ArticleActa parasitologica2025
Eucoleus aerophilus (syn. Capillaria aerophila) infection in zoo-housed arctic foxes (Vulpes lagopus).
Article in Acta parasitologica, 2025. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 1 paper.
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1 citing paper in PubMed.
- Endoparasites in carnivores in Swiss zoological institutions between 2009 and 2024: evaluation of risk factors and deworming strategies.International journal for parasitology. Parasites and wildlife · 2026Article
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8 authors.
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Abstract
purposeEucoleus aerophilus (syn. Capillaria aerophila) (Nematoda: Capillariidae) is a common endoparasite of free-ranging canids. In zoological gardens, reports on E. aerophilus-infections are scarce. We here present a case series of E. aerophilus infections in zoo-held arctic foxes with the aim to provide assistance for zoo veterinarians for future cases.
methodsA total of five zoo-born and -housed arctic foxes (Vulpes lagopus) were presented with coughing periods and strong phlegm, four of them showing rapid deteriorations at different time points including dyspnoea leading to death. Coproscopical analysis of pooled and individual faecal samples and necropsies were performed.
resultsFaecal analysis showed shedding of typical capillariid eggs, which corroborated the suspicion of respiratory capillariosis. Multiple attempts of deworming using different anthelmintic treatment protocols (fenbendazole; milbemycinoxime and praziquantel; ivermectin; levamisole; selamectin; moxidectin and imidacloprid) did neither result in negative egg shedding periods nor in improvement of clinical symptoms. A regime performed with fenbendazole (100 mg/kg bodyweight per os over 14 days) resulted in cessation of egg shedding. At necropsy of four animals, multifocal chronical granulomatous pneumonia was diagnosed, associated with a massive infection with adult nematodes detected in trachea, bronchi and bronchioles and bacterial infections. Morphological analysis of extracted nematodes identified E. aerophilus, which was confirmed by molecular analysis based on the 18S rRNA gene.
conclusionWe here show clinical and necropsy data and morphological and molecular worm identifications and call for further parasitological research in ex situ populations of arctic foxes to assess the impact of parasites on this species.
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