[Asthenia or anaemia. What is the diagnosis?].

Giardiasis is one of the most frequent parasitic infections in the world that must be considered in every patient with persistent diarrhoea or digestive tract and/or malabsorption symptoms after a foreign trip or in the immigrant population, although its presentation is not always the typical. A 25 year old woman from Equatorial Guinea was seen at the clinic due to several months of asthenia. The Laboratory analyses showed normocytic and normochromic anaemia and high erythrocyte sedimentation rate (ESR). Throughout the presentation of the case report the differential diagnoses of asthenia, normocytic and normochromic anemia and high ESR will be discussed until the final diagnosis of giardiasis was made.