Strauss, Bernhard, Löschau, Maria, Seidel, Thomas et al. · Journal of psychosomatic research · 2012 · DOI
This study looked at fatigue in people who had been infected with Q fever (a bacterial infection) compared to people who hadn't had it. Researchers found that Q fever survivors reported much more fatigue than the control group, but very few met the strict criteria for chronic fatigue syndrome (CFS). People with Q fever who had fatigue also reported more health worries, physical symptoms, and emotional stress than those without fatigue.
This study illustrates how post-infectious fatigue syndromes can develop following specific pathogenic exposures and examines the interplay between physical infection and psychological factors. Understanding these mechanisms in Q fever helps contextualize similar patterns in ME/CFS, where establishing post-infectious etiology and identifying contributing psychosocial factors remains clinically important.
This study does not prove that psychological factors cause fatigue in Q fever or ME/CFS—the cross-sectional design cannot establish temporal relationships or causation. The low CFS prevalence in this sample contradicts findings from other post-Q fever studies, limiting generalizability. The presence of psychological symptoms alongside fatigue does not indicate the fatigue is psychogenic or primary.
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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