貉原产于亚洲，是欧洲的外来入侵物种，自 2019 年起被列入欧盟关注的外来入侵物种名录。貉被认为对本地生物多样性具有负面影响，并且在寄生和传播对人类和兽医具有重要意义的多种寄生虫和病原体方面发挥着至关重要的作用。在本研究中，对 73 只德国貉进行了胃内容物分析和寄生虫学检查。此外，还分析了粪便样本。研究结果证实了这样的假设，即被检查的貉感染了各种体外和体内寄生虫动物群。总共检测到 9 种体外寄生虫和 11 种体内寄生虫，其中 6 种体内寄生虫具有人类致病潜力。 Trichodectes canis (P = 53.42%)、 Toxocara canis (P = 50.68%) 和Uncinaria stenocephala (P = 68.49%) 是最丰富的寄生虫种类。胃内容物由大约三分之一的植物成分和三分之二的动物成分组成，包括各种两栖动物、鱼类、昆虫、哺乳动物和鸟类。其中包括特别保护或濒临灭绝的物种，如草蛙林蛙（Rana temporaria） 。研究表明，貉由于其杂食性，对本地物种产生捕食压力，并且作为多种寄生虫的携带者，对野生、家养和农场动物以及人类构成潜在的感染风险。
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The hidden threat: Exploring the parasite burden and feeding habits of invasive raccoon dogs (Nyctereutes procyonoides) in central Europe
Originally from Asia, the raccoon dog Nyctereutes procyonoides is an invasive alien species in Europe, listed since 2019 on the List of invasive alien species of Union concern. The raccoon dog is considered to have negative impact on native biodiversity, as well as a crucial role in hosting and transmitting diverse parasites and pathogens of human and veterinary importance. In the present study, stomach content analyses and parasitological examinations were performed on 73 raccoon dogs from Germany. In addition, fecal samples were analyzed. The results of the study confirm the assumption that the examined raccoon dogs were infested with a various ecto- and endoparasite fauna. A total of 9 ecto- and 11 endoparasites were detected, with 6 of the endoparasites having human pathogenic potential. Trichodectes canis (P = 53.42%), Toxocara canis (P = 50.68%) and Uncinaria stenocephala (P = 68.49%) were the most abundant parasite species. The stomach contents consisted of approximately one-third vegetable and two-thirds animal components, composed of various species of amphibians, fish, insects, mammals and birds. Among them were specially protected or endangered species such as the grass frog Rana temporaria. The study shows that the raccoon dog exerts predation pressure on native species due to its omnivorous diet and, as a carrier of various parasites, poses a potential risk of infection to wild, domestic and farm animals and humans.