Clinical Performance of RapiGEN BIOCREDIT Malaria Ag RDTs for Detection of Plasmodium Infections in Patients With Symptoms Suggestive of Malaria
试验速览
- 阶段
- 不适用
- 状态
- 已完成
- 发起方
- 入组人数
- 674
- 试验地点
- 2
- 主要终点
- Point estimate of BIOCREDIT Malaria Ag Pf/Pv (pLDH/pLDH)
研究概览
简要总结
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.
详细描述
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.
研究设计
- 研究类型
- Observational
- 观察模型
- Cohort
- 时间视角
- Other
入排标准
- 年龄范围
- 5 Years 至 —（Child, Adult, Older Adult）
- 性别
- All
- 接受健康志愿者
- 否
入选标准
- •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)
排除标准
- •Presence of symptoms and signs of severe illness and/or central nervous system infections as defined by WHO guidelines
结局指标
主要结局
Point estimate of BIOCREDIT Malaria Ag Pf/Pv (pLDH/pLDH)
时间窗: 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
Point estimates of BIOCREDIT Malaria Ag Pf
时间窗: 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
次要结局
- Point estimates of comparator tests(2 months)
- Frequencies of hrp2/3 gene deletions(2 months)