Transmission of lungworms of harbour porpoises and harbour seals: molecular tools determine potential vertebrate intermediate hosts

International Journal for Parasitology
K LehnertU Siebert

Abstract

Harbour porpoises (Phocoena phocoena) and harbour seals (Phoca vitulina) from German waters are infected by six species of lungworms (Metastrongyloidea). These nematodes parasitise the respiratory tract, are pathogenic and often cause secondary bacterial infections. In spite of their clinical and epidemiological significance, the life cycle and biology of lungworms in the marine environment is still largely unknown. Regions of ribosomal DNA (ITS-2) of all lungworms parasitising harbour porpoises and harbour seals in German waters were sequenced to characterise and compare the different species. The phylogenetic relationship among the lungworm species was analysed by means of their ITS-2 nucleotide sequences and the species-specific traits of the ITS-2 were used to screen wild fish as possible intermediate hosts for larval lungworms. Molecular markers were developed to identify larval nematodes via in-situ hybridisation of tissues of harbour porpoise and harbour seal prey fish. Potential wild intermediate fish hosts from the North Sea were dissected and found to harbour larval nematodes. Histological examination and in-situ hybridisation of tissue samples from these fish showed lungworm larvae within the intestinal wall. Based o...Continue Reading

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Citations

Feb 5, 2014·Diseases of Aquatic Organisms·Juan Antonio Balbuena, Andrew Simpkin
Mar 16, 2016·International Journal for Parasitology. Parasites and Wildlife·Sophia Arlena UlrichUrsula Siebert
Mar 25, 2016·Journal of Zoo and Wildlife Medicine : Official Publication of the American Association of Zoo Veterinarians·Kristy JacobusFlorina Tseng
Sep 4, 2015·Parasites & Vectors·Sophia Arlena UlrichChristina Strube
Jan 18, 2015·Parasitology Research·Abdurakhim E KuchboevGeorg von Samson-Himmelstjerna
Jan 9, 2014·Postgraduate Medical Journal·Jennifer WellerDavid Cumin
Aug 12, 2017·Parasitology Research·Kristina LehnertRobert Poulin
Aug 31, 2010·The Veterinary Record·Nick DavisonGail Wise
Jan 26, 2021·International Journal for Parasitology. Parasites and Wildlife·Anja ReckendorfChristina Strube
Apr 14, 2021·Parasites & Vectors·Rachel PoolFrancisco Javier Aznar

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