title: [Management of prolonged fever of unknown origin].
abstract: Problems arisen with long lasting fevers of undetermined origin are frequently hard to resolve. Infectious diseases are the right diagnosis in less than 50% of patients, especially for very long lasting fevers and in the elderly. Complex investigation must start after the 15th day of evolution, and must proceed in a definite way. Laparotomy may be the last resort of investigation. Antibiotherapy is to be delayed as long as possible, but in several cases cannot be avoided, the choice of drugs being sometimes difficult.
mesh_terms: D005335:Fever of Unknown Origin / Q000209:etiology / Q000628:therapy; D006760:Hospitalization; D006801:Humans; D013997:Time Factors
vernacular_title: Conduite à tenir en présence d'une fièvre prolongée d'étiologie obscure.