Evidence map›Paper›PMID 20071552›Full record

ArticleJournal of clinical microbiology2010

Clostridium difficile testing in the clinical laboratory by use of multiple testing algorithms.

Susan M Novak-Weekley, Elizabeth M Marlowe, John M Miller, Joven Cumpio, Jim H Nomura, Paula H Vance, Alice Weissfeld

Open access · greenAbstract readComparative StudyEvaluation Study
In one paragraph

Article in Journal of clinical microbiology, 2010. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 79 papers, 5 of them syntheses that pooled it.

0numbers the graph read from it
0cells of the map it votes in
79citing papers in PubMed, 5 pooled it
15.9field-weighted citation impact, top 1% 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

79 citing papers in PubMed, 5 syntheses or guidelines pooled it, 223 citations in OpenAlex.

  1. Evaluation of the Cepheid Xpert C. difficile diagnostic assay: an update meta-analysis.Brazilian journal of microbiology : [publication of the Brazilian Society for Microbiology] · 2021
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  14. Significance of a polymerase chain reaction method in the detection of Clostridioides difficile.Revista espanola de quimioterapia : publicacion oficial de la Sociedad Espanola de Quimioterapia · 2021
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  15. Laboratory Tests for the Diagnosis ofClinics in colon and rectal surgery · 2020
    Review
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  17. European journal of microbiology & immunology · 2019
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19 more citing papers are in PubMed but not listed here.

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

7 authors at 2 institutions in 1 country.

Susan M Novak-WeekleySouthern California Permanente Medical Group, North Hollywood, California 91605, USA. Susan.M.Novak@kp.org
Elizabeth M Marlowe
John M Miller
Joven Cumpio
Jim H Nomura
Paula H Vance
Alice Weissfeld
Dermatology Specialists · USLos Angeles Medical Center · US

Funding

No grant is acknowledged in the PubMed record.

6 · The paper itself

Abstract

The incidence of Clostridium difficile infection (CDI) has risen almost 3-fold in the United States over the past decade, emphasizing the need for rapid and accurate tests for CDI. The Cepheid Xpert C. difficile assay is an integrated, closed, nucleic acid amplification system that automates sample preparation and real-time PCR detection of the toxin B gene (tcdB). A total of 432 stool specimens from symptomatic patients were tested by a glutamate dehydrogenase (GDH) assay, a toxin A and B enzyme immunoassay (EIA), the Xpert C. difficile assay, and a cell culture cytotoxicity neutralization assay (CCCN). The results of these methods, used individually and in combination, were compared to those of toxigenic culture. Results for the Xpert C. difficile assay alone showed a sensitivity, specificity, positive predictive value, and negative predictive value (NPV) of 94.4, 96.3, 84.0, and 98.8%, while the EIA alone gave corresponding values of 58.3, 94.7, 68.9, and 91.9%, respectively. An algorithm using the GDH assay and the EIA (plus the CCCN if the EIA was negative) showed corresponding values of 83.1, 96.7, 83.1, and 96.1%. The Xpert C. difficile assay was statistically superior to the EIA (P, <0.001 by Fisher's exact test) and to the GDH-EIA-CCCN algorithm (P, 0.0363). Combining the GDH and Xpert C. difficile assays lowered both the sensitivity and the NPV of the Xpert assay. The GDH-EIA-CCCN procedure required, on average, 2 days to complete testing on GDH-positive results, while testing by the Xpert C. difficile assay was completed, on average, in less than 1 h. Xpert C. difficile testing yielded the highest sensitivity and NPV, in the least amount of time, of the individual- and multiple-test algorithms evaluated in this study.

Indexed as

AlgorithmsAnimalsBacterial ProteinsBacterial ToxinsBacteriological TechniquesCell Culture TechniquesChlorocebus aethiopsClostridioides difficileClostridium InfectionsEnterotoxinsFecesGlutamate DehydrogenaseHumansImmunoenzyme TechniquesNeutralization TestsPolymerase Chain ReactionBacterial ProteinsBacterial ToxinsEnterotoxinsGlutamate DehydrogenasetcdA protein, Clostridium difficiletoxB protein, Clostridium difficile

Identifiers

PMID20071552
PMCPMC2832460
OpenAlexW2117992341

What OpenQuestion holds

Textmetadata
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.