• Chronic fatigue syndrome 5 years after giardiasis: differential diagnoses, characteristics and natural course 

      Mørch, Kristine; Hanevik, Kurt; Rivenes, Ann Christin; Bødtker, Jørn; Næss, Halvor; Stubhaug, Bjarte; Wensaas, Knut-Arne; Rørtveit, Guri; Eide, Geir Egil; Hausken, Trygve; Langeland, Nina (Peer reviewed; Journal article, 2013-02-12)
      Background: A high prevalence of chronic fatigue has previously been reported following giardiasis after a large waterborne outbreak in Bergen, Norway in 2004. The aim of this study was to describe and evaluate differential ...
    • Comorbidities treated in primary care in children with chronic fatigue syndrome 

      Bakken, Inger Johanne; Tveito, Kari; Aaberg, Kari Modalsli; Ghaderi, Sara; Gunnes, Nina; Trogstad, Lill; Magnus, Per; Stoltenberg, Camilla; Håberg, Siri Eldevik (Peer reviewed; Journal article, 2016-09-02)
      Background: Chronic fatigue syndrome/myalgic encephalomyelitis (CFS/ME) is a complex condition. Causal factors are not established, although underlying psychological or immunological susceptibility has been proposed. We ...
    • Giardia-specific cellular immune responses in post-giardiasis chronic fatigue syndrome 

      Hanevik, Kurt; Kristoffersen, Einar; Mørch, Kristine; Rye, Kristin Paulsen; Sørnes, Steinar; Svärd, Staffan; Bruserud, Øystein; Langeland, Nina (Peer reviewed; Journal article, 2017-01-28)
      Background: The role of pathogen specific cellular immune responses against the eliciting pathogen in development of post-infectious chronic fatigue syndrome (PI-CFS) is not known and such studies are difficult to perform. ...
    • Immunophenotyping in post-giardiasis functional gastrointestinal disease and chronic fatigue syndrome 

      Hanevik, Kurt; Kristoffersen, Einar K.; Sørnes, Steinar; Mørch, Kristine; Næss, Halvor; Rivenes, Ann Christin; Bødtker, Jørn; Hausken, Trygve; Langeland, Nina (Peer reviewed; Journal article, 2012-10-14)
      Background: A Giardia outbreak was associated with development of post-infectious functional gastrointestinal disorders (PI-FGID) and chronic fatigue syndrome (PI-CFS). Markers of immune dysfunction have given conflicting ...
    • Kronisk utmattelsessyndrom. Kunnskap, aktivitet og utfordringer 

      Larun, Lillebeth (Doctoral thesis, 2011-09-29)
      Chronic fatigue syndrome (CFS) is a serious disease, the aetiology of which remains unknown. The disease is manifest in a number of complex symptoms involving the neurological, immunological and endocrine systems. The ...
    • Prevalence and predictors of recovery from chronic fatigue syndrome in a routine clinical practice 

      Flo, Elisabeth; Chalder, Trudie (Peer reviewed; Journal article, 2014-08-26)
      Cognitive behavioural therapy (CBT) is one of the treatments of choice for patients with chronic fatigue syndrome (CFS). However, the factors that predict recovery are unknown. The objective of this study was to ascertain ...
    • Two age peaks in the incidence of chronic fatigue syndrome/myalgic encephalomyelitis: a population-based registry study from Norway 2008-2012 

      Bakken, Inger Johanne; Tveito, Kari; Gunnes, Nina; Ghaderi, Sara; Stoltenberg, Camilla; Trogstad, Lill; Håberg, Siri Eldevik; Magnus, Per (Peer reviewed; Journal article, 2014-10-01)
      Background: The aim of the current study was to estimate sex- and age-specific incidence rates of chronic fatigue syndrome/myalgic encephalomyelitis (CFS/ME) using population-based registry data. CFS/ME is a debilitating ...