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Pyziel AM, Laskowski Z, Dolka I, Kołodziej-Sobocińska M, Nowakowska J, Klich D, Bielecki W, Żygowska M, Moazzami M, Anusz K, Höglund J. Large lungworms (Nematoda: Dictyocaulidae) recovered from the European bison may represent a new nematode subspecies. Int J Parasitol Parasites Wildl 2020; 13:213-220. [PMID: 33209582 PMCID: PMC7658659 DOI: 10.1016/j.ijppaw.2020.10.002] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 09/01/2020] [Revised: 10/07/2020] [Accepted: 10/07/2020] [Indexed: 11/26/2022]
Abstract
Although the Dictyocaulus lungworm, the agent of dictyocaulosis, is one of parasitological threats to European bison, its systematic position remains unclear. The aim of the present study was to evaluate the morphological features of the lungworm and the pathological lesions it induces, and to analyse mitochondrial (mt) genetic markers for systematic and molecular epidemiological studies. The morphological findings indicate that Dictyocaulus lungworms of European bison can be distinguished from those of cattle on the basis of differences in buccal capsule wall length, total body length, and spicules length in males, all of which were significantly longer in those of European bison. Nucleotide diversity calculated from pairwise sequence alignments of partial cytochrome c oxidase subunit 1 (cox1), cytochrome B (cytB) and NADH dehydrogenase subunit 5 (nad5) of specimens from cattle and European bison varied from 1.7% for nad5, 2.1% for cytB, to 3.7% for cox1 gene. Thus, among the lungworms of European bison and cattle, nad5 and cytB were the most conserved proteins, whereas cox1 was the most diverse. The mt cytB marker gene may be a suitable candidate for distinguishing between the two genotypes, as nad5 demonstrated the greatest within-genus sequence variation. The lung tissue of infected European bison manifests signs of verminous pneumonia characterized by interstitial pneumonia, bronchitis and bronchiolitis. Therefore, it appears that European bison and cattle are infected with slightly diverged, morphologically-different, genotypes of D. viviparus, indicating they belong to two separate worm populations. We propose, therefore, that the lungworm of European bison should be classified as D. viviparus subsp. bisontis. European bison harbour a unique morphotype and genotype of Dictyocaulus viviparus. Mt cytB is an efficient genetic marker for studying large lungworms in bovids. European bison lungworm can be classified as D. viviparus subsp. bisontis. Pathologies induced by a newly described nematode subspecies mirrored those of lungworm in cattle.
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Affiliation(s)
- Anna M Pyziel
- Institute of Veterinary Medicine, Warsaw University of Life Sciences (WULS-SGGW), Department of Food Hygiene and Public Health Protection, Nowoursynowska 159, 02-776, Warsaw, Poland
| | - Zdzisław Laskowski
- Polish Academy of Sciences, W. Stefański Institute of Parasitology, Twarda 51/55, 00-818, Warsaw, Poland
| | - Izabella Dolka
- Institute of Veterinary Medicine, Warsaw University of Life Sciences (WULS-SGGW), Department of Pathology and Veterinary Diagnostics, Division of Animal Pathology, Nowoursynowska 159c, 02-776, Warsaw, Poland
| | | | - Julita Nowakowska
- Institute of Biology, University of Warsaw, Laboratory of Electron & Confocal Microscopy, Miecznikowa 1, 20-096, Warsaw, Poland
| | - Daniel Klich
- Institute of Animal Sciences, Warsaw University of Life Sciences (WULS-SGGW), Department of Animal Genetics and Conservation, Ciszewskiego 8, 02-787, Warsaw, Poland
| | - Wojciech Bielecki
- Institute of Veterinary Medicine, Warsaw University of Life Sciences (WULS-SGGW), Department of Pathology and Veterinary Diagnostics, Division of Avian Diseases, Exotic Animals and Fish, Ciszewskiego 8, 02-786, Warsaw, Poland
| | - Marta Żygowska
- Institute of Veterinary Medicine, Warsaw University of Life Sciences (WULS-SGGW), Department of Food Hygiene and Public Health Protection, Nowoursynowska 159, 02-776, Warsaw, Poland
| | - Madeleine Moazzami
- Swedish University of Agricultural Sciences (SLU), Department of Biomedical Sciences and Veterinary Public Health (BVF), Division of Bacteriology and Food Safety, Box 7035, 75007, Uppsala, Sweden
| | - Krzysztof Anusz
- Institute of Veterinary Medicine, Warsaw University of Life Sciences (WULS-SGGW), Department of Food Hygiene and Public Health Protection, Nowoursynowska 159, 02-776, Warsaw, Poland
| | - Johan Höglund
- Swedish University of Agricultural Sciences (SLU), Department of Biomedical Sciences and Veterinary Public Health (BVF), Division of Parasitology, Box 7035, 75007, Uppsala, Sweden
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