Multiple origins of European populations of the giant liver fluke Fascioloides magna (Trematoda: Fasciolidae), a liver parasite of ruminants

► European populations of Fascioloides magna have multiple origins. ► Fascioloides magna from Italy is genetically distinct from all other European populations. ► Italian F. magna is of western North American origin. ► Czech and Danube populations are genetically identical. ► Fascioloides magna was introduced to the Czech focus from south-eastern regions of the USA.