Evidence map›Paper›PMID 25961048›Full record

ArticleBioMed research international2015

Detection of tropical fungi in formalin-fixed, paraffin-embedded tissue: still an indication for microscopy in times of sequence-based diagnosis?

Hagen Frickmann, Ulrike Loderstaedt, Paul Racz, Klara Tenner-Racz, Petra Eggert, Alexandra Haeupler, Ralf Bialek, Ralf Matthias Hagen

Open access · hybridAbstract read
In one paragraph

Article in BioMed research international, 2015. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 18 papers.

0numbers the graph read from it
0cells of the map it votes in
18citing papers in PubMed
2.6field-weighted citation impact, top 10% 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

18 citing papers in PubMed, 33 citations in OpenAlex.

  1. Review
  2. Review
  3. Article
  4. Identification ofJournal of fungi (Basel, Switzerland) · 2021
    Article
  5. Article
  6. Review
  7. Diagnosis of Pulmonary Infections Due to Endemic Fungi.Diagnostics (Basel, Switzerland) · 2021
    Review
  8. Article
  9. Biosensors and Diagnostics for Fungal Detection.Journal of fungi (Basel, Switzerland) · 2020
    Review
  10. Article
  11. Article
  12. Article
  13. Review
  14. Article
  15. Article
  16. Article
  17. Article
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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

8 authors at 3 institutions in 1 country.

Hagen FrickmannDepartment of Tropical Medicine at the Bernhard Nocht Institute, German Armed Forces Hospital of Hamburg, Bernhard-Nocht Street 74, 20359 Hamburg, Germany ; Institute for Microbiology, Virology and Hygiene, University Medicine Rostock, Schillingallee 70, 18057 Rostock, Germany.
Ulrike LoderstaedtCentral Laboratory Department/Department of Clinical Chemistry, University Medicine Goettingen, Robert Koch Street 40, 37075 Göttingen, Germany.
Paul RaczDepartment of Infectious Disease Pathology, Bernhard Nocht Institute for Tropical Medicine Hamburg, Bernhard Nocht Street 74, 20359 Hamburg, Germany.
Klara Tenner-RaczDepartment of Infectious Disease Pathology, Bernhard Nocht Institute for Tropical Medicine Hamburg, Bernhard Nocht Street 74, 20359 Hamburg, Germany.
Petra EggertDepartment of Infectious Disease Pathology, Bernhard Nocht Institute for Tropical Medicine Hamburg, Bernhard Nocht Street 74, 20359 Hamburg, Germany.
Alexandra HaeuplerDepartment of Infectious Disease Pathology, Bernhard Nocht Institute for Tropical Medicine Hamburg, Bernhard Nocht Street 74, 20359 Hamburg, Germany.
Ralf BialekLADR GmbH MVZ Dr. Kramer & Kollegen, Lauenburger Straße 67, 21502 Geesthacht, Germany.
Ralf Matthias HagenDepartment of Tropical Medicine at the Bernhard Nocht Institute, German Armed Forces Hospital of Hamburg, Bernhard-Nocht Street 74, 20359 Hamburg, Germany.
Bernhard Nocht Institute for Tropical Medicine · DEUniversity of Göttingen · DEUniversity of Rostock · DE

Funding

No grant is acknowledged in the PubMed record.

6 · The paper itself

Abstract

introductionThe aim of the study was the evaluation of panfungal PCR protocols with subsequent sequence analysis for the diagnostic identification of invasive mycoses in formalin-fixed, paraffin-embedded tissue samples with rare tropical mycoses. MATERIALS AND

methodsFive different previously described panfungal PCR/sequencing protocols targeting 18S and 28S ribosomal RNA gene fragments as well as internal transcribed spacer 1 and 2 fragments were evaluated with a collection of 17 formalin-fixed, paraffin-embedded tissue samples of patients with rare and/or tropical invasive mycoses, comprising chromoblastomycosis, coccidioidomycosis, cryptococcosis, histoplasmosis, mucormycosis, mycetoma/maduromycosis, and rhinosporidiosis, in a proof-of-principle analysis.

resultsThe primers of the panfungal PCRs readily and predominantly reacted with contaminating environmental fungi that had deposited on the paraffin blocks. Altogether three sequence results of histoplasmosis and mycetoma samples that matched the histological assessment were associated with sample age <10 years and virtually without PCR inhibition.

conclusionsThe high risk of amplifying environmental contaminants severely reduces the usefulness of the assessed panfungal PCR/sequencing protocols for the identification of rare and/or tropical mycoses in stored formalin-fixed, paraffin-embedded tissues. Histological assessment remains valuable for such indications if cultural differentiation is impossible from inactivated sample material.

Indexed as

DNA, FungalFormaldehydeFungiHumansMycosesParaffin EmbeddingRNA, Ribosomal, 18SRNA, Ribosomal, 28STissue FixationDNA, FungalFormaldehydeRNA, Ribosomal, 18SRNA, Ribosomal, 28S

Identifiers

PMID25961048
PMCPMC4417575
OpenAlexW2007668525

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Registered trials

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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.