Alveolar echinococcosis (AE) is considered the most dangerous parasitic zoonosis in Central Europe and is caused by the second larval stage of the small fox tapeworm Echinococcus multilocularis. In addition to humans, non-human primates can also contract AE, which is characterized by a gradually progressive course of the disease and is usually fatal if left untreated. Due to the increase in spontaneous cases of AE in macaques at the German Primate Center, the changes associated with AE were extensively pathomorphologically...