Evidence map›Paper›PMID 25189195›Full record

ArticleParasites & vectors2014

The relapsing fever spirochete Borrelia miyamotoi is cultivable in a modified Kelly-Pettenkofer medium, and is resistant to human complement.

Alex Wagemakers, Anneke Oei, Michelle M Fikrig, Willem R Miellet, Joppe W Hovius

Abstract read
In one paragraph

Article in Parasites & vectors, 2014. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 33 papers.

0numbers the graph read from it
0cells of the map it votes in
33citing papers in PubMed
–field-weighted citation impact
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

33 citing papers in PubMed.

  1. Resistance ofPathogens (Basel, Switzerland) · 2026
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  3. Development of a sequence-basedMicrobial genomics · 2024
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  4. Pathogens (Basel, Switzerland) · 2023
    Review
  5. Article
  6. Article
  7. Frontiers in immunology · 2022
    Article
  8. Review
  9. Article
  10. Article
  11. Microorganisms · 2021
    Review
  12. Article
  13. Pathogenesis of Relapsing Fever.Current issues in molecular biology · 2021
    Review
  14. Article
  15. Article
  16. Emerging Tick-Borne Diseases.Clinical microbiology reviews · 2020
    Review
  17. Evaluation of Disease Causality of RarePathogens (Basel, Switzerland) · 2020
    Review
  18. Article
  19. A newEuro surveillance : bulletin Europeen sur les maladies transmissibles = European communicable disease bulletin · 2019
    Review
  20. Antimicrobial agents and chemotherapy · 2018
    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

5 authors.

Alex Wagemakers
Anneke Oei
Michelle M Fikrig
Willem R Miellet
Joppe W HoviusCenter for Experimental and Molecular Medicine, Academic Medical Center, Meibergdreef 9, 1105 AZ Amsterdam, The Netherlands. lyme@amc.uva.nl.

Funding

No grant is acknowledged in the PubMed record.

6 · The paper itself

Abstract

backgroundBorrelia miyamotoi is a relapsing fever spirochete found in Ixodes ticks in North America, Europe, and Asia, and has recently been found to be invasive in humans. Cultivation of this spirochete has not yet been described, but is important for patient diagnostics and scientific purposes. Host specificity of Borrelia species is dependent on resistance to host complement (serum resistance), and since B. miyamotoi has been identified as a human pathogen we were interested whether B. miyamotoi is resistant to human complement.

methodsWe inoculated B. miyamotoi strains LB-2001 and HT31 in modified-Kelly-Pettenkofer medium with 10% fetal calf serum (MKP-F), and used standard non-laborious Borrelia culture methods to culture the spirochetes. Next, we assessed serum sensitivity by a direct killing assay and a growth inhibition assay.

resultsWe were able to passage B. miyamotoi over 10 times using a standard culture method in MKP-F medium, and found B. miyamotoi to be resistant to human complement. In contrast to B. miyamotoi, Borrelia anserina--a relapsing fever spirochete unrelated to human infection--was serum sensitive.

conclusionsUsing a variation on MKP medium we were able to culture B. miyamotoi, opening the door to in vitro research into this spirochete. In addition, we describe that B. miyamotoi is resistant to human complement, which might play an important role in pathogenesis. We have also found B. anserina to be sensitive to human complement, which might explain why it is not related to human infection. Summarizing, we describe a novel culture method for B. miyamotoi and show it is resistant to human complement.

Indexed as

Bacteriological TechniquesBorreliaComplement System ProteinsCulture MediaHumansTime FactorsComplement System ProteinsCulture Media

Identifiers

PMID25189195
PMCPMC4261524

What OpenQuestion holds

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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.