Giardia Induced Fatigue and Functional Gastrointestinal Diseases

A giardiasis outbreak in Bergen has given us the opportunity to approach two basic research questions of national and global importance: * Studying the pathoimmunology of giardiasis in a natural setting, and following the genetic and immunological responses leading to recovery or persistent disease and sequelae. * Studying the two disease entities FGID and CFS when induced by acute giardiasi and their risk factors. * Interventional cognitive behavioural therapy is the only intervention documented to have significant effect on CFS outcome, and conventional cognitive behavioural therapy will be compared to a psycho-educational programme in the format of a randomised controlled trial.