Genetic characterisation of Echinocephalus spp. (Nematoda: Gnathostomatidae) from marine hosts in Australia.

Autor:	Karagiorgis C; Department of Veterinary Biosciences, Melbourne Veterinary School, University of Melbourne, Werribee, Victoria, Australia., Ploeg RJ; Department of Veterinary Biosciences, Melbourne Veterinary School, University of Melbourne, Werribee, Victoria, Australia., Ghafar A; Department of Veterinary Biosciences, Melbourne Veterinary School, University of Melbourne, Werribee, Victoria, Australia., Gauci CG; Department of Veterinary Biosciences, Melbourne Veterinary School, University of Melbourne, Werribee, Victoria, Australia., Sukee T; Department of Veterinary Biosciences, Melbourne Veterinary School, University of Melbourne, Werribee, Victoria, Australia., Cutmore SC; School of Biological Sciences, The University of Queensland, St Lucia, 4072, Australia., Claybrook J; Environmental and Conversation Sciences and Centre for Sustainable Aquatic Ecosystems, Murdoch University, Murdoch, Western Australia, Australia., Loneragan NR; Environmental and Conversation Sciences and Centre for Sustainable Aquatic Ecosystems, Murdoch University, Murdoch, Western Australia, Australia., Wee NQ; School of Biological Sciences, The University of Queensland, St Lucia, 4072, Australia., Gillett AK; Australia Zoo Wildlife Hospital, Beerwah, Queensland, Australia., Beveridge I; Department of Veterinary Biosciences, Melbourne Veterinary School, University of Melbourne, Werribee, Victoria, Australia., Jabbar A; Department of Veterinary Biosciences, Melbourne Veterinary School, University of Melbourne, Werribee, Victoria, Australia.
Jazyk:	angličtina
Zdroj:	International journal for parasitology. Parasites and wildlife [Int J Parasitol Parasites Wildl] 2022 Jan 06; Vol. 17, pp. 161-165. Date of Electronic Publication: 2022 Jan 06 (Print Publication: 2022).
DOI:	10.1016/j.ijppaw.2021.12.012
Abstrakt:	We genetically characterised larval and adult specimens of species of Echinocephalu s Molin, 1858 (Gnathostomatidae) collected from various hosts found within Australian waters. Adult specimens of Echinocephalus were collected from a dasyatid stingray [ Pastinachus ater (Macleay); n = 2] from Moreton Bay, Queensland and larvae from a hydrophiine sea snake [ Hydrophis peronii (Duméril); n = 3] from Cape York Peninsula, Queensland, from an octopus ( Octopus djinda Amor & Hart; n = 3) from Fremantle, Western Australia and from a lucinid bivalve [ Codakia paytenorum (Iredale); n = 5] from Heron Island, Queensland Australia. All nematode samples were identified morphologically and genetically characterised using the small subunit nuclear ribosomal DNA (SSU). Some morphological differences were identified between previous studies of Echinocephalus spp. and those observed herein but the significance of these differences remains unresolved. Molecular phylogenetic analyses revealed that larval Echinocephalus sp. from H. peronii and C. paytenorum in Australia were very similar (with strong nodal support) to larval Echinocephalus sp. infecting two fish species from Egypt, Saurida undosquamis (Richardson) (Synodontidae) and Pagrus pagrus (Linnaeus) (Sparidae). The SSU sequences of larval Echinocephalus sp . from O. djinda and adults from P. ater formed a well-supported clade with that of adult E. overstreeti Deardorff and Ko, 1983 from the Port Jackson shark, Heterodontus portusjacksoni (Meyer), as well as that of the larval Echinocephalus sp., from the common carp ( Cyprinus carpio Linnaeus) from Egypt. This study extends the intermediate host range of Echinocephalus larvae by including a sea snake for the first time. Findings of this study highlight the importance of genetic characterisation of larval and adult specimens of Echinocephalus spp. to resolve the current difficulties in the taxonomy of this genus. Competing Interests: The authors declare that they have no known competing financial interests or personal relationships that could have appeared to influence the work reported in this paper. (© 2022 The Authors.)
Databáze:	MEDLINE
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