E2 ModerateModerate confidencePEM unclearCross-SectionalPeer-reviewedMachine draft
Comparison of coxsackie B neutralisation and enteroviral PCR in chronic fatigue patients.
Nairn, C, Galbraith, D N, Clements, G B · Journal of medical virology · 1995 · DOI
Quick Summary
Researchers tested whether two different methods of detecting enterovirus (a type of virus) could identify it in ME/CFS patients. One method looked for antibodies (immune proteins) the body makes against Coxsackie B virus, while the other used PCR to directly detect viral genetic material. They found that the PCR test was better at distinguishing ME/CFS patients from healthy people, but the antibody test could not tell the two groups apart.
Why It Matters
This research directly addresses whether enterovirus plays a role in ME/CFS by comparing two detection methods. The finding that PCR detects enteroviral sequences more frequently in CFS patients than controls provides some evidence linking enteroviruses to the condition, which could eventually lead to better diagnostic or treatment approaches.
Observed Findings
- 42% of CFS patients tested PCR-positive for enteroviral sequences compared to 9% of healthy controls
- 34% of CFS patients were positive for Coxsackie B neutralizing antibodies compared to 41% of healthy controls
- 66% of CFS patient results showed concordance (both positive or both negative) between the two tests
- In discordant CFS cases, 21/34 were PCR-positive but seronegative
- In discordant control cases, 37/42 were PCR-negative but seropositive
Inferred Conclusions
- PCR detection of enteroviral sequences differentiated CFS patients from healthy controls, suggesting enteroviruses may be more frequently present in CFS
- The Coxsackie B neutralization assay could not differentiate between groups and may have limited clinical utility for CFS diagnosis
- The high frequency of PCR-positive/seronegative results in CFS patients may suggest recent or acute enteroviral infection with incomplete antibody response
Remaining Questions
- Does the presence of enteroviral sequences indicate active, persistent, or cleared infection?
- Why do CFS patients show different patterns of PCR and antibody results compared to healthy controls?
What This Study Does Not Prove
This study does not prove that enterovirus causes ME/CFS—it only shows an association between viral sequences and diagnosis. The cross-sectional design cannot establish temporal relationship or causality. The study also does not clarify whether detected viral sequences represent active infection, persistent infection, or contamination.
Tags
Symptom:Fatigue
Biomarker:AutoantibodiesBlood Biomarker
Method Flag:Weak Case DefinitionSmall SampleExploratory Only
Metadata
- DOI
- 10.1002/jmv.1890460404
- PMID
- 7595406
- Review status
- Machine draft
- Evidence level
- Single-study or moderate support from human research
- 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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