African green monkey origin of the atypical cytopathic 'stealth virus' isolated from a patient with chronic fatigue syndrome.
Martin, W J, Ahmed, K N, Zeng, L C et al. · Clinical and diagnostic virology · 1995 · DOI
Quick Summary
Researchers found a virus in a chronic fatigue syndrome patient that resembled cytomegalovirus but had unusual characteristics. By comparing the virus's genetic code to known viruses in databases, they discovered it was most similar to a virus found in African green monkeys, suggesting this may be its original source.
Why It Matters
This research contributes to understanding potential infectious triggers or cofactors in ME/CFS pathogenesis by identifying a novel cytomegalovirus-like agent and its evolutionary origins. Identifying the source and nature of viruses detected in ME/CFS patients may eventually help clarify disease mechanisms and inform future diagnostic or therapeutic approaches.
Observed Findings
A cytomegalovirus-like stealth virus was isolated from a chronic fatigue syndrome patient.
DNA sequence analysis showed greater homology to simian cytomegalovirus (SCMV) Colburn strain than to human CMV or rhesus CMV.
PCR-based confirmation demonstrated similarity but non-identity between the stealth virus and SCMV.
Genetic comparisons against the entire GenBank database supported African green monkey origin as the most likely viral source.
Inferred Conclusions
The stealth virus isolated from this CFS patient originated from African green monkeys.
The virus represents a novel or atypical variant with zoonotic derivation rather than human or rhesus primate origin.
CFS may involve exposure to viral agents from non-human primate sources.
Remaining Questions
How prevalent is this stealth virus in CFS populations, and is it present in healthy controls?
What is the mechanism of transmission from African green monkeys to humans?
Does the presence of this virus have a causal relationship to ME/CFS symptoms, or is it an incidental finding?
What This Study Does Not Prove
This study does not establish that this stealth virus causes ME/CFS or that it is present in the general ME/CFS population—it describes a single case finding. The presence of a viral sequence does not prove active infection or pathogenic causation, and no causal link between the virus and disease symptoms is demonstrated. The study also does not explain how or when a patient might be exposed to African green monkey viruses.
Tags
Symptom:Fatigue
Phenotype:Infection-Triggered
Method Flag:No ControlsSmall SampleExploratory Only