A non-encapsulated species within its genus has been identified as the first to infect mammals and birds, with the first detection in a wolf from Central Italy in October 2020.
This species was previously found in various animals in Italy, including a red fox, three bird species, and five wild boars, and is linked to a human outbreak of trichinellosis in 2015.
The rarity of this nematode in carnivorous mammals compared to its encapsulated counterparts raises questions about the role of these carnivores as potential reservoirs for the parasite.