Results 181 to 190 of about 5,419 (211)
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Neorickettsial Endosymbionts of the Digenea
2012Digeneans are endoparasitic flatworms with complex life cycles and distinct life stages that parasitize different host species. Some digenean species harbour bacterial endosymbionts known as Neorickettsia (Order Rickettsiales, Family Anaplasmataceae). Neorickettsia occur in all life stages and are maintained by vertical transmission.
Jefferson A. Vaughan +2 more
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The diversity of the Digenea of Australian animals
International Journal for Parasitology, 1998The Digenea is one of five major helminth assemblages represented in Australian animals. History of the study of digeneans in Australia is reviewed briefly to show that it has never been subjected to the kind of sustained study needed to reach an understanding of it. The Australian vertebrate fauna comprises over 5500 species.
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The evolutionary expansion and host-parasite relationships of the Digenea
International Journal for Parasitology, 1994Relevant data on the Digenea extracted from a host-parasite data-base are analysed in relation to host-groups, host-specificity, speciation, radiation and geographical distribution. The classification, evolution, co-evolution, and co-speciation of the group are discussed.
Rodney A. Bray, David I. Gibson
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Control of Swimming in Cercariae of Proterometra macrostoma (Digenea)
The Journal of Parasitology, 1983A specific acetylcholinesterase (AChE) was localized histochemically in Proterometra macrostoma cercariae. This esterase activity was inhibited by eserine, but was resistant to tetraisopropyl pyrophosphoramide. A transverse band of intense AChE activity was observed in the posterior region of the tail.
David J. Prior, Gary L. Uglem
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Interpretation of life history pattern in the Digenea
International Journal for Parasitology, 1974Abstract The nature of secondary multiplication in the Digenea, especially in the molluscan host is reviewed. The concepts of alternation of generations and polyembryony are examined and discarded as unhelpful. In the absence of both meiosis and recognizable ovaries in miracidia, sporocysts and rediae, there are no criteria for distinguishing diploid
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Opistholobetines (Digenea: Opecoelidae) in Australian tetraodontiform fishes
Systematic Parasitology, 2018Opistholebetine opecoelids are reported following examination of 1,041 individual tetraodontiform fishes, comprising 60 species and seven families, collected in Australian waters between 1986 and 2018. Nine species consistent with Opistholebes Nicoll, 1915, Heterolebes Ozaki, 1935 or Maculifer Nicoll, 1915 were recovered. However, phylogenetic analysis
Storm B. Martin +3 more
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Journal of Wildlife Diseases, 1988
Over the past 20 yr, recurrent late-summer mortality of dabbling ducks in southern Québec has been attributed to the digenean parasite Cyathocotyle bushiensis. This study attempted to determine whether this parasite was still implicated in the epizootics, and examined aspects of the ecology of the parasite in the definitive host.
John Hoeve, Marilyn E. Scott
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Over the past 20 yr, recurrent late-summer mortality of dabbling ducks in southern Québec has been attributed to the digenean parasite Cyathocotyle bushiensis. This study attempted to determine whether this parasite was still implicated in the epizootics, and examined aspects of the ecology of the parasite in the definitive host.
John Hoeve, Marilyn E. Scott
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2016
???????????????????? ???????????????? ???????? ?? ?????????????????????????? ???????????? ???????????????? Echinoparyphium aconiatum Dietz, 1909; Haematoloechus asper Looss, 1899; Plagiorchis elegans (Rudolphi, 1802) Braun, 1902; Notocotylus attenuatus Rudolphi, 1809 ???? ?????????????????? Lymnaea stagnalis (L.) ?? Planorbarius corneus (L.). ??????????
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???????????????????? ???????????????? ???????? ?? ?????????????????????????? ???????????? ???????????????? Echinoparyphium aconiatum Dietz, 1909; Haematoloechus asper Looss, 1899; Plagiorchis elegans (Rudolphi, 1802) Braun, 1902; Notocotylus attenuatus Rudolphi, 1809 ???? ?????????????????? Lymnaea stagnalis (L.) ?? Planorbarius corneus (L.). ??????????
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Thetines and Betaines of the Red Alga Digenea simplex
Journal of Natural Products, 1993From the aqueous extract of the red alga Digenea simplex, seven Dragendorff-positive compounds have been isolated and their structures determined by spectral and chemical methods. The taxonomic significance of their occurrence and possible biosynthetic relationships between some of these compounds are also discussed.
Angela Patti +4 more
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Experimental Infections of Waterfowl with Sphaeridiotrema globulus (Digenea)
Journal of Wildlife Diseases, 1989Sphaeridiotrema globulus in experimentally infected mute swans (Cygnus olor), mallard ducks (Anas platyrhynchos) and Canada geese (Branta canadensis) induced ulcerative hemorrhagic enteritis. Sites of infection include the jejunum and ileum. The digeneans ulcerated the intestine. The inflammatory response was primarily lymphocytic with some eosinophils.
Jane E. Huffman, Douglas E. Roscoe
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