Spirocerca vulpis is a parasitic nematode of red foxes associated with gastric nodule formation. Since its description in 2018, this species has been reported in red foxes from Spain, Bosnia and Herzegovina, Italy, and Portugal. We present here the analysis of uncharacterized nematodes obtained from gastric nodules of a red fox from Switzerland in 1999. The specimens were identified as S. vulpis based on the observation of teeth-like structures in the buccal capsule and a 99.4% sequence identity to S. vulpis DNA from Spain. Phylogenetic analysis demonstrated the clustering of the Swiss sequences in a different group from specimens of other geographical locations. Altogether, this study constitutes the first report of S. vulpis in Switzerland and a report of the oldest specimen of this species in the world. Our findings highlight the widespread distribution of S. vulpis in Europe which may be facilitated by the free-roaming nature of red foxes.

Spirocerca vulpis是与胃结节形成相关的红狐的寄生线虫。自2018年对其进行描述以来，已在西班牙，波斯尼亚和黑塞哥维那，意大利和葡萄牙的赤狐中报告了该物种。我们在这里介绍了1999年从瑞士的一只红狐的胃结节中获得的未鉴定线虫的分析。根据观察到的颊囊中的齿状结构和与S的99.4％的序列同一性，标本被鉴定为S. vulpis。来自西班牙的vulpis DNA。系统发育分析表明，Swiss序列在与其他地理位置的标本不同的组中成簇。总而言之，这项研究构成了S. vulpis的首次报道。在瑞士，并报告了该物种在世界上最古老的标本。我们的研究结果强调的广泛分布S. vulpis在欧洲可以通过红狐狸自由漫游的性质来促进。