Morris, Gerwyn, Berk, Michael, Walder, Ken et al. · Molecular neurobiology · 2016 · DOI
This paper reviews how viruses (like EBV and cytomegalovirus), bacteria (like those causing Lyme disease), and mold exposure might cause ME/CFS in some patients. The authors explain that standard treatments like counseling and exercise have limited success, and suggest that doctors should look more carefully for hidden infections or past mold exposure when standard blood tests don't find an obvious cause.
This paper challenges the dismissal of ME/CFS as purely psychosomatic by proposing concrete infectious and environmental mechanisms that could explain severe fatigue and disability. For patients, it validates the search for underlying biological causes; for researchers, it outlines a framework for investigating persistent pathogens that may evade standard detection methods.
This is a review article, not a clinical trial or cohort study, so it does not present new primary data proving that any pathogen or toxin causes ME/CFS in a specific population. The paper does not establish causation, prevalence, or which subsets of ME/CFS patients (if any) have detectable persistent infections. It also does not provide evidence that treating these putative infections improves ME/CFS outcomes.
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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Primary citation
Morris, Gerwyn, Berk, Michael, Walder, Ken, & Maes, Michael (2016). The Putative Role of Viruses, Bacteria, and Chronic Fungal Biotoxin Exposure in the Genesis of Intractable Fatigue Accompanied by Cognitive and Physical Disability.. Molecular neurobiology. https://doi.org/10.1007/s12035-015-9262-7
BibTeX
@article{mecfsatlas-morris-2016-putative-role,
author = {Morris, Gerwyn and Berk, Michael and Walder, Ken and Maes, Michael},
title = {The Putative Role of Viruses, Bacteria, and Chronic Fungal Biotoxin Exposure in the Genesis of Intractable Fatigue Accompanied by Cognitive and Physical Disability.},
journal = {Molecular neurobiology},
year = {2016},
doi = {10.1007/s12035-015-9262-7},
note = {PubMed: 26081141},
url = {https://www.mecfsatlas.com/evidence/morris-2016-putative-role},
}Atlas snapshot reference
ME/CFS Atlas. Generator v1 / Scanner v1.4 / policy v0.1. Accessed 2026-05-28. https://www.mecfsatlas.com/evidence/morris-2016-putative-role
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