RapiGEN BIOCREDIT Malaria Ag RDTs WHO Prequalification Study

Sponsor
Foundation for Innovative New Diagnostics, Switzerland (Other)
Overall Status
Not yet recruiting
CT.gov ID
NCT05085301
Collaborator
University of Khartoum (Other), Eijkman Institute for Molecular Biology (Other)
1,080
4

Study Details

Study Description

Brief Summary

Since their introduction in the late 90's, rapid diagnostic tests (RDTs) have markedly improved our ability to control malaria; yet they have inherent limitations which include low sensitivity in Plasmodium vivax detection and inability to detect hrp2/3 gene deleted Plasmodium falciparum parasites. In addition, the spread of P. falciparum parasites lacking hrp2 gene jeopardizes the long-term use of P. falciparum-specific HRP2-based RDTs.

A partnership between RapiGEN, FIND, and the Bill and Melinda Gates Foundation (BMGF) is addressing these limitations by developing five novel malaria RDTs with improved pLDH and HRP2 detection.

RapiGEN has also developed three novel malaria RDTs - BIOCREDIT Malaria Ag Pf/Pv (pLDH/pLDH), BIOCREDIT Malaria Ag Pf (pLDH/HRP2) and BIOCREDIT Malaria Ag Pf (pLDH) - to address these drawbacks. The BIOCREDIT Malaria Ag Pf/Pv (pLDH/pLDH) is a combo test that detects P. falciparum and P. vivax on a single device. BIOCREDIT Malaria Ag Pf (pLDH/HRP2) targets both PfLDH and HRP2 antigens in P. falciparum; and BIOCREDIT Malaria Ag Pf (pLDH) has improved detection of pLDH in P. falciparum.

In countries with circulation of hrp2/3 deleted P. falciparum malaria parasites or high P. vivax burden, these improved RDTs may be invaluable in malaria elimination.

This study is a prospective and retrospective evaluation of RapiGEN's BIOCREDIT Malaria Ag RDTs in malaria-endemic countries to assess their clinical performance for detection of malaria. The purpose of this study is to provide a high level outline of the study design and conduct to support the collation of a data package for WHO Pre-Qualification proposed study.

Condition or Disease Intervention/Treatment Phase
  • Diagnostic Test: Rapid diagnostic test

Detailed Description

Malaria continues to create a major health burden in the tropics especially in Africa. Introduction of Artemisinin-based combination therapy (ACT) has dramatically improved the outcomes of morbidity and mortality of malaria cases. Introduction of RDTs as well dramatically influenced cases detection hence treatment. The situation in Sudan is not different from the general picture in all Africa and witness great reduction of deaths from malaria since the introduction of ACT in 2005 (1). The national protocol depends now on Giemsa stained slides microcopy or certified RDTs for diagnosis and ACT as first and second line of treatment (2).

Recommendation by World Health Organization (WHO) on parasitological confirmation of malaria cases by microscopy or rapid diagnostic tests (RDTs) before treatment increased the use and availability of RDTs worldwide (3).

Rapid diagnostic tests, since their introduction in the late 90's, have dramatically improved our ability to control malaria. Most RDTs are based on histidine-rich protein 2 (PfHRP2) or lactate dehydrogenase (pLDH), which are present in Plasmodium falciparum only and all human-infecting Plasmodium species respectively (4). However, the gradual spread of hrp2/hrp3-deleted mutants in several endemic countries in South America, Asia and Africa exerts a substantial potential impact on the utility of HRP2-based RDTs for case management in these settings.

Plasmodium lactate dehydrogenase (pLDH), on the other hand, appears as a good alternative to HRP2 as it is an essential protein expressed by all human-infecting Plasmodium species; however, pLDH-based RDTs were shown to perform poorly at low parasitaemia, which is common among patients infected with P. vivax, P. malariae and P. ovale species as well as in asymptomatic infections. Therefore, it is less preferred in endemic-countries. In these settings, malaria microscopy holds its reign as the standard of reference thanks to its low direct cost and ability to detect, quantify, and differentiate malaria parasites. However, it is also labour-intensive, time-consuming and expertise-demanding.

With the aim of addressing these limitations, RapiGEN has developed novel malaria RDTs, in partnership with FIND and the Bill and Melinda Gates Foundation (BMGF). RapiGEN developed BIOCREDIT Malaria Ag Pf/Pv (pLDH/pLDH), BIOCREDIT Malaria Ag Pf (pLDH/HRP2) and BIOCREDIT Malaria Ag Pf.

These may provide added value compared to currently available malaria RDTs, especially in settings where current tests prove to be insufficient due to hrp2 deletion or high burden of

  1. vivax malaria.

Study Design

Study Type:
Observational
Anticipated Enrollment :
1080 participants
Observational Model:
Cohort
Time Perspective:
Other
Official Title:
Clinical Performance of RapiGEN BIOCREDIT Malaria Ag RDTs for Detection of Plasmodium Infections in Patients With Symptoms Suggestive of Malaria
Anticipated Study Start Date :
Oct 1, 2021
Anticipated Primary Completion Date :
Dec 1, 2021
Anticipated Study Completion Date :
Feb 1, 2022

Outcome Measures

Primary Outcome Measures

  1. Point estimates of BIOCREDIT Malaria Ag Pf [2 months]

    Point estimates of diagnostic accuracy characteristics (sensitivity, specificity, NPV, PPV) with 95% confidence intervals for BIOCREDIT Malaria Ag Pf (pLDH/HRP2) and BIOCREDIT Malaria Ag Pf (pLDH) using the reference test (nPCR) as standard of truth for the detection of P. falciparum infections in patients with symptoms suggestive of malaria

  2. Point estimate of BIOCREDIT Malaria Ag Pf/Pv (pLDH/pLDH) [2 months]

    Point estimates of diagnostic accuracy characteristics (sensitivity, specificity, NPV, PPV) with 95% confidence intervals for BIOCREDIT Malaria Ag Pf/Pv (pLDH/pLDH) using the reference test as standard of truth for the detection of P. falciparum and P.vivax infections in patients with symptoms suggestive of malaria

Secondary Outcome Measures

  1. Point estimates of comparator tests [2 months]

    Point estimates of diagnostic accuracy characteristics (sensitivity, specificity, NPV, PPV) with 95% confidence intervals of comparator tests using the reference test as standard of truth for the detection of P. falciparum and, P.vivax infections in patients with symptoms suggestive of malaria

  2. Frequencies of hrp2/3 gene deletions [2 months]

    Frequencies of P. falciparum infections containing HRP2 and/or HRP3 mutations and the impact of those on HRP2-based RDT diagnostic accuracy

Eligibility Criteria

Criteria

Ages Eligible for Study:
5 Years and Older
Sexes Eligible for Study:
All
Accepts Healthy Volunteers:
No
Inclusion Criteria:
  • Aged 5 years old or older

  • Presenting at the study site with fever or a history of fever during the preceding 48 hours

  • Freely agreeing to participate by providing informed consent (and assent, if applicable)

Exclusion Criteria:
  • Presence of symptoms and signs of severe illness and/or central nervous system infections as defined by WHO guidelines

Contacts and Locations

Locations

No locations specified.

Sponsors and Collaborators

  • Foundation for Innovative New Diagnostics, Switzerland
  • University of Khartoum
  • Eijkman Institute for Molecular Biology

Investigators

None specified.

Study Documents (Full-Text)

None provided.

More Information

Publications

None provided.
Responsible Party:
Foundation for Innovative New Diagnostics, Switzerland
ClinicalTrials.gov Identifier:
NCT05085301
Other Study ID Numbers:
  • 7876-2/1
First Posted:
Oct 20, 2021
Last Update Posted:
Oct 20, 2021
Last Verified:
Oct 1, 2021
Individual Participant Data (IPD) Sharing Statement:
Undecided
Plan to Share IPD:
Undecided
Studies a U.S. FDA-regulated Drug Product:
No
Studies a U.S. FDA-regulated Device Product:
No
Additional relevant MeSH terms:

Study Results

No Results Posted as of Oct 20, 2021