Search and filter 6,171 studies by evidence level, diagnostic criteria, PEM status, and research domain. Each entry links to the original source.
Studies sorted by evidence level, then year. Browse by topic instead →
Evidence level (E0–E3) reflects study type and replication, not methodological quality. A weak systematic review still sits at E0. How evidence levels work →
2041–2060 of 2,422 studies
Komaroff, A L·JAMA·1997
This case study describes one patient's experience with ME/CFS, detailing her symptoms, medical history, and clinical presentation. The study provides an in-depth look at how ME/CFS affects a real person and what doctors observed during evaluation. This type of detailed patient story can help both patients and doctors better understand the condition.
Fohlman, J, Friman, G, Tuvemo, T·Lakartidningen·1997
Enteroviruses are common viruses that usually cause mild illnesses like colds, but researchers have discovered that in some cases, these viruses may persist in the body long after the initial infection. This review suggests that chronic or recurring enteroviral infections might contribute to several unexplained diseases, including chronic fatigue syndrome, by either persisting in the body or triggering abnormal immune responses.
Allain, T J, Bearn, J A, Coskeran, P et al.·Biological psychiatry·1997
This study looked at hormone levels in people with ME/CFS compared to healthy controls. Researchers found that ME/CFS patients had lower levels of two growth-related hormones (IGF-I and IGF-II), a weaker response to a hormone stimulation test, higher insulin levels, and lower levels of a protein that regulates these hormones. These differences suggest the hormone system that controls growth and metabolism may work differently in ME/CFS.
Dinan, T G, Majeed, T, Lavelle, E et al.·Psychoneuroendocrinology·1997
This study tested whether a specific brain chemical system called serotonin works properly in ME/CFS patients. Researchers gave patients and healthy people a medication that activates serotonin receptors, then measured how the body's stress-response system (the HPA axis) reacted. They found that ME/CFS patients had a weaker response than healthy people, suggesting this brain system doesn't function normally in ME/CFS.
Ziem, G, McTamney, J·Environmental health perspectives·1997
This study looked at people who react strongly to everyday chemicals—like cleaning products, pesticides, and new materials—at levels that don't bother most people. Researchers gave these patients questionnaires and ran medical tests to understand their symptoms. They found that chemical sensitivity often overlaps with ME/CFS and fibromyalgia, and that several body systems (liver, nervous system, immune system) appear to be affected in these patients.
Mounstephen, A, Sharpe, M·Occupational medicine (Oxford, England)·1997
This article reviews what doctors who work in occupational health need to know about ME/CFS to help their patients. The authors discuss what ME/CFS is, what might cause it, how patients typically recover, and practical ways to diagnose and manage the condition. They argue that occupational health doctors are in a good position to help improve outcomes for people with ME/CFS, particularly by improving education, rehabilitation programs, and support for staying in or returning to work.
Martin, W J·Pathobiology : journal of immunopathology, molecular and cellular biology·1997
Researchers found a virus in the spinal fluid of a nurse with chronic fatigue syndrome. Using a genetic detection method called RT-PCR, they identified RNA sequences matching a virus previously found in monkey cells. This suggests that certain viruses associated with ME/CFS may exist in a replicating form that could be targeted by treatments.
van der Meer, J W, Rijken, P M, Bleijenberg, G et al.·Nederlands tijdschrift voor geneeskunde·1997
This guideline, developed by Dutch doctors and health officials, suggests that chronic fatigue lasting more than 6 months without a clear medical cause should be managed differently depending on how long someone has had it. Rather than continuously searching for hidden causes, patients are encouraged to gradually rebuild activity using a structured schedule and focus on overall health promotion.
Jacobson, S K, Daly, J S, Thorne, G M et al.·Clinical infectious diseases : an official publication of the Infectious Diseases Society of America·1997
This case study describes a young woman whose severe fatigue, fever, and other symptoms resembled ME/CFS, but were traced to a persistent parvovirus B19 infection. Doctors detected the virus in her blood using sensitive testing methods, even though her body had produced antibodies against it. When she received intravenous immunoglobulin treatment, her fever improved.
Plioplys, A V·Neurology·1997
Researchers investigated whether people with ME/CFS have antibodies (immune proteins) in their blood that attack muscles or the brain, which could explain fatigue and brain fog symptoms. They compared 10 ME/CFS patients with 10 healthy controls but did not find evidence of these harmful antibodies in either group.
Gupta, S, Aggarwal, S, See, D et al.·Journal of psychiatric research·1997
Researchers tested immune cells from people with ME/CFS to measure inflammation-related proteins called cytokines. They found that certain immune cells from ME/CFS patients produced higher levels of inflammatory proteins (TNF-alpha and IL-6) without any stimulation, but produced lower levels of a protective protein (IL-10) compared to healthy people. These imbalances might explain some of the symptoms people with ME/CFS experience.
Jason, L A, Tryon, W W, Frankenberry, E et al.·Psychological reports·1997
This study looked at whether questionnaires people fill out about their fatigue match what activity monitors show about how much they actually move. Researchers tracked one patient with ME/CFS using both self-report scales and an actigraphy device. They found that activity levels were connected to things that predict fatigue, but were not directly related to how fatigued the person felt.
Pourmand, R·Disease-a-month : DM·1997
This article discusses myasthenia gravis, a different disease from ME/CFS in which the immune system attacks the connection between nerves and muscles, causing weakness and fatigue that worsen with activity. The authors explain how doctors diagnose this condition and review improved treatments that have made it less serious than it used to be. While myasthenia gravis can sometimes look like ME/CFS or depression, it is a distinct autoimmune disorder with specific antibodies in the blood.
Holland, P·The Journal of analytical psychology·1997
This study describes how one woman with ME/CFS improved over three years of talk therapy that focused on her emotions and relationships. The therapy helped her recognize patterns from her past—particularly how she swung between wanting closeness and withdrawing into isolation—which seemed connected to her physical exhaustion. As she worked through these patterns and built better relationships, including becoming pregnant, her fatigue improved.
Dröge, W, Holm, E·FASEB journal : official publication of the Federation of American Societies for Experimental Biology·1997
This study proposes that several diseases—including ME/CFS, HIV, cancer, and inflammatory bowel disease—share a common pattern: low levels of certain amino acids (cysteine and glutamine), weakened immune cells called natural killer cells, and muscle weakness. The researchers suggest these low amino acid levels may be both a cause and a consequence of muscle wasting, and that boosting cysteine might help treatment when combined with disease-specific therapies.
Dickinson, C J·European journal of clinical investigation·1997
This review examines why ME/CFS develops, looking at evidence from 40 years of research. The author discusses how ME/CFS may involve damage to the brain stem (the oldest part of the brain that controls basic functions like sleep and alertness), possibly from a previous viral infection. Brain imaging studies have found small patches of damage in the brain stems of some ME/CFS patients, similar to what is seen in other conditions like post-polio fatigue.
Redmond, G·International journal of fertility and women's medicine·1997
This paper discusses why women often experience mood changes and fatigue, and how doctors can help. The authors suggest that these symptoms are often related to depression rather than hormonal problems alone, and that SSRIs (a common type of antidepressant) can be helpful for many women. They also emphasize the importance of listening to patients about stress and life challenges.
Plioplys, A V, Plioplys, S, Davis, J S·Hospital practice (1995)·1997
This article discusses the challenges that ME/CFS patients face, including long-lasting disability and doctors who may not understand or believe in the condition. The authors explain that while there are no blood tests that definitively prove ME/CFS, doctors can confidently diagnose it using established criteria and ruling out other diseases. They suggest that medications can help manage symptoms while patients work toward recovery.
Galbraith, D N, Nairn, C, Clements, G B·The Journal of general virology·1997
Researchers tested blood samples from 8 people with ME/CFS and found traces of enterovirus (a type of virus) in samples taken at least 5 months apart. In 4 of these individuals, the virus appeared to be the same virus persisting in their body over time, rather than a new infection. This suggests that some people with ME/CFS may have viruses that linger in their system rather than being cleared completely.
See, D M, Broumand, N, Sahl, L et al.·Immunopharmacology·1997
This study tested whether two herbal supplements—echinacea and ginseng—could boost immune cells taken from healthy people and patients with ME/CFS or HIV/AIDS. Researchers found that both herbs increased the activity of natural killer cells and antibody-dependent immune responses in blood samples from all three groups. While the results suggest these herbs may help activate certain immune functions, this was a laboratory experiment using cells in a dish, not a study of people taking the supplements.
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Thematic groupings by clinical question or research area.
PET imaging and other studies providing evidence for brain inflammation in ME/CFS.
NeurologyMetabolomics and mitochondrial function studies revealing energy metabolism disruption.
MetabolismStudies identifying potential biological markers for ME/CFS diagnosis and stratification.
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