The author suggests that increased susceptibility to infection drives the increased number of respiratory infections found in ME/CFS relative to healthy controls. It was a follow up to a 2008 study coming out of England (using the Oxford Definition) which found that stress and fatigue tended to precede the appearance of a respiratory infection. The authors suggested that stress induced immune suppression was responsible but also allowed that maybe the patients didn't actually have infections - just the symptoms of infections.
This study found - whoa - they actually did have infections...
This study found - whoa - they actually did have infections...
Chronic fatigue syndrome and increased susceptibility to upper respiratory tract infections and illnesses. Andrew P. Smitha* & Marie A. Thomasb
Background: Previous research has suggested that chronic fatigue syndrome (CFS) patients report more upper respiratory tract illnesses (URTIs) than controls. Aims: The present study aimed to replicate and extend this research. Method: A prospective study of the incidence of URTIs was conducted. This was similar to previous work involving diary studies but also included objective measures of illness severity (e.g. nasal secretion; sub-lingual temperature) and infection (virus isolation from nasal swabs and antibody changes). Fifty-seven patients with CFS, diagnosed according to the 1994 CDC criteria, were recruited randomly from a volunteer panel compiled of patients who had attended the Cardiff CFS outpatient clinic. A further 57 individuals without CFS were recruited from a general population research panel.
Results: The results confirmed that CFS patients report more upper respiratory virus infections and the virological results showed that this was not due to a reporting bias but reflected greater susceptibility to infection.
Conclusions: This increased susceptibility to infection in the CFS group can account for the increased reporting of URTIs found in this and previous studies.
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Br J Health Psychol. 2008 Feb;13(Pt 1):177-86. A longitudinal study of the relationship between psychological distress and recurrence of upper respiratory tract infections in chronic fatigue syndrome. Faulkner S1, Smith A.
Abstract
OBJECTIVES:
Previous research has found that chronic fatigue syndrome (CFS) patients report increased susceptibility to upper respiratory tract illnesses (URTIs) when compared with healthy volunteers. This study aimed to replicate and extend this research by investigating the role of psychological distress (stress and negative mood) in the recurrence of URTIs in CFS patients as well as its role in the recurrence of CFS symptoms.
DESIGN:
A 15-week diary study.
METHODS:
Measures of psychological stress, negative mood, recurrence of URTIs and symptoms were recorded each week for a 15-week period. CFS patients (N=21), who had been assessed and diagnosed according to the Oxford criteria, were recruited from the Cardiff Chronic Fatigue Clinic and compared with a matched group of healthy controls (N=18). Frequency of occurrence of infectious illness and the relationship between psychological stress/negative mood and occurrence of illness were assessed.
RESULTS:
CFS patients reported more URTIs than the controls. Stress scores (and negative mood) were significantly higher in the week prior to the occurrence of URTIs than in weeks when no subsequent illness occurred. High levels of psychological stress also preceded the severity of reported symptoms of fatigue in the CFS group.
CONCLUSIONS:
CFS patients reported more frequent URTIs than healthy controls and these recurrences were preceded by high levels of psychological stress. High levels of stress were also associated with greater subsequent fatigue. Possible explanations of these results are discussed.