Evidence map›Paper›PMID 27165119›Full record

ArticleMalaria journal2016

Diagnosis of placental malaria in poorly fixed and processed placental tissue.

Yunhao Liu, Jennifer B Griffin, Atis Muehlenbachs, Stephen J Rogerson, Anya J Bailis, Rajni Sharma, David J Sullivan, Antoinette K Tshefu, Sarah H Landis, Jean-Marie M Kabongo and 2 more

Open access · goldAbstract readComparative StudyEvaluation Study
In one paragraph

Article in Malaria journal, 2016. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 7 papers, 1 of them a synthesis that pooled it.

0numbers the graph read from it
0cells of the map it votes in
7citing papers in PubMed, 1 pooled it
0.9field-weighted citation impact, top 19% of its field
1 · What the graph read from it

What it found

Each row is one number read from the abstract, on the scale the paper reported it, with its interval. Left of the dashed line favours the treatment, right favours the comparator. Under each row is the sentence it came from. New to these charts? A ten-minute tutorial.

The abstract states no effect estimate the extractor could read, or names no intervention and outcome on the map, so this paper lights no cell and moves no belief. It is still indexed, cited and linked below.

2 · The registry

The trial behind it

Trials whose registry record cites this paper, or whose number appears in the abstract. A trial that started after this paper was published is citing it as background, not reporting it.

Neither the registry nor the abstract names a trial number. If this is a trial report, that itself is worth knowing.

3 · Its place in the literature

Who cites it

7 citing papers in PubMed, 1 synthesis or guideline pooled it, 10 citations in OpenAlex.

  1. Pooled it
  2. Article
  3. Article
  4. Article
  5. Placental Malaria.Current tropical medicine reports · 2020
    Review
  6. An overview of malaria in pregnancy.Seminars in perinatology · 2019
    Review
  7. Article
4 · The record

Corrections and comments

PubMed lists nothing against this paper. Absence here is not a guarantee, only a check that was made.

5 · Who and what money

Authors and funding

12 authors at 9 institutions in 4 countries.

Yunhao LiuDepartment of Epidemiology, UNC Gillings School of Global Public Health, Chapel Hill, NC, USA. yl6b@live.unc.edu.
Jennifer B GriffinRTI International, Research Triangle Park, NC, USA.
Atis MuehlenbachsDepartment of Pathology, University of Washington, Seattle, WA, USA.
Stephen J RogersonDepartment of Medicine at Peter Doherty Institute, University of Melbourne, Melbourne, Australia.
Anya J BailisDivision of Maternal-Fetal Medicine, Department of Gynecology & Obstetrics, Johns Hopkins University School of Medicine, Baltimore, MD, USA.
Rajni SharmaImmunopathology Laboratory, Johns Hopkins University School of Medicine, Baltimore, MD, USA.
David J SullivanW. Harry Feinstone Department of Molecular Microbiology and Immunology, Bloomberg School of Public Health, Johns Hopkins University, Baltimore, MD, USA.
Antoinette K TshefuKinshasa School of Public Health, Kinshasa, Democratic Republic of the Congo.
Sarah H LandisGlaxo-Smith-Kline, Worldwide Epidemiology, Uxbridge, Middlesex, UK.
Jean-Marie M KabongoDepartment of Medical Biology, Service of Pathology, University of Kinshasa Medical School and University Hospital, Kinshasa, Democratic Republic of the Congo.
Steve M TaylorDivision of Infectious Diseases & International Health and Duke Global Health Institute, Duke University Medical Center, Durham, NC, USA.
Steven R MeshnickDepartment of Epidemiology, UNC Gillings School of Global Public Health, Chapel Hill, NC, USA.
Johns Hopkins University · USDuke Medical Center · USGlaxoSmithKline (United Kingdom) · GBJohns Hopkins Medicine · USMinistry of Public Health · CDPeter Doherty Institute · AURTI International · USUniversity of Kinshasa · CDUniversity of Washington · US

Funding

Training in Infectious Disease Epidemiology (TIDE)T32AI070114 · NIAID · UNIV OF NORTH CAROLINA CHAPEL HILL · PI Brian W Pence · 2007 to 2026
$4.0M
Epidemiological and Spatial Models of Malaria TransmissionR01AI107949 · NIAID · UNIV OF NORTH CAROLINA CHAPEL HILL · PI MESHNICK, STEVEN RICHARD · 2014 to 2018
$2.5M
NIAID NIH HHS R01 AI107949NIAID NIH HHS T32 AI070114
6 · The paper itself

Abstract

backgroundPlacental histopathology has been considered the gold standard for diagnosis of malaria during pregnancy. However, in under-resourced areas placental tissue is often improperly fixed and processed; the resulting formalin pigment is difficult to distinguish from malaria pigment. This study examines two alternative diagnostic methods: polymerase chain reaction (PCR) and a novel immunohistochemistry (IHC)-based method using an antibody against histidine-rich protein 2 (HRP2).

methodsPlacental histopathology from 151 pregnant women in Kinshasa was assessed by two blinded microscopists and compared with peripheral blood PCR and IHC for HRP2. The Cohen's kappa coefficients were calculated to assess the test agreement. The sensitivity and specificity of individual tests were calculated using PCR or IHC as the reference standard as well as latent class analysis (LCA).

resultsPCR and IHC correlated fairly well. The correlation between the two blinded microscopists was poor, as there was widespread formalin pigment. Using LCA, all of the tests had high specificities. The most sensitive test was IHC (67.7 %), with PCR as second-best (56.1 %).

conclusionsPCR and/or IHC are suitable diagnostics when the presence of formalin pigment substantially compromises placental histopathology.

Indexed as

AdolescentAdultDemocratic Republic of the CongoDiagnostic Tests, RoutineFemaleHumansImmunohistochemistryMalariaPlacentaPlacenta DiseasesPolymerase Chain ReactionPregnancyProspective StudiesSensitivity and SpecificityYoung AdultHistopathologyIHCLatent class analysisMalariaMolecular epidemiologyPCR

Identifiers

PMID27165119
PMCPMC4863337
OpenAlexW2389841531

What OpenQuestion holds

Textmetadata
LicenceCC BY
Read underepoch 390

Registered trials

None linked

Read under generation 80e0d062 · epoch 390. Bibliography from PubMed, PubMed Central and OpenAlex; grants from NIH RePORTER; trial links from ClinicalTrials.gov; estimates, votes and beliefs from the OpenQuestion graph.