Evidence map›Paper›PMID 36653846›Full record

ArticleJournal of translational medicine2023

The persistent viral infections in the development and severity of myalgic encephalomyelitis/chronic fatigue syndrome.

Santa Rasa-Dzelzkaleja, Angelika Krumina, Svetlana Capenko, Zaiga Nora-Krukle, Sabine Gravelsina, Anda Vilmane, Lauma Ievina, Yehuda Shoenfeld, Modra Murovska, VirA project

Open access · goldAbstract read
In one paragraph

Article in Journal of translational medicine, 2023. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 28 papers, 2 of them syntheses that pooled it.

0numbers the graph read from it
0cells of the map it votes in
28citing papers in PubMed, 2 pooled it
7.3field-weighted citation impact, top 2% 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

28 citing papers in PubMed, 2 syntheses or guidelines pooled it, 33 citations in OpenAlex.

  1. Recent research in myalgic encephalomyelitis/chronic fatigue syndrome: an evidence map.Health technology assessment (Winchester, England) · 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

10 authors at 2 institutions in 2 countries.

Santa Rasa-DzelzkalejaInstitute of Microbiology and Virology, Rīga Stradiņš University, Riga, Latvia. santa.rasa-dzelzkaleja@rsu.lv.ORCID 0000-0001-6519-7121
Angelika KruminaFaculty of Medicine, Department of Infectology, Rīga Stradiņš University, Riga, Latvia.
Svetlana CapenkoInstitute of Microbiology and Virology, Rīga Stradiņš University, Riga, Latvia.
Zaiga Nora-KrukleInstitute of Microbiology and Virology, Rīga Stradiņš University, Riga, Latvia.
Sabine GravelsinaInstitute of Microbiology and Virology, Rīga Stradiņš University, Riga, Latvia.
Anda VilmaneInstitute of Microbiology and Virology, Rīga Stradiņš University, Riga, Latvia.
Lauma IevinaInstitute of Microbiology and Virology, Rīga Stradiņš University, Riga, Latvia.
Yehuda ShoenfeldZabludowicz Center for Autoimmune Diseases, Sheba Medical Centre, Ramat Gan, Israel.
Modra MurovskaInstitute of Microbiology and Virology, Rīga Stradiņš University, Riga, Latvia.
VirA project
Riga Stradiņš University · LVSheba Medical Center · IL

Funding

No grant is acknowledged in the PubMed record.

6 · The paper itself

Abstract

backgroundMyalgic encephalomyelitis/chronic fatigue syndrome (ME/CFS) is a multifactorial disease with an unexplained aetiology in which viral infections are possible trigger factors. The aim of this study was to determine the involvement of human herpesvirus (HHV)-6A/B, HHV-7, and parvovirus B19 (B19V) in the etiopathogenesis of ME/CFS.

methods200 patients with clinically diagnosed ME/CFS and 150 apparently healthy individuals were enrolled in this study. Single-round, nested, and quantitative real-time polymerase chain reactions (PCR) were used to detect the presence and load of HHV-6A/B, HHV-7, and B19V. HHV-6A and HHV-6B were distinguished by PCR and restriction analysis. Immunoenzymatic assays were applied to estimate the presence of virus-specific antibodies and the level of cytokines.

resultsHHV-6A/B, HHV-7, and B19V specific antibodies were detected among patients and healthy individuals in 92.1% and 76.7%, 84.6% and 93.8%, and 78% and 67.4% of cases. HHV-6B had 99% of HHV-6 positive patients. Latent HHV-6A/B, HHV-7, and B19V infection/co-infection was observed in 51.5% of the patients and 76.7% of the healthy individuals, whereas active-45% of the ME/CFS patients and 8.7% of healthy individuals. HHV-6A/B load in patients with a persistent infection/co-infection in a latent and active phase was 262 and 653.2 copies/10

conclusionsSignificantly more persistent HHV-6A/B, HHV-7, and B19V infection/co-infection in an active phase with a higher viral load and elevated levels of pro- and anti-inflammatory cytokines among patients with ME/CFS than healthy individuals indicate the importance of these infections/co-infections in ME/CFS development. The presence of these infections/co-infections influences the ME/CFS clinical course severity.

Indexed as

CoinfectionFatigue Syndrome, ChronicVirus DiseasesCytokinesHumansInterleukin-10Interleukin-12Persistent InfectionTumor Necrosis Factor-alphaCytokinesInterleukin-10Interleukin-12Tumor Necrosis Factor-alphaHHV-6AHHV-6BHHV-7Human parvovirus B19Myalgic encephalomyelitis/chronic fatigue syndrome,

Identifiers

PMID36653846
PMCPMC9847171
OpenAlexW4317107886

What OpenQuestion holds

Textmetadata
LicenceCC BY
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.