022-12-31T06:00:02Z Abstract Background Malaria diagnosis in many malaria-endemic countries relies mainly on the use of rapid diagnostic tests (RDTs). The majority of commercial RDTs used in Africa detect the Plasmodium falciparum histidine-rich protein 2 (PfHRP2). pfhrp2/3 gene deletions can therefore lead to false-negative RDT results. This study aimed to evaluate the frequency of PCR-confirmed, false-negative P. falciparum RDT results in Monrovia, Liberia. Methods PfHRP2-based RDT (Paracheck Pf®) and microscopy results from 1038 individuals with fever or history of fever (n = 951) and pregnant women at first antenatal care (ANC) visit (n = 87) enrolled in the Saint Joseph’s Catholic Hospital (Monrovia) from March to July 2019 were used to assess the frequency of false-negative RDT results. True–false negatives were confirmed by detecting the presence of P. falciparum DNA by quantitative PCR in samples from individuals with discrepant RDT and microscopy results. Samples that were positive by 18S rRNA qPCR but negative by PfHRP2-RDT were subjected to multiplex qPCR assay for detection of pfhrp2 and pfhrp3. Results One-hundred and eighty-six (19.6%) and 200 (21.0%) of the 951 febrile participants had a P. falciparum-positive result by RDT and microscopy, respectively. Positivity rate increased with age and the reporting of joint pain, chills and shivers, vomiting and weakness, and decreased with the presence of coughs and nausea. The positivity rate at first ANC visit was 5.7% (n = 5) and 8% (n = 7) by RDT and microscopy, respectively. Out of 207 Plasmodium infections detected by microscopy, 22 (11%) were negative by RDT. qPCR confirmed absence of P. falciparum DNA in the 16 RDT-negative but microscopy-positive samples which were available for molecular testing. Among the 14 samples that were positive by qPCR but negative by RDT and microscopy, 3 only amplified pfldh, and among these 3 all were positive for pfhrp2 and pfhrp3. Conclusion There is no qPCR-confirmed evidence of false-negative RDT results due to pfhrp2/pfhrp3 deletions ... Article in Journal/Newspaper Arctic Directory of Open Access Journals: DOAJ Articles Arctic Malaria Journal 20 1 |
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Directory of Open Access Journals: DOAJ Articles |
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English |
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Malaria Liberia Diagnostics Microscopy Rapid diagnostic tests pfhrp2 deletion Arctic medicine. Tropical medicine RC955-962 Infectious and parasitic diseases RC109-216 |
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Malaria Liberia Diagnostics Microscopy Rapid diagnostic tests pfhrp2 deletion Arctic medicine. Tropical medicine RC955-962 Infectious and parasitic diseases RC109-216 Mandella King Alexander E. George Pau Cisteró Christine K. Tarr-Attia Beatriz Arregui Senga Omeonga Haily Chen Ana Meyer García-Sípido Adelaida Sarukhan Quique Bassat Dawoh Peter Lansana Alfredo Mayor No evidence of false-negative Plasmodium falciparum rapid diagnostic results in Monrovia, Liberia |
topic_facet |
Malaria Liberia Diagnostics Microscopy Rapid diagnostic tests pfhrp2 deletion Arctic medicine. Tropical medicine RC955-962 Infectious and parasitic diseases RC109-216 |
description |
Abstract Background Malaria diagnosis in many malaria-endemic countries relies mainly on the use of rapid diagnostic tests (RDTs). The majority of commercial RDTs used in Africa detect the Plasmodium falciparum histidine-rich protein 2 (PfHRP2). pfhrp2/3 gene deletions can therefore lead to false-negative RDT results. This study aimed to evaluate the frequency of PCR-confirmed, false-negative P. falciparum RDT results in Monrovia, Liberia. Methods PfHRP2-based RDT (Paracheck Pf®) and microscopy results from 1038 individuals with fever or history of fever (n = 951) and pregnant women at first antenatal care (ANC) visit (n = 87) enrolled in the Saint Joseph’s Catholic Hospital (Monrovia) from March to July 2019 were used to assess the frequency of false-negative RDT results. True–false negatives were confirmed by detecting the presence of P. falciparum DNA by quantitative PCR in samples from individuals with discrepant RDT and microscopy results. Samples that were positive by 18S rRNA qPCR but negative by PfHRP2-RDT were subjected to multiplex qPCR assay for detection of pfhrp2 and pfhrp3. Results One-hundred and eighty-six (19.6%) and 200 (21.0%) of the 951 febrile participants had a P. falciparum-positive result by RDT and microscopy, respectively. Positivity rate increased with age and the reporting of joint pain, chills and shivers, vomiting and weakness, and decreased with the presence of coughs and nausea. The positivity rate at first ANC visit was 5.7% (n = 5) and 8% (n = 7) by RDT and microscopy, respectively. Out of 207 Plasmodium infections detected by microscopy, 22 (11%) were negative by RDT. qPCR confirmed absence of P. falciparum DNA in the 16 RDT-negative but microscopy-positive samples which were available for molecular testing. Among the 14 samples that were positive by qPCR but negative by RDT and microscopy, 3 only amplified pfldh, and among these 3 all were positive for pfhrp2 and pfhrp3. Conclusion There is no qPCR-confirmed evidence of false-negative RDT results due to pfhrp2/pfhrp3 deletions ... |
format |
Article in Journal/Newspaper |
author |
Mandella King Alexander E. George Pau Cisteró Christine K. Tarr-Attia Beatriz Arregui Senga Omeonga Haily Chen Ana Meyer García-Sípido Adelaida Sarukhan Quique Bassat Dawoh Peter Lansana Alfredo Mayor |
author_facet |
Mandella King Alexander E. George Pau Cisteró Christine K. Tarr-Attia Beatriz Arregui Senga Omeonga Haily Chen Ana Meyer García-Sípido Adelaida Sarukhan Quique Bassat Dawoh Peter Lansana Alfredo Mayor |
author_sort |
Mandella King |
title |
No evidence of false-negative Plasmodium falciparum rapid diagnostic results in Monrovia, Liberia |
title_short |
No evidence of false-negative Plasmodium falciparum rapid diagnostic results in Monrovia, Liberia |
title_full |
No evidence of false-negative Plasmodium falciparum rapid diagnostic results in Monrovia, Liberia |
title_fullStr |
No evidence of false-negative Plasmodium falciparum rapid diagnostic results in Monrovia, Liberia |
title_full_unstemmed |
No evidence of false-negative Plasmodium falciparum rapid diagnostic results in Monrovia, Liberia |
title_sort |
no evidence of false-negative plasmodium falciparum rapid diagnostic results in monrovia, liberia |
publisher |
BMC |
publishDate |
2021 |
url |
https://doi.org/10.1186/s12936-021-03774-3 https://doaj.org/article/30efedcf722142459208737fdc7d472d |
geographic |
Arctic |
geographic_facet |
Arctic |
genre |
Arctic |
genre_facet |
Arctic |
op_source |
Malaria Journal, Vol 20, Iss 1, Pp 1-10 (2021) |
op_relation |
https://doi.org/10.1186/s12936-021-03774-3 https://doaj.org/toc/1475-2875 doi:10.1186/s12936-021-03774-3 1475-2875 https://doaj.org/article/30efedcf722142459208737fdc7d472d |
op_doi |
https://doi.org/10.1186/s12936-021-03774-3 |
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Malaria Journal |
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20 |
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1766348002177318912 |