Evidence map›Paper›PMID 31870418›Full record

ArticleBMC infectious diseases2019

Validating a screening agar for linezolid-resistant enterococci.

Guido Werner, Carola Fleige, Ingo Klare, Robert E Weber, Jennifer K Bender

Open access · goldAbstract readValidation Study
In one paragraph

Article in BMC infectious diseases, 2019. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 6 papers.

0numbers the graph read from it
0cells of the map it votes in
6citing papers in PubMed
1.2field-weighted citation impact, top 22% 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

6 citing papers in PubMed, 11 citations in OpenAlex.

  1. Article
  2. Performance of CHROMAgar™ LIN-R screening medium for the detection of linezolid-resistant enterococci in Croatian tertiary care hospital.European journal of clinical microbiology & infectious diseases : official publication of the European Society of Clinical Microbiology · 2025
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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

5 authors at 1 institution in 1 country.

Guido WernerDivision Nosocomial Pathogens and Antibiotic Resistances, Department of Infectious Diseases, National Reference Centre for Staphylococci and Enterococci (NRC), Robert Koch Institute, Wernigerode Branch, Wernigerode, Germany. wernerg@rki.de.ORCID http://orcid.org/0000-0002-5081-151X
Carola FleigeDivision Nosocomial Pathogens and Antibiotic Resistances, Department of Infectious Diseases, National Reference Centre for Staphylococci and Enterococci (NRC), Robert Koch Institute, Wernigerode Branch, Wernigerode, Germany.
Ingo KlareDivision Nosocomial Pathogens and Antibiotic Resistances, Department of Infectious Diseases, National Reference Centre for Staphylococci and Enterococci (NRC), Robert Koch Institute, Wernigerode Branch, Wernigerode, Germany.
Robert E WeberDivision Nosocomial Pathogens and Antibiotic Resistances, Department of Infectious Diseases, National Reference Centre for Staphylococci and Enterococci (NRC), Robert Koch Institute, Wernigerode Branch, Wernigerode, Germany.
Jennifer K BenderDivision Nosocomial Pathogens and Antibiotic Resistances, Department of Infectious Diseases, National Reference Centre for Staphylococci and Enterococci (NRC), Robert Koch Institute, Wernigerode Branch, Wernigerode, Germany.
Robert Koch Institute · DE

Funding

No grant is acknowledged in the PubMed record.

6 · The paper itself

Abstract

backgroundLinezolid is an alternative treatment option for infections with multidrug-resistant Gram-positive bacteria including vancomycin-resistant enterococci. Some countries report an increasing number of isolates with resistance to linezolid. The recent publication of the Commission for Hospital Hygiene in Germany on enterococci/VRE recommends screening for linezolid-resistant enterococci (LRE). However, a suitable selective medium or a genetic test is not available. Our aim was to establish a selective screening agar for LRE detection and validate its application with a comprehensive collection of clinical LRE and linezolid-susceptible enterococci.

methodsWe decided to combine the selective power of an enterococcal screening agar with a supplementation of linezolid. Several rounds of analyses with reference, control and test strains and under varying linezolid concentrations of a wider and a smaller range were investigated and assessed. The collection of linezolid-resistant enterococcal control strains included isolates with different resistance mechanisms (23S rDNA mutations, cfr(B), optrA, poxtA). Finally, we validated our LRE screening agar with 400 samples sent to our National Reference Centre in 2019.

resultsSeveral rounds of pre-tests and confirmatory analyses favored Enterococcosel® Agar supplemented with a concentration of 2 mg/L linezolid. A 48 h incubation period was essential for accurate identification of LRE strains. Performance of the LRE screening agar revealed a sensitivity of 96.6% and a specificity of 94.4%.

conclusionsHere we describe preparation of a suitable screening agar and a procedure to identify LRE isolates with high accuracy.

Indexed as

Drug Resistance, Multiple, BacterialAgarAnti-Bacterial AgentsFeasibility StudiesGermanyGram-Positive Bacterial InfectionsHumansLinezolidMass ScreeningMicrobial Sensitivity TestsVancomycin-Resistant EnterococciAgarAnti-Bacterial AgentsLinezolidcfr(B)Linezolid resistanceoptrApoxtA

Identifiers

PMID31870418
PMCPMC6929501
OpenAlexW2998550849

What OpenQuestion holds

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LicenceCC BY
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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.