Evidence map›Paper›PMID 32729451›Full record

SynthesisParasitology2020

A systematic review of the literature on mechanisms of 5-nitroimidazole resistance in

Keonte J Graves, Jan Novak, W Evan Secor, Patricia J Kissinger, Jane R Schwebke, Christina A Muzny

Abstract readSystematic Review
In one paragraph

Synthesis in Parasitology, 2020. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 33 papers, 1 of them a synthesis that pooled it.

0numbers the graph read from it
0cells of the map it votes in
33citing papers in PubMed, 1 pooled it
–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 synthesis or guideline pooled it.

  1. Pooled it
  2. Article
  3. Discovery of thienopyrimidine analog G-18 as a novel anti-trichomonal agent.International journal for parasitology. Drugs and drug resistance · 2026
    Article
  4. Article
  5. Article
  6. Transcriptomic Signatures ofMicroorganisms · 2026
    Article
  7. Review
  8. Review
  9. Article
  10. Article
  11. Article
  12. Article
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  14. Article
  15. Article
  16. Review
  17. Review
  18. Article
  19. Restoration ofInternational journal of molecular sciences · 2024
    Article
  20. Review
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

6 authors.

Keonte J GravesDivision of Infectious Diseases, Department of Medicine, University of Alabama at Birmingham, Birmingham, Alabama, USA.ORCID 0000-0002-8646-3801
Jan NovakDepartment of Microbiology, University of Alabama at Birmingham, Birmingham, Alabama, USA.
W Evan SecorDivision of Parasitic Diseases and Malaria, Center for Global Health, Centers for Disease Control and Prevention, Atlanta, Georgia, USA.
Patricia J KissingerDepartment of Epidemiology, Tulane University School of Public Health and Tropical Medicine, New Orleans, Louisiana, USA.
Jane R SchwebkeDivision of Infectious Diseases, Department of Medicine, University of Alabama at Birmingham, Birmingham, Alabama, USA.
Christina A MuznyDivision of Infectious Diseases, Department of Medicine, University of Alabama at Birmingham, Birmingham, Alabama, USA.

Funding

The UAB Sexually Transmitted Infections Cooperative Research Centers (STI CRC)U19AI113212 · NIAID · UNIVERSITY OF ALABAMA AT BIRMINGHAM · PI GEISLER, WILLIAM M · 2014 to 2018
$10.0M
NIAID NIH HHS U19 AI113212
6 · The paper itself

Abstract

backgroundTrichomonas vaginalis is the most common non-viral sexually transmitted infection. 5-Nitroimidazoles [metronidazole (MTZ) and tinidazole (TDZ)] are FDA-approved treatments. To better understand treatment failure, we conducted a systematic review on mechanisms of 5-nitroimidazole resistance.

methodsPubMed, ScienceDirect and EMBASE databases were searched using keywords Trichomonas vaginalis, trichomoniasis, 5-nitroimidazole, metronidazole, tinidazole and drug resistance. Non-English language articles and articles on other treatments were excluded.

resultsThe search yielded 606 articles, of which 550 were excluded, leaving 58 articles. Trichomonas vaginalis resistance varies and is higher with MTZ (2.2-9.6%) than TDZ (0-2%). Resistance can be aerobic or anaerobic and is relative rather than absolute. Differential expression of enzymes involved in trichomonad energy production and antioxidant defenses affects 5-nitroimidazole drug activation; reduced expression of pyruvate:ferredoxin oxidoreductase, ferredoxin, nitroreductase, hydrogenase, thioredoxin reductase and flavin reductase are implicated in drug resistance. Trichomonas vaginalis infection with Mycoplasma hominis or T. vaginalis virus has also been associated with resistance. Trichomonas vaginalis has two genotypes, with greater resistance seen in type 2 (vs type 1) populations. DISCUSSION: 5-Nitroimidazole resistance results from differential expression of enzymes involved in energy production or antioxidant defenses, along with genetic mutations in the T. vaginalis genome. Alternative treatments outside of the 5-nitroimidazole class are needed.

Indexed as

Drug ResistanceAntiprotozoal AgentsMetronidazoleTinidazoleTrichomonas vaginalisAntiprotozoal AgentsMetronidazoleTinidazole5-Nitroimidazoledrug resistancemetronidazoletinidazoleTrichomonas vaginalis

Identifiers

PMID32729451
PMCPMC7677174

What OpenQuestion holds

Textmetadata
LicenceTDM
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.