Results 181 to 190 of about 5,374 (221)

Experimental Infections of Waterfowl with Sphaeridiotrema globulus (Digenea)

Journal of Wildlife Diseases, 1989
Sphaeridiotrema 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.
J E, Huffman, D E, Roscoe
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A Phylogeny of Life-cycle Patterns of the Digenea

1972
A comparison of helminth life-cycles reveals a number of singular features in the digenean pattern. Thus, in addition to the most singular feature, alternation of generations, there is the ubiquity of the cercaria, a stage designed for escape from the molluscan first host and for swimming, two patterns of behavior that are not called for in many life ...
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A molecular phylogeny of the genus Ichthyocotylurus (Digenea, Strigeidae)

International Journal for Parasitology, 2001
Three nucleotide data sets, two nuclear (ribosomal internal transcribed spacer regions 1 and 2, ITS1 and ITS2) and one mitochondrial (cytochrome c oxidase subunit 1, CO1), were analysed using distance matrix and maximum likelihood methods to determine the inter-relationships amongst the four species attributed to the genus Ichthyocotylurus Odening ...
A S, Bell, C, Sommerville, E, Tellervo Valtonen   +2 more
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ECOLOGICAL STUDIES ON CYATHOCOTYLE BUSHIENSIS (DIGENEA) AND SPHAERIDIOTREMA GLOBULUS (DIGENEA), POSSIBLE PATHOGENS OF DABBLING DUCKS IN SOUTHERN QUÉBEC

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.
J, Hoeve, M E, Scott
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Ultrastructural study of vitellogenesis in Maritrema feliui (Digenea, Microphallidae)

Parasitology Research, 2011
During vitellogenesis in the microphallid trematode Maritrema feliui, we distinguished four stages: (I) a stem cell stage of the gonial type; (II) an early differentiation stage with the main cell activity concentrated on the initiation of protein synthetic activity and the beginning of shell globule formation; (III) an advanced differentiation stage ...
Zdzisław, Swiderski, Abdoulaye J S, Bakhoum, Isabel, Montoliu, Carlos, Feliu, David I, Gibson, Jordi, Miquel   +5 more
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Studies on some digenea of the familyDidymozoidae

Proceedings / Indian Academy of Sciences, 1966
In the light of the above discussion, it appears that the parasites and their hosts form a biotype which is both exclusive and interchangeable. In the former case it is of such an extreme association as to be confined to a very limited geographical region. Using the parasites as “biological tags” in such cases appears to have great possibilities.
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Molecular identification of developmental stages in Opecoelidae (Digenea).

International journal for parasitology, 1999
Nuclear ribosomal DNA sequences represent a useful tool for distinction of poorly differentiated developmental stages, such as trematode cercariae or metacercariae. Here, the complete internal transcribed spacer region of the ribosomal DNA (ITS 1 + 5.8S + ITS 2) was sequenced for 29 specimens of the digenean family Opecoelidae, including 16 adult ...
Jousson, Olivier, P. Bartoli, J. Pawlowski   +2 more
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A phylogenetic assessment ofPronoprymnaspp. (Digenea: Faustulidae) and Pacific and Antarctic representatives of the genusSteringophorusOdhner, 1905 (Digenea: Fellodistomidae), with description of a new species

Journal of Natural History, 2021
Sergey G Sokolov, Sergei V Shchenkov, Ilya I Gordeev   +2 more
exaly  

Digenea

2020
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?????????????????????????????? ???????????????????????? ?? ?????????????????????????????? ???????????? ?????????????????? Dicrocoelium petrowi (Digenea, Dicrocoeliidae)

2019
?????????????????? ???? ?????????????? (Alectoris chukar) ???? ?????????????????? ???????????? ?????????????????????????? ?????????????????? ???????????????? ????. ??. ??. ???????????????????????? ?????? ?????????????? ???????? ???????????????????? ???????? ?????? Dicrocoelium petrowi Kassimov, 1952 (Digenea, Dicrocoeliidae). ?? ???????????? ???????????
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