Evidence map›Paper›PMID 33599121›Full record

ArticleCurrent protocols2021

In Vitro Cultivation of the Syphilis Spirochete Treponema pallidum.

Diane G Edmondson, Steven J Norris

Erratum issuedOpen access · hybridAbstract read
In one paragraph

Article in Current protocols, 2021. The graph could read no effect estimate from its abstract, so it casts no vote on the map. An erratum has been issued. Cited by 46 papers, 1 of them a synthesis that pooled it.

0numbers the graph read from it
0cells of the map it votes in
46citing papers in PubMed, 1 pooled it
6.0field-weighted citation impact, top 3% 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

46 citing papers in PubMed, 1 synthesis or guideline pooled it, 65 citations in OpenAlex.

  1. Pooled it
  2. Review
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  6. Frontiers in immunology · 2026
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  7. Proteome Analysis of SevenJournal of proteome research · 2025
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  11. Establishment of the Nichols strain as the type strain ofInternational journal of systematic and evolutionary microbiology · 2025
    Review
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  14. Time-course transcriptomics reveals the impact ofFrontiers in microbiology · 2025
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  15. Exploitation of Biodiversity in Bioeconomy: Examples, Opportunities, and Challenges.Advances in biochemical engineering/biotechnology · 2025
    Review
  16. Frontiers in cellular and infection microbiology · 2025
    Article
  17. Article
  18. Article
  19. Review
  20. Article
4 · The record

Corrections and comments

5 · Who and what money

Authors and funding

2 authors at 2 institutions in 1 country.

Diane G EdmondsonDepartment of Pathology and Laboratory Medicine, McGovern Medical School, University of Texas Health Science Center at Houston, Houston, Texas.
Steven J NorrisDepartment of Pathology and Laboratory Medicine, McGovern Medical School, University of Texas Health Science Center at Houston, Houston, Texas.
The University of Texas Health Science Center · USThe University of Texas Health Science Center at Houston · US

Funding

Factors Affecting longterm in vitro culture of Treponema pallidumR01AI141958 · NIAID · UNIVERSITY OF TEXAS HLTH SCI CTR HOUSTON · PI Diane G Edmondson, STEVEN J. NORRIS · 2018 to 2026
$3.9M
National Institute of Allergy and Infectious DiseasesNIAID NIH HHS R01 AI141958NIH HHS R01AI141958
6 · The paper itself

Abstract

For over a century, investigation of Treponema pallidum subsp. pallidum, the spiral-shaped bacterium that causes syphilis, was hindered by an inability to culture the organism in vitro. A recent breakthrough has enabled continuous in vitro growth of this organism in co-culture with mammalian tissue culture cells. This article contains the protocols needed to culture T. pallidum in the standard laboratory environment. In addition, protocols for growing and maintaining the required tissue culture cells, for generating isogenic strains by limiting dilution, and for quantitating T. pallidum by darkfield microscopy are included. © 2021 Wiley Periodicals LLC. Basic Protocol 1: In vitro cultivation of Treponema pallidum Basic Protocol 2: Generation of isogenic strains Support Protocol 1: Alternate harvest procedure Support Protocol 2: Culture of Sf1Ep cells Support Protocol 3: Assessment of T. pallidum number and viability.

Indexed as

SyphilisTreponema pallidumAnimalsSpirochaetalesTreponemacell culturein vitro cultivationlaboratory growthspirochetessyphilisTreponema pallidum

Identifiers

PMID33599121
PMCPMC7986111
OpenAlexW3133060763

What OpenQuestion holds

Textmetadata
LicenceCC BY-NC
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.