Cited by 42Malaria Research and ControlHemoglobinopathies and Related DisordersClinical Laboratory Practices and Quality Control

Placental Plasmodium falciparum malaria infection: Operational accuracy of HRP2 rapid diagnostic tests in a malaria endemic setting

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Kyabayinze, Daniel J, Tibenderana, James K, Nassali, Mercy, Tumwine, Lynette K, Riches, Clare, Montague, Mark, Counihan, Helen, Hamade, Prudence +2 more·2011·Malaria Journal

Abstract

BACKGROUND: Malaria has a negative effect on the outcome of pregnancy. Pregnant women are at high risk of severe malaria and severe haemolytic anaemia, which contribute 60-70% of foetal and perinatal losses. Peripheral blood smear microscopy under-estimates sequestered placental infections, therefore malaria rapid diagnostic tests (RDTs) detecting histidine rich protein-2 antigen (HRP-2) in peripheral blood are a potential alternative. METHODS: HRP-2 RDTs accuracy in detecting malaria in pregnancy (MIP >28 weeks gestation) and placental Plasmodium falciparum malaria (after childbirth) were conducted using Giemsa microscopy and placental histopathology respectively as the reference standard. The study was conducted in Mbale Hospital, using the midwives to perform and interpret the RDT results. Discordant results samples were spot checked using PCR techniques. RESULTS: Among 433 febrile women tested, RDTs had a sensitivity of 96.8% (95% CI 92-98.8), specificity of 73.5% (95% CI 67.8-78.6), a positive predictive value (PPV) of 68.0% (95% CI 61.4-73.9), and negative predictive value (NPV) of 97.5% (95% CI 94.0-99.0) in detecting peripheral P. falciparum malaria during pregnancy. At delivery, in non-symptomatic women, RDTs had a 80.9% sensitivity (95% CI 57.4-93.7) and a 87.5% specificity (95%CI 80.9-92.1), PPV of 47.2% (95% CI 30.7-64.2) and NPV of 97.1% (95% CI 92.2-99.1) in detecting placental P. falciparum infections among 173 samples. At delivery, 41% of peripheral infections were detected by microscopy without concurrent placental infection. The combination of RDTs and microscopy improved the sensitivity to 90.5% and the specificity to 98.4% for detecting placental malaria infection (McNemar's X(2)> 3.84). RDTs were not superior to microscopy in detecting placental infection (McNemar's X(2)< 3.84). Presence of malaria in pregnancy and active placental malaria infection were 38% and 12% respectively. Placental infections were associated with poor pregnancy outcome [pre-term, still birth and low birth weight] (aOR = 37.9) and late pregnancy malaria infection (aOR = 20.9). Mosquito net use (aOR 2.1) and increasing parity (aOR 2.7) were associated with lower risk for malaria in pregnancy. CONCLUSION: Use of HRP-2 RDTs to detect malaria in pregnancy in symptomatic women was accurate when performed by midwives. A combination of RDTs and microscopy provided the best means of detecting placental malaria. RDTs were not superior to microscopy in detecting placental infection. With a high sensitivity and specificity, RDTs could be a useful tool for assessing malaria in pregnancy, with further (cost-) effectiveness studies.

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Authors
Kyabayinze, D. J., Tibenderana, J. K., Nassali, M., Tumwine, L. K., Riches, C., Montague, M., Counihan, H., Hamade, P., Van Geertruyden, J.-P., & Meek, S.
Affiliations
  • Malaria Consortium (UG)
  • London School of Hygiene & Tropical Medicine (GB)
  • Mbale Hospital (UG)
  • Malaria Consortium (GB)
Corresponding author
Kyabayinze, Daniel J
Venue
Malaria Journal
Published
2011-10-18
Volume
10
Issue
1
Pages
306-306
ISSN
1475-2875 (ISSN-L)
OpenAlex
W2154122903
Cited by
42
References
49
Citations by year
2025: 5 · 2024: 2 · 2022: 5 · 2021: 2 · 2020: 1 · 2019: 2 · 2018: 4 · 2017: 2 · 2016: 3 · 2015: 4 · 2014: 3 · 2013: 6 · 2012: 3
FWCI
3.76
Type
journal article
Language
en
Open access
Locations
  • Malaria Journal (publishedVersion, cc-by)
  • Europe PMC (PubMed Central) (publishedVersion, cc-by)
  • PubMed Central (publishedVersion, cc-by)
  • PubMed (publishedVersion)
  • DOAJ (DOAJ: Directory of Open Access Journals) (submittedVersion, cc-by-sa)
  • Greater South Information System
Funders
Department for International Development
Topics
  • Health Sciences › Medicine › Public Health, Environmental and Occupational Health › Malaria Research and Control
  • Health Sciences › Medicine › Genetics › Hemoglobinopathies and Related Disorders
  • Health Sciences › Medicine › Physiology › Clinical Laboratory Practices and Quality Control
Keywords
placental malaria, Plasmodium falciparum, malaria in pregnancy, diagnostic accuracy, placental pathology, febrile malaria, pregnancy outcomes, malaria-endemic settings, perinatal mortality
MeSH terms
Adolescent, Adult, Antigens, Protozoan, Blood, Diagnostic Tests, Routine, Female, Humans, Microscopy, Placenta Diseases, Plasmodium falciparum, Pregnancy, Pregnancy Complications, Infectious, Sensitivity and Specificity, Protozoan Proteins, Malaria, Falciparum, Clinical Laboratory Techniques, Young Adult

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