Abstract
A survey was conducted on 30 Danish mink farms from April to October 2016 to determine the prevalence and species of Eimeria in Danish farmed mink. In total, 2.6% of mink faecal samples (108/4140) were positive for Eimeria vison-like oocysts by microscopy, with 24.8% (78/315) of mink being positive at least once during the study period. Morphological analysis of sporulated oocysts (n = 20) identified Eimeria vison-like oocysts measuring 21.0 × 13.8 μm with a length/width (L/W) ratio of 1.5. Phylogenetic analysis of 18S rRNA sequences (1221 bp) from three positive mink indicated that Eimeria vison-like shared the highest genetic similarity to Eimeria sp. ex Apodemus agrarius from a Striped field mouse (A. agrarius) from the Czech Republic (99.6%). Analysis of a shorter region of 18S (531 bp) revealed that the E. vison-like genotype sequences grouped in the same clade and shared 97.7% similarity with E. furonis. At the cytochrome c oxidase subunit I (COI) locus, mink-derived sequences were not available from GenBank and phylogenetic analysis placed the novel E. vison-like in a clade with E. cf. ictidea (99.4% similarity) from a black footed ferret (Mustela nigripes) from Canada.
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Acknowledgements
We thank the participating mink farmers for their support and providing faecal samples throughout the study. The authors also thank Boi Tien Thi Pharm and Aleksandra Tofteby for their skilled technical assistance with analysing the faecal samples.
Funding
This project was funded by the Pelsdyrafgiftsfonden 2016 (www.pelsdyrafgiftsfonden.dk/media/167031/vedt_gter_20-04-12.pdf). Pelsdyrafgiftsfonden is a levy fund, according to law order no. 445, 23 April 2010. The objective of the fund is to support research, with the aim to enable a more sustainable fur production. The fund did not interfere in the study design, data collection, data analysis or the interpretation of the results.
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Petersen, H.H., Yang, R., Chriél, M. et al. Morphological and molecular characterisation of Eimeria vison-like oocysts (Apicomplexa:Eimeriidae) in farmed mink (Neovison vison) in Denmark. Parasitol Res 117, 2933–2939 (2018). https://doi.org/10.1007/s00436-018-5989-1
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DOI: https://doi.org/10.1007/s00436-018-5989-1