Management of chronic (post-viral) fatigue syndrome.

Simple rehabilitative strategies are proposed to help patients with the chronic fatigue syndrome. A model is outlined of an acute illness giving way to a chronic fatigue state in which symptoms are perpetuated by a cycle of inactivity, deterioration in exercise tolerance and further symptoms. This is compounded by the depressive illness that is often part of the syndrome. The result is a self-perpetuating cycle of exercise avoidance. Effective treatment depends upon an understanding of the interaction between physical and psychological factors. Cognitive behavioural therapy is suggested. Cognitive therapy helps the patient understand how genuine symptoms arise from the frequent combination of physical inactivity and depression, rather than continuing infection, while a behavioural approach enables the treatment of avoidance behaviour and a gradual return to normal physical activity.     

Illness behaviors in patients with unexplained chronic fatigue are associated with significant other responses

Chronic fatigue syndrome (CFS) and unexplained chronic fatigue (CF) are characterized by compromised functional status and physical disability. Prior research on chronic pain has suggested that social factors may contribute to disability. This study examined the relationship between significant other responses and patient outcomes in patients with unexplained CF. Questionnaire data were collected from 117 patients on physical function, fatigue, pain, illness behaviors and responses of significant others to them, and depression. Ninety-four SOs reported their perceptions of patient illness behavior and their responses. Thirty-seven of these dyads also completed a series of household activities while being videotaped. Dyadic interactions were coded and analyzed. Both reported and observed solicitous responses by the significant other were associated with reported and observed patient illness behavior. Negative responses to patient illness behavior by significant others were associated with higher levels of patient depressive symptoms. The findings provide support for the role of operant behavioral factors in the context of chronic fatigue. They also suggest that further research on the relationship between dysfunction and significant other responses in patients with CFS or CF appears warranted and may have implications for treatment development.     

Prevalence of depression in menopause: a pilot study

Summary Objective: The objective of this study was to determine whether women in peri-menopause are more likely to have a major mood disorder than those in pre- or postmenopause. Methods: We studied 100 women between the ages of 45 and 65 years old who were seen at four different women's health centers. Using menstrual and when available, laboratory criteria, each subject was determined to be pre-, peri- or postmenopausal. Each subject completed a Beck Depression Inventory (BDI) and provided psychiatric and medical history in a telephone interview. All patients with a BDI score greater than or equal to 10 were invited to have a psychiatric assessment, including a Structured Clinical Interview for DSM-IV Diagnoses (SCID-DSM IV). Results: The women in the perimenopausal group (n = 38) had statistically significant higher BDI scores than those women in the pre-menopausal (n = 17) and postmenopausal (n = 45) groups (p < 0.0001). Of those in the perimenopausal group who scored ≥ 10 and completed the SCID and met criteria for any psychiatric diagnosis, 11 out of 22 met criteria for Major Depressive Disorder, Recurrent. Conclusions: These data suggest that perimenopause may be a associated with recurrence of pre-existing depressive illness. The findings underscore the clinical importance of screening for and treating major depressive illness in women during the menopausal years.     

TEMPS-a scale in 'mixed' and 'pure' manic episodes: new data and methodological considerations on the relevance of joint anxious-depressive temperament traits

BACKGROUND: Temperament is an important factor in affective illness. There is some indication that mixed episodes result from an admixture of inverse temperamental factors (e.g. depressive and/or anxious) to a manic syndrome. To test this hypothesis, which has been first formulated by Akiskal [Clin. Neuropharmacol. 15 (Suppl. 1A) (1992) 632-633], we compared the temperament of non-acute bipolar affective patients with and without the history of a previous mixed episode. METHODS: Patients who had been hospitalized for a bipolar disorder were re-assessed at least 6 months after their last in-patient treatment. Those who met the criteria for a partially remitted or full affective or psychotic episode at re-assessment were excluded from the study. Data concerning illness history, current psychopathology (SCID-I interview), depression (BDI), mania (Self-Report Manic Inventory) and temperament (TEMPS-A scale) were obtained. Patients with and without a history of previous mixed episodes were compared. RESULTS: Of 49 eligible former patients, 22 subjects with and 23 subjects without a former mixed episode in bipolar affective disorder fulfilled the inclusion criteria. Subjects suffering from bipolar affective disorder exhibited significantly more depressive and anxious and less hyperthymic temperament, if they had experienced a mixed episode previously. Concerning cyclothymic and irritable temperament, bipolar affective patients with a former mixed episode presented non-significantly higher scores. Patients with a former mixed episode presented with higher depression scores than patients without such a history. No group differences were found concerning current mania scores. LIMITATIONS: (1). This is a preliminary report from an ongoing study. (2). Temperament had not been assessed premorbidly. (3). Although group comparisons revealed significant differences, these did not seem great enough to fully explain the emergence of a mixed episode. CONCLUSION: Our findings support the study's hypothesis that mixed episodes occur more often in subjects with an inverse temperament (e.g. depressive and anxious), although it cannot be ruled out that subsyndromal features of the bipolar illness had an effect on temperament assessment.     

Distinguishing patients with chronic fatigue from those with chronic fatigue syndrome: a diagnostic study in UK primary care.

BACKGROUND: Chronic fatigue syndrome (CFS) has been defined, but many more patients consult in primary care with chronic fatigue that does not meet the criteria for CFS. General practitioners (GPs) do not generally use the CFS diagnosis, and have some doubt about the validity of CFS as an illness. AIM: To describe the proportion of patients consulting their GP for fatigue that met the criteria for CFS, and to describe the social, psychological, and physical differences between patients with CFS and those with non-CFS chronic fatigue in primary care. DESIGN OF STUDY: Baseline data from a trial of complex interventions for fatigue in primary care. SETTING: Twenty-two general practices located in London and the South Thames region of the United Kingdom recruited patients to the study between 1999 and 2001. METHOD: One hundred and forty-one patients who presented to their GP with unexplained fatigue lasting six months or more as a main symptom were recruited, and the Centers for Disease Control (CDC) case definition was applied to classify CFS. RESULTS: Approximately two-thirds (69%) of patients had chronic fatigue and not CFS. The duration of fatigue (32 months) and perceived control over fatigue were similar between groups; however, fatigue, functioning, associated symptoms, and psychological distress were more severe in the patients in the CFS group, who also consulted their GP significantly more frequently, were twice as likely to be depressed, and more than twice as likely to be unemployed. About half (CFS = 50%; chronic fatigue = 55%) in each group attributed their fatigue to mainly psychological causes. CONCLUSIONS: In primary care, CFS is a more severe illness than chronic fatigue, but non-CFS chronic fatigue is associated with significant fatigue and is reported at least twice as often. That half of patients, irrespective of CFS status, attribute their fatigue to psychological causes, more than is observed in secondary care, indicates an openness to the psychological therapies provided in that setting. More evidence on the natural history of chronic fatigue and CFS in primary care is required, as are trials of complex interventions. The results may help determine the usefulness of differentiating between chronic fatigue and CFS.     

Familial association between allergic disorders and depression in adult Finnish twins

Clinical studies have shown a relationship between allergic disorders and depression, panic disorder, attention deficit/hyperactivity disorder, and social anxiety for a significant subset of patients with these disorders. The nature of the relationship, whether due to shared environmental or biologic vulnerabilities or as a result of the stress of chronic illness, has been less clear. By examining the covariance of atopic disorders and depressive symptoms in a community sample of monozygotic (MZ) and dizygotic (DZ) twins, the contribution of genetic and/or shared environmental etiological factors can be established. A Finnish sample of 1337 MZ and 2506 DZ twin pairs, ages 33-60 years, was sent questionnaires inquiring about history of asthma, eczema, and atopic rhinitis, as well as the Beck Depression Inventory (BDI). The nature of the covariation between twins of these symptoms was investigated by fitting competing genetic and environmental models. Within-person correlation between atopic symptoms and BDI was 0.103 (P < 0.001) for the total sample. Using the Mx statistical modeling program to fit the data to competing quantitative genetic models, the best fitting model estimated that 64% of the association between atopy and BDI was due to shared familial vulnerability, primarily additive genetic influences. Although the measures for allergic disorders and depression are crude, this study supports the hypothesis that there is a small shared genetic risk for atopic and depressive symptoms, and if replicated, may open research for common mechanisms between allergic and depressive disorders. Am. J. Med. Genet. (Neuropsychiatr. Genet.) 96:146-153, 2000.     

Treatment response for acute depression is not associated with number of previous episodes: Lack of evidence for a clinical staging model for major depressive disorder

Mental illness has been observed to follow a neuroprogressive course, commencing with prodrome, then onset, recurrence and finally chronic illness. In bipolar disorder and schizophrenia responsiveness to treatment mirrors these stages of illness progression, with greater response to treatment in the earlier stages of illness and greater treatment resistance in chronic late stage illness. Using data from 5627 participants in 15 controlled trials of duloxetine, comparator arm (paroxetine, venlafaxine, escitalopram) or placebo for the treatment of an acute depressive episode, the relationship between treatment response and number of previous depressive episodes was determined. Data was dichotomised for comparisons between participants who had >3 previous episodes (n=1697) or ≤3 previous episodes (n=3930), and additionally for no previous episodes (n=1381) or at least one previous episode (n=4246). Analyses were conducted by study arm for each clinical trial, and results were then pooled. There was no significant difference between treatment response and number of previous depressive episodes. This unexpected finding suggests that treatments to reduce symptoms of depression during acute illness do not lose efficacy for patients with a longer history of illness.     

Assessing Depressive Symptoms in Multiple Sclerosis: Is It Necessary to Omit Items from the Original Beck Depression Inventory?

Overlap between depression scale item content and medical symptoms may exaggerate depression estimates for patients with multiple sclerosis (MS). We reconsider Mohr and co-workers' (1997) recommendation to omit Beck Depression Inventory (BDI) items assessing work ability (item 15), fatigue (17), and health concerns (20) for MS patients. Subjects were medical patients with either MS (n = 105) or a medical disorder for which the BDI is empirically supported [diabetes mellitus (DM), n = 71; chronic pain (CP), n = 80], psychiatric patients with depressive disorder (MDD; n = 37), and healthy controls (HC; n = 80). Relative scores for the eight somatic BDI items were analyzed by multivariate analysis of variance with demographic variables and BDI total as covariates. The only significant difference was MS > HC (item 15). On raw scores, MS patients exceeded HCs on items 15 and 21 (sexual disinterest), but this was attributable to the low HC item endorsement. There were no other differences on somatic items or item-total correlations. Scale consistency was good across groups, regardless of item omission. Somatic items were unassociated with major MS parameters. We thus encourage continued application of the full BDI for assessing depressive symptoms in patients with MS.     

Identification of Beck Depression Inventory Items Related to Multiple Sclerosis

The percentage contribution of each item on the Beck Depression Inventory (BDI) to the total BDI score was compared across patients with multiple sclerosis (MS), patients diagnosed with major depressive disorder, and normal college students. We considered an item to be confounded by MS-related symptoms if its percentage contribution to the total BDI score was significantly greater in the MS group than the major depression and control groups. Items measuring work difficulty, fatigue, and concerns about health met this criterion. These items accounted for 34, 17, and 19% of the total BDI score in the MS, major depression, and control groups, respectively. Using the 18-item BDI (BDI-18) which resulted from excluding the 3 confounded items, MS patients found to be were more depressed than controls but less depressed than the major depression group. The identification of signs of depression not confounded with MS which could be substituted for confounded signs was also discussed.     

A review of the predisposing,precipitating and perpetuating factors in Chronic Fatigue Syndrome in children and adolescents

Chronic Fatigue Syndrome (CFS) is a condition characterised by severe mental and physical fatigue coupled with profound disability. The purpose of this review was to investigate psychological, social and physiological factors associated with fatigue and disability in CFS in children and adolescents. The review aimed to gain an overview of the strength of evidence for the relationship between these different factors and CFS in young people. Seventy-nine studies met the inclusion criteria and were included in the review. A narrative synthesis of these studies was conducted. The strongest and most consistent finding was that rates of psychiatric co-morbidity, predominantly anxiety and depressive disorders, were higher in young people with CFS compared to healthy controls or illness control groups. Studies suggested that many children and adolescents with CFS reported that their illness began with an infection and there was some objective and prospective evidence to support this. Preliminary evidence suggested a link between CFS and a family history of CFS, high expectations from both the parent and child, personality traits such as conscientiousness and physical illness attributions. The evidence was limited by methodological problems. Few studies were prospective in nature and future research should address this. Clinical implications of the findings are discussed and a hypothesised model of the factors associated with CFS in children and adolescents is presented.     

Subjective fatigue and subjective sleepiness: two independent consequences of sleep disorders?

The objective of this investigation was to evaluate subjective fatigue versus subjective sleepiness as independent consequences of sleep disorders. Furthermore, we tried to explore how these symptoms relate to alertness, depressive symptoms and illness intrusiveness. In a prospective observational study, 283 sleep-disordered patients referred to a hospital-based sleep laboratory for various indications over a 1-year period were evaluated vis-à-vis fatigue and sleepiness. All patients completed five subjective questionnaires, underwent objective sleep recording and attended a clinical interview with a sleep specialist. The subjective questionnaires included the Epworth Sleepiness Scale, the Fatigue Severity Scale, the Toronto Hospital Alertness Test, the Illness Intrusiveness Rating Scale and the Center for Epidemiologic Studies-Depression Scale. Only 4% of the total sample was referred to the sleep clinic due to a complaint of excessive fatigue compared with 17% for excessive daytime sleepiness. However, during the assessment, 64% of referred patients reported pathological fatigue without overlap of sleepiness and only 4% reported pathological sleepiness without overlap of fatigue. Pearson's correlation analysis indicated a weak association (r=0.18) between subjective fatigue and sleepiness in the total sample. Analysis of variance testing showed strong association between those patients with prominent fatigue and depressive symptoms (P<0.01) and illness intrusiveness (P<0.001). The findings support the notion that subjective fatigue and sleepiness can be independent manifestations of sleep disorders. Furthermore, predominantly fatigued individuals with sleep disorders seem vulnerable to additional negative consequences due to possible interplay between amplified fatigue and psychological distress.     

Comparison of the effects of depressive symptoms and apnea severity on fatigue in patients with obstructive sleep apnea: a replication study

BACKGROUND: Links between fatigue and depressive symptoms in medically ill patients are well-documented; however, few studies controlled for illness severity. Obstructive sleep apnea (OSA) is a common, frequently devastating disease that often includes daytime sleepiness and fatigue. Fatigue is also a hallmark depressive symptom. We previously reported that depressive symptoms explained ten times the variance in fatigue in OSA patients as did OSA severity itself (respiratory disturbance index, oxyhemoglobin saturation). OSA severity explained 4.2% of variance in fatigue while depressive symptoms explained an additional 42.3%. Here, we report a replication of these findings in a new, independent sample. METHODS: 56 untreated OSA patients had their sleep monitored with polysomnography on the UCSD GCRC. Participants completed the Center for Epidemiologic Studies-Depression (CESD), Profile of Mood States (POMS) and Medical Outcomes Studies (MOS) surveys. Data were analyzed using hierarchical linear regression. RESULTS: OSA severity explained 13.4% (p=0.022) of variance in POMS fatigue while CESD scores explained an additional 24.5% (p<0.001). Results were robust to changes in the scales used to measure these constructs. LIMITATIONS: Cross-sectional design precludes determination of direction of causality. Assessment of depressive symptoms and fatigue was based on validated self-report measures. CONCLUSIONS: These results reaffirm that depressive symptoms are dramatically and independently associated with worse fatigue in OSA patients. While the independent contribution of OSA severity varied between studies, depressive symptoms were the strongest predictor of fatigue in both studies. Assessment and treatment of mood symptoms-not just treatment of OSA itself-might reduce fatigue in these patients.     

Childhood physical and sexual abuse and subsequent depressive and anxiety disorders for two American Indian tribes

BACKGROUND: This study examined the relationship of childhood abuse, both physical and sexual, with subsequent lifetime depressive and anxiety disorders--depression or dysthymia, post-traumatic stress disorder (PTSD), and panic or generalized anxiety disorder (GAD)--among American Indians (AIs). METHOD: Three thousand and eighty-four AIs from two tribes--Southwest and Northern Plains--participated in a large-scale, community-based study. Participants were asked about traumatic events and family history, and were administered standard diagnostic measures of depressive/anxiety disorders. RESULTS: Prevalence of childhood physical abuse was approximately 7% for both tribes. The Southwest tribe had higher prevalence of depressive and anxiety disorders, with rates of PTSD being the highest. Childhood physical abuse was significant in bivariate models of depressive/anxiety disorders, and remained so in the multivariate models. CONCLUSIONS: Childhood physical abuse was a significant predictor of all disorder groups for males in both tribes except for panic/GAD for the Northern Plains tribe in multivariate models; females showed a more varied pattern. Childhood sexual abuse did not significantly differ for males and females, and was an independent predictor of PTSD for both tribes, controlling for childhood physical abuse and other factors, and was significant for the other disorder groups only in the Southwest. Additional covariates that increased the odds of depressive/anxiety disorder, were adult physical or sexual victimization, chronic illness, lifetime alcohol or drug disorder, and parental problems with depression, alcohol, or violence. Results provided empirical evidence of childhood and later life risk factors and expanded the population at risk to include males.     

Factors leading to the reporting of ''functional'' somatic symptoms by general practice attenders.

The aim of this study was to examine the prevalence of 'functional' somatic symptoms in general practice and the factors associated with reporting these symptoms. During a one month period, all attenders aged 16 years and over at a general practice near Leeds were screened for functional somatic symptoms using the Bradford somatic inventory. The general practitioner recorded the patients' personal data and diagnostic assessment. Data were analysed from 670 Europid patients who completed the Bradford somatic inventory at their first attendance during the month. Higher mean numbers of functional somatic symptoms were found in patients with psychiatric and functional syndromes than in patients with organic illness or in well patients. The symptom score on the Bradford somatic inventory was significantly related to five factors: current anxious mood, current depressed mood, sex, chronic physical illness in a parent and a history of depressive illness. Using multiple linear regression analysis, all five factors were found to be independent predictors of symptom scores on the Bradford somatic inventory. This study highlights the multifactorial aetiology of functional somatic symptoms reported by general practice attenders.     

Prevalence of chronic fatigue and chronic fatigue syndrome in Korea: community-based primary care study

There have been many epidemiological and clinical researches on chronic fatigue (CF) and chronic fatigue syndrome (CFS) since the 1990s, but such studies have been quite limited in Korea. The aim of this study was to investigate the point prevalence of CF and CFS in patients who visited community-based eight primary care clinics in Korea. The study subjects were 1,648 patients aged 18 yr and over who visited one of eight primary care clinics in Korea between the 7th and 17th of May 2001. The physicians determined the status of the subjects through fatigue-related questionnaires, medical history, physical examination, and laboratory tests. The subjects were categorized into no fatigue, prolonged fatigue, CF and then CF were further classified to medically explained CF (Physical CF and Psychological CF) and medically unexplained CF (CFS and idiopathic chronic fatigue). The point prevalence of CF and CFS were 8.4% (95% CI 7.1-9.7%) and 0.6% (95% CI 0.2-1.0%). Medically explained CF was 80.5% of CF, of which 57.1% had psychological causes. The clinical characteristics of CFS were distinguished from explained CF. CF was common but CFS was rare in community-based primary care settings in Korea.     

Female psychopathologic profile during menopausal transition: a preliminary study

OBJECTIVES: To evaluate the psychopathological profile and the incidence of major depressive disorders in consecutive women attending a Menopause Clinic. METHODS: Women attending outpatient menopause clinic at Filippo del Ponte Hospital in Varese (Italy), referring to the centre from 1 March to 30 April 2005, were invited to fill up a specific questionnaire while waiting for the visit. The questionnaire included demographics and history (e.g. current or past use of antidepressant drugs); symptoms check list (SCL-90-R); Beck depression inventory (BDI). RESULTS: Sixty-four women were enrolled to the study. On the SCL-90-R, "somatic" symptoms cluster was the most frequent. Patients diagnosed as depressed using the Beck depression inventory (BDI) were 18 (28.1%). Thirteen (70%) of currently depressed women presented a positive history of depressive disorders. The analysis of depressed women according to previous depressive disorders revealed higher scores for women with positive history in both scales. Depressed patients have a significantly lower mean age compared to non-depressed patients (53.3+/-6.2 years versus 57.33+/-4.9 years, p=0.023). CONCLUSIONS: Our preliminary data show a high correlation between a history of depressive disorder and recurrence of depression in the menopausal period. Perimenopause seems to be a higher risk period for the development of a depressive disease compared to menopausal status. The somatization cluster warrants further investigation.     

Self-Reported Fatigue and Depressive Symptoms as Main Indicators of the Quality of Life (QOL) of Patients Living with HIV and Hepatitis C: Implications for Clinical Management and Future Research

Abstract

Purpose: To analyze the impact of self-reported fatigue and depressive symptoms on the quality of life (QOL) of patients co-infected with HIV and hepatitis C virus (HCV) not receiving anti-HCV therapy. Method: We used data from a cross-sectional survey conducted among 115 co-infected adults including an assessment of QOL (WHOQOL-HIV bref questionnaire), depressive symptomatology (Center for Epidemiological Studies Depression Scale [CES-D]), and fatigue (Fatigue Impact Scale [FIS]). Results: Eighty-four percent of patients had been infected through injecting drug use (IDU). Half reported a history of depression or other psychiatric co-morbidities, 57% presented depressive symptoms, and 69% reported fatigue. FIS and CES-D scores accounted for 54% and 66% of total variance in psychological QOL and level of independence-related QOL, respectively, in a multivariate analysis adjusted for sociodemographic and clinical characteristics and alcohol or drug use. High FIS scores were independently associated with impaired physical QOL and social relationships, whereas high CES-D scores were independently associated with lower environmental QOL. Conclusion: Self-reported fatigue and depressive symptoms are the best indicators of co-infected patients’ QOL. These two indicators could be more easily used for a better clinical management of co-infected patients and also introduced as patient outcome measures in clinical research.     

Depression among men made involuntarily redundant

Ninety-eight men aged 25-50, who were unemployed because of involuntary redundancy and out of work for 2-18 months, completed the Beck Depression Inventory (BDI) and the General Health Questionnaire (GHQ-30). Their scores were compared with those of a group of employed men matched for age and social class. The mean GHQ score for the redundant men was 13.0, compared with 4.0 for the employed group. The mean BDI score was 11.1 for the redundant group and 5.6 for the employed group. Eighteen per cent of the redundant men, compared with 6% of the employed group, scored 18 or more which are scores corresponding to those in depressive illness. We conclude that the prevalence of depressive illness may be increased among redundant men.     

Dissociative Depression Among Women with Fibromyalgia or Rheumatoid Arthritis

The aim of this study was to inquire about the possible relations of childhood trauma, anger, and dissociation to depression among women with fibromyalgia or rheumatoid arthritis. Fifty female patients diagnosed as having fibromyalgia (n = 30) or rheumatoid arthritis (n = 20) participated in the study. The Childhood Trauma Questionnaire, Somatoform Dissociation Questionnaire (SDQ), Dissociation Questionnaire (DIS-Q), Beck Depression Inventory (BDI), Spielberger State-Trait Anger Expression Inventory, and Dissociative Disorders Interview Schedule were administered to all participants. Women with a lifetime diagnosis of depressive disorder had higher scores for somatoform and psychoform dissociation than the nondepressive patients. However, childhood trauma scores did not differ between the 2 groups. In regression analysis, current severity of depression (BDI) was predicted by psychoform dissociation (DIS-Q) and lower education, and lifetime diagnosis of major depression was predicted by somatoform dissociation (SDQ). Whereas childhood emotional neglect predicted somatoform dissociation, psychoform dissociation was predicted by childhood sexual abuse. Mental processing of anger seems to be 1 of the dimensions of psychodynamics in trauma-related depressive conditions. In the context of the perceived threat of loss of control due to expressed anger and mental disintegration, somatoform dissociation seems to contribute to overmodulation of emotions in dissociative depression. Among patients suffering from physical illness with possible psychosomatic dimensions, assessment of somatoform dissociation in addition to psychoform dissociation may be helpful to understand diverse psychopathological trajectories emerging in the aftermath of childhood adversities. The recently proposed category of “dissociative depression” (Sar, 2011) seems to be a promising concept for future research on psychosomatic aspects of traumatic stress.     

Detection of enterovirus-specific RNA in serum: The relationship to chronic fatigue

The serum of 88 chronic fatigue patients was screened for enteroviral specific sequences by polymerase chain reaction (PCR) assay. The PCR method used was “nested” PCR targetting the 5′ nontranslated region of the enteroviral genome which yielded a final fragment length of 264 base pairs. Samples were obtained from patients during 1990–1991. In addition, buffy coat specimens and stool specimens were examined in some patients. Samples from two cohorts of comparison individuals were also obtained. The comparison groups were firstly, acutely ill individuals with symptoms consistent with a presumed enteroviral infection (matched by age, sex, and date of receipt of specimen) and secondly, healthy individuals (matched by age and date of receipt of specimen). Enteroviral specific sequences were detected in 36 of 88 serum samples from chronic fatigue patients, 22 of 82 acutely ill individuals, and 3 of 126 healthy individuals. The enteroviral PCR positivity did not correlate with any one particular feature of chronic fatigue nor did it reflect any history of illness at onset of fatigue, duration of fatigue, or age of patient. These results provide new evidence for the presence of enteroviral specific sequences in serum, buffy coat, and stool samples in many patients with chronic fatigue. This may reflect a persistent enterovirus infection in a proportion of chronic fatigue patients. © 1995 Wiley-Liss, Inc.