[Parasitic infections: when to think about it?].

When patients return from the Tropics, parasitic infections are immediately being considered when they present with digestive symptoms. Using three examples, we describe parasitic infections acquired in Switzerland simulating other more common community pathologies, which in each case resulted in delayed diagnosis. Awareness among primary care physicians of these rare diseases, whose treatment may be unfamiliar, should improve the care of patients and avoid such late presentations.