Evidence map›Paper›PMID 34232708›Full record

ArticleJournal of clinical microbiology2021

Indeterminate QuantiFERON Gold Plus Results Reveal Deficient Interferon Gamma Responses in Severely Ill COVID-19 Patients.

Jeremy D Ward, Caleb Cornaby, John L Schmitz

Abstract read
In one paragraph

Article in Journal of clinical microbiology, 2021. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 31 papers.

0numbers the graph read from it
0cells of the map it votes in
31citing 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

31 citing papers in PubMed.

  1. The effect of BCG vaccination on infection and antibody levels against SARS-CoV-2-The results of ProBCG: a multicenter randomized clinical trial in Brazil.International journal of infectious diseases : IJID : official publication of the International Society for Infectious Diseases · 2023
    Trial
  2. Article
  3. Post-COVID-19 tuberculosis in southeastern Spain: incidence, risk factors and the role of latent tuberculosis infection screening.Revista espanola de quimioterapia : publicacion oficial de la Sociedad Espanola de Quimioterapia · 2025
    Article
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  9. Article
  10. Review
  11. ISCCM Position Statement on the Approach to and Management of Critically Ill Patients with Tuberculosis.Indian journal of critical care medicine : peer-reviewed, official publication of Indian Society of Critical Care Medicine · 2024
    Article
  12. Article
  13. Article
  14. Article
  15. Article
  16. Review
  17. Suppressive myeloid cells in SARS-CoV-2 andFrontiers in immunology · 2023
    Article
  18. Immune interaction between SARS-CoV-2 andFrontiers in immunology · 2023
    Review
  19. Article
  20. Article
4 · The record

Corrections and comments

5 · Who and what money

Authors and funding

3 authors.

Jeremy D WardDepartment of Pathology & Laboratory Medicine, UNC School of Medicine, Chapel Hill, North Carolina, USA.
Caleb CornabyImmunology, Histocompatibility and Immunogenetics Laboratories/McLendon Clinical Laboratories UNC Hospitals, Chapel Hill, North Carolina, USA.
John L SchmitzDepartment of Pathology & Laboratory Medicine, UNC School of Medicine, Chapel Hill, North Carolina, USA.ORCID 0000-0002-1425-236X

Funding

No grant is acknowledged in the PubMed record.

6 · The paper itself

Abstract

SARS-CoV-2 is a novel positive-sense single-stranded RNA virus that has caused a recent pandemic. Most patients have a mild disease course, while approximately 20% have moderate to severe disease, often requiring hospitalization and, in some cases, care in the intensive care unit. By investigating a perceived increased rate of indeterminate QuantiFERON-TB Gold Plus results in hospitalized COVID patients, we demonstrate that severely ill COVID-19 patients have at least a 6-fold reduction of interferon gamma (IFN-γ) levels compared to control patients. What is more, over 60% of these severely ill COVID-19 patients' peripheral T cells were found to be unable to produce measurable IFN-γ when stimulated with phytohemagglutinin (PHA), a potent IFN-γ mitogen, reflected by an indeterminate QuantiFERON-TB Gold Plus result. This defect of IFN-γ production was independent of absolute lymphocyte counts and immunosuppressive therapy. It was associated with increased levels of interleukin-6 (IL-6), which was a predictor of patient outcomes for our cohort when measured early in the course of disease. Finally, in a subset of COVID-19 patients, we found elevated IL-10 levels in addition to IL-6 elevation. In addition to finding a significant limitation of interferon-gamma release assay (IGRA) testing in severely ill COVID-19 patients, these data provide evidence that many of these patients demonstrate a focused Th2 immune response with inhibition of IFN-γ signaling and, in many cases, significant elevations of IL-6.

Indexed as

COVID-19Latent TuberculosisHumansInterferon-gammaInterferon-gamma Release TestsSARS-CoV-2Interferon-gammaCOVID-19IGRAindeterminateinterferon gammaQuantiFERONSARS-CoV-2

Identifiers

PMID34232708
PMCPMC8451425

What OpenQuestion holds

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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.