A study of nearly 3,000 Latin Americans who attended the Hospital Clínic in Barcelona over 17 years showed that 47% were infected by the parasite that causes Chagas disease. Of these, 17% also presented cardiac alterations derived from the disease. The study reveals that there is under-diagnosis in Spain, as there is in endemic areas. However, due to the characteristics of the research, the authors point out that "these data cannot be used to estimate the prevalence of infection in the general Latin American population living in Spain", which is notably lower according to other studies. The results are published in the journal PLoS Neglected Tropical Diseases.