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Trans R Soc Trop Med Hyg. 2009 May;103(5):530-2. doi: 10.1016/j.trstmh.2009.01.010. Epub 2009 Jan 30.

High rate of fatigue and abdominal symptoms 2 years after an outbreak of giardiasis.

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National Centre for Tropical Infectious Diseases, Haukeland University Hospital, 5021 Bergen, Norway.


The aim of this study was to evaluate the prevalence of fatigue and abdominal symptoms 2 years after Giardia lamblia infection. All 1262 cases who had Giardia-positive stool samples during an outbreak in 2004 in Norway received a questionnaire in 2006 asking about fatigue and abdominal symptoms. Fatigue was reported by 41%, whereas 38% reported abdominal symptoms, and there was a highly significant association between these symptoms. Increasing age was a highly significant risk factor for fatigue. The symptoms were not due to chronic infection in this cohort. Our data warrant further investigations into the late effects of giardiasis.

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