Performance of rapid diagnostic tests for imported malaria in clinical practice: results of a national multicenter study

PLoS One. 2013 Sep 30;8(9):e75486. doi: 10.1371/journal.pone.0075486. eCollection 2013.

Abstract

We compared the performance of four rapid diagnostic tests (RDTs) for imported malaria, and particularly Plasmodium falciparum infection, using thick and thin blood smears as the gold standard. All the tests are designed to detect at least one protein specific to P. falciparum (Plasmodium histidine-rich protein 2 (PfHRP2) or Plasmodium LDH (PfLDH)) and one pan-Plasmodium protein (aldolase or Plasmodium LDH (pLDH)). 1,311 consecutive patients presenting to 9 French hospitals with suspected malaria were included in this prospective study between April 2006 and September 2008. Blood smears revealed malaria parasites in 374 cases (29%). For the diagnosis of P. falciparum infection, the three tests detecting PfHRP2 showed high and similar sensitivity (96%), positive predictive value (PPV) (90%) and negative predictive value (NPV) (98%). The PfLDH test showed lower sensitivity (83%) and NPV (80%), despite good PPV (98%). For the diagnosis of non-falciparum species, the PPV and NPV of tests targeting pLDH or aldolase were 94-99% and 52-64%, respectively. PfHRP2-based RDTs are thus an acceptable alternative to routine microscopy for diagnosing P. falciparum malaria. However, as malaria may be misdiagnosed with RDTs, all negative results must be confirmed by the reference diagnostic method when clinical, biological or other factors are highly suggestive of malaria.

Publication types

  • Comparative Study
  • Evaluation Study
  • Multicenter Study
  • Research Support, Non-U.S. Gov't

MeSH terms

  • Antigens, Protozoan / isolation & purification*
  • France / epidemiology
  • Humans
  • Lactate Dehydrogenases / isolation & purification*
  • Malaria, Falciparum / blood
  • Malaria, Falciparum / diagnosis*
  • Malaria, Falciparum / epidemiology*
  • Predictive Value of Tests
  • Prospective Studies
  • Protozoan Proteins / isolation & purification*
  • Sample Size
  • Sensitivity and Specificity

Substances

  • Antigens, Protozoan
  • HRP-2 antigen, Plasmodium falciparum
  • Protozoan Proteins
  • Lactate Dehydrogenases

Grants and funding

The study was supported by a grant from the French Ministry of Health (PHRC AOR06066). The funders had no role in study design, data collection and analysis, decision to publish, or preparation of the manuscript.