{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2025,12,31]],"date-time":"2025-12-31T17:49:00Z","timestamp":1767203340075,"version":"build-2238731810"},"reference-count":46,"publisher":"Frontiers Media SA","license":[{"start":{"date-parts":[[2024,2,8]],"date-time":"2024-02-08T00:00:00Z","timestamp":1707350400000},"content-version":"vor","delay-in-days":0,"URL":"https:\/\/creativecommons.org\/licenses\/by\/4.0\/"}],"content-domain":{"domain":["frontiersin.org"],"crossmark-restriction":true},"short-container-title":["Front. Vet. Sci."],"abstract":"<jats:p>\n                    The trichostrongylid roundworms of the genus\n                    <jats:italic>Cooperia<\/jats:italic>\n                    , which are important in veterinary medicine, currently comprise 19 valid species that parasitize the small intestine of both free-living and domestic ruminants. Only four\n                    <jats:italic>Cooperia<\/jats:italic>\n                    spp. have been reported in Europe, namely\n                    <jats:italic>C. oncophora, C. punctata, C. curticei<\/jats:italic>\n                    and\n                    <jats:italic>C. pectinata<\/jats:italic>\n                    . In 2018\u20132022, 25 red deer (\n                    <jats:italic>Cervus elaphus<\/jats:italic>\n                    ) and 30 sika deer (\n                    <jats:italic>Cervus nippon<\/jats:italic>\n                    ) of both sexes and various ages from several remote locations in the Czech Republic were parasitologically examined. Intestinal nematodes of the genus\n                    <jats:italic>Cooperia<\/jats:italic>\n                    were found only in two northern regions. Using the globally recognized key book on trichostrongylid nematodes, they were preliminarily identified as\n                    <jats:italic>C. pectinata<\/jats:italic>\n                    . However, a molecular analysis of\n                    <jats:italic>cox<\/jats:italic>\n                    2 and ITS rDNA gene sequences revealed that\n                    <jats:italic>Cooperia<\/jats:italic>\n                    sp. parasitizing Czech deer is a separate taxon that is more closely related to\n                    <jats:italic>C. oncophora<\/jats:italic>\n                    than to\n                    <jats:italic>C. pectinata<\/jats:italic>\n                    . A subsequent morphological analysis and literature survey confirmed the independence of deer\n                    <jats:italic>Cooperia<\/jats:italic>\n                    sp., which is similar but not identical to bovid\n                    <jats:italic>C. pectinata<\/jats:italic>\n                    . Previous long-term correct identifications of bovid\n                    <jats:italic>C. pectinata<\/jats:italic>\n                    and misidentifications of deer\n                    <jats:italic>Cooperia<\/jats:italic>\n                    species were caused by a fundamental error in the key book mentioned above. Interestingly, the ancient trichostrongylid nematode\n                    <jats:italic>Strongylus ventricosus<\/jats:italic>\n                    from the type host red deer (\n                    <jats:italic>Cervus elaphus<\/jats:italic>\n                    ) shot near Greifswald (Germany) was described by Rudolphi in 1809. Rudolphi's type material (one male and four females) was deposited in the Museum f\u00fcr Naturkunde (Berlin). Later, the ancient species\n                    <jats:italic>S. ventricosus<\/jats:italic>\n                    was taken as a synonym for various\n                    <jats:italic>Cooperia<\/jats:italic>\n                    spp. Our current re-examination of the type male indicated that there is a relatively good agreement with our new material from Czech deer regarding the most important characteristics of\n                    <jats:italic>S. ventricosus<\/jats:italic>\n                    (i.e., the shape and size of the male spicules); however, Rudolphi's type material is in rather poor condition. The suggested resurrection of the deer\n                    <jats:italic>Cooperia<\/jats:italic>\n                    sp. in this study as\n                    <jats:italic>Cooperia ventricosa<\/jats:italic>\n                    (Rudolphi, 1809) requires verification by collecting and analyzing new nematode material from the type locality near Greifswald.\n                  <\/jats:p>","DOI":"10.3389\/fvets.2024.1346417","type":"journal-article","created":{"date-parts":[[2024,2,8]],"date-time":"2024-02-08T00:16:23Z","timestamp":1707351383000},"update-policy":"https:\/\/doi.org\/10.3389\/crossmark-policy","source":"Crossref","is-referenced-by-count":0,"title":["A revision of the trichostrongylid nematode Cooperia Ransom, 1907, from deer game: recent integrative research confirms the existence of the ancient host-specific species Cooperia ventricosa (Rudolphi, 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