E3 PreliminaryPreliminaryPEM unclearReview-NarrativePeer-reviewedMachine draft
[A known virus in animals is suspected in humans. Borna disease virus has been detected in human neuropathy].
Evengård, B, Lipkin, W I · Lakartidningen · 1997
Quick Summary
This review examines Borna disease virus (BDV), a virus found in animals worldwide that can affect the nervous system. Researchers have wondered whether BDV might also infect humans and contribute to conditions like ME/CFS, depression, and schizophrenia. This article summarizes what scientists know about BDV and discusses how it might cause illness in people.
Why It Matters
This study is significant because it brings attention to a potential infectious agent that some researchers suspected might contribute to ME/CFS pathogenesis. Understanding novel viral candidates and their mechanisms could help explain the neurological and immunological aspects of ME/CFS and potentially inform treatment approaches.
Observed Findings
- Borna disease virus is a neurotrophic RNA virus with worldwide distribution affecting warm-blooded animals
- BDV infection in animals can cause both asymptomatic infection and manifest movement and behavioral disturbances
- Several reports have suggested relationships between BDV infection and affective disorders, chronic fatigue syndrome, and schizophrenia
- At least one research center had initiated antiviral therapy trials in patients with affective disorders potentially linked to BDV
Inferred Conclusions
- BDV warrants investigation as a potential human pathogen despite lack of definitive proof of causation in any human disease
- The neurotropic properties of BDV make it biologically plausible as a candidate agent in neuropsychiatric syndromes including ME/CFS
- Future research should focus on clarifying BDV's role in human disease through molecular and epidemiological studies
Remaining Questions
- What is the actual prevalence of BDV infection in ME/CFS patients compared to healthy controls?
- What mechanisms might BDV use to cause or perpetuate fatigue and neurological symptoms in humans?
- Do antiviral therapies targeting BDV improve outcomes in infected patients with ME/CFS or related conditions?
What This Study Does Not Prove
This review does not establish that BDV causes ME/CFS or prove direct causation in humans; it only notes suggested relationships from preliminary reports. The study does not present new diagnostic data, prevalence rates in ME/CFS populations, or definitive evidence that BDV infection leads to human disease. Temporal association or detection alone does not confirm causation.
Tags
Symptom:Cognitive DysfunctionFatigue
Phenotype:Infection-Triggered
Method Flag:Exploratory Only
Metadata
- PMID
- 9445954
- Review status
- Machine draft
- Evidence level
- Early hypothesis, preprint, editorial, or weak support
- Last updated
- 8 April 2026
About the PEM badge: “PEM required” means post-exertional malaise was an explicit required diagnostic criterion for participant inclusion in this study — not that PEM was studied, observed, or discussed. Studies using criteria that do not require PEM (e.g. Fukuda, Oxford) are tagged “PEM not required”. How the atlas works →
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