Vasyl V Tkach

Summary

Affiliation: University of North Dakota
Country: USA

Publications

  1. doi request reprint Molecular phylogeny and systematics of the Echinostomatoidea Looss, 1899 (Platyhelminthes: Digenea)
    Vasyl V Tkach
    Department of Biology, University of North Dakota, 10 Cornell Street, Grand Forks, ND 58202, USA Electronic address
    Int J Parasitol 46:171-85. 2016
  2. ncbi request reprint Morphological and molecular differentiation of Staphylocystis clydesengeri n. sp. (Cestoda, Hymenolepididae) from the vagrant shrew, Sorex vagrans (Soricomorpha, Soricidae), in North America
    Vasyl V Tkach
    Department of Biology, University of North Dakota, 10 Cornell Street, Grand Forks, North Dakota 58202, USA
    Zootaxa 3691:389-400. 2013
  3. doi request reprint Prosthenystera oonastica n. sp. (Digenea: Callodistomidae) from ictalurid catfishes in southeastern United States and molecular evidence differentiating species in the genus across Americas
    Vasyl V Tkach
    Department of Biology, University of North Dakota, 1 Campus Drive and Cornell Street, Grand Forks, ND, 58202, USA
    Syst Parasitol 90:39-51. 2015
  4. doi request reprint Molecular insight into systematics, host associations, life cycles and geographic distribution of the nematode family Rhabdiasidae
    Vasyl V Tkach
    Department of Biology, University of North Dakota, 1 Campus Drive and Cornell Street, Grand Forks, ND 58202, USA Electronic address
    Int J Parasitol 44:273-84. 2014
  5. doi request reprint Phylogenetic affinities and systematic position of Entomelas sylvestris Baker, 1982 (Nematoda: Rhabdiasidae), a parasite of Breviceps sylvestris FitzSimons (Amphibia: Brevicipitidae) in South Africa
    Vasyl V Tkach
    Department of Biology, University of North Dakota, 10 Cornell Street, Grand Forks, ND, 58202, USA
    Syst Parasitol 87:293-8. 2014
  6. doi request reprint Alloglossidium demshini sp. nov. (Digenea: Macroderoididae) from leeches in Minnesota
    Vasyl V Tkach
    Department of Biology, University of North Dakota, Grand Forks, North Dakota, 58202, USA
    Acta Parasitol 58:434-40. 2013
  7. doi request reprint Egg ultrastructure of the amabiliid cestode Tatria biremis Kowalewski, 1904 (Cyclophyllidea, Amabiliidae), with an emphasis on the oncospheral envelopes
    Vasyl Tkach
    Department of Biology, University of North Dakota, 10 Cornell Street, Grand Forks, ND 58202 9019, USA
    Acta Parasitol 58:269-77. 2013
  8. doi request reprint Morphological and molecular differentiation of two new species of Pseudoacanthocephalus Petrochenko, 1958 (Acanthocephala: Echinorhynchidae) from amphibians and reptiles in the Philippines, with identification key for the genus
    Vasyl V Tkach
    Department of Biology, University of North Dakota, 10 Cornell Street, Grand Forks, ND 58202, USA
    Syst Parasitol 85:11-26. 2013
  9. doi request reprint New records of acanthocephalans from birds in the Philippines with a description of a new Porrorchis species and identification keys for the genus
    Olga I Lisitsyna
    Institute of Zoology, Ukrainian National Academy of Sciences, Kiev, Ukraine
    J Parasitol 98:1176-84. 2012
  10. doi request reprint New genetic lineages, host associations and circulation pathways of Neorickettsia endosymbionts of digeneans
    Vasyl V Tkach
    Department of Biology, University of North Dakota, Grand Forks, 58202, USA
    Acta Parasitol 57:285-92. 2012

Detail Information

Publications38

  1. doi request reprint Molecular phylogeny and systematics of the Echinostomatoidea Looss, 1899 (Platyhelminthes: Digenea)
    Vasyl V Tkach
    Department of Biology, University of North Dakota, 10 Cornell Street, Grand Forks, ND 58202, USA Electronic address
    Int J Parasitol 46:171-85. 2016
    ..str.); and (v) refinements of the generic boundaries within the Echinostomatidae (s. str.), Psilostomidae and Fasciolidae are made. ..
  2. ncbi request reprint Morphological and molecular differentiation of Staphylocystis clydesengeri n. sp. (Cestoda, Hymenolepididae) from the vagrant shrew, Sorex vagrans (Soricomorpha, Soricidae), in North America
    Vasyl V Tkach
    Department of Biology, University of North Dakota, 10 Cornell Street, Grand Forks, North Dakota 58202, USA
    Zootaxa 3691:389-400. 2013
    ..furcara (Stieda, 1862). Rodentolepis gnoskei Greiman & Tkach, 2012 is transferred to Pararodentolepis Makarikov and Gulyaev, 2009 as a new combination Pararodentolepis gnoskei (Greiman & Tkach, 2012) n. comb...
  3. doi request reprint Prosthenystera oonastica n. sp. (Digenea: Callodistomidae) from ictalurid catfishes in southeastern United States and molecular evidence differentiating species in the genus across Americas
    Vasyl V Tkach
    Department of Biology, University of North Dakota, 1 Campus Drive and Cornell Street, Grand Forks, ND, 58202, USA
    Syst Parasitol 90:39-51. 2015
    ..oonastica n. sp. and P. obesa than either has had with P. caballeroi. ..
  4. doi request reprint Molecular insight into systematics, host associations, life cycles and geographic distribution of the nematode family Rhabdiasidae
    Vasyl V Tkach
    Department of Biology, University of North Dakota, 1 Campus Drive and Cornell Street, Grand Forks, ND 58202, USA Electronic address
    Int J Parasitol 44:273-84. 2014
    ..Only a few smaller lineages of Rhabdias demonstrate relatively strict associations with a certain group of hosts. ..
  5. doi request reprint Phylogenetic affinities and systematic position of Entomelas sylvestris Baker, 1982 (Nematoda: Rhabdiasidae), a parasite of Breviceps sylvestris FitzSimons (Amphibia: Brevicipitidae) in South Africa
    Vasyl V Tkach
    Department of Biology, University of North Dakota, 10 Cornell Street, Grand Forks, ND, 58202, USA
    Syst Parasitol 87:293-8. 2014
    ..sylvestris appears, albeit with weak support, as a basal/sister taxon to the rest of Rhabdias spp. which explains to some extent the differences in the buccal capsule morphology between this species and other Rhabdias spp. ..
  6. doi request reprint Alloglossidium demshini sp. nov. (Digenea: Macroderoididae) from leeches in Minnesota
    Vasyl V Tkach
    Department of Biology, University of North Dakota, Grand Forks, North Dakota, 58202, USA
    Acta Parasitol 58:434-40. 2013
    ..oschmarini such as a V-shaped excretory bladder and the apparent presence of a true seminal receptacle in the latter species. These features need to be re-evaluated before any taxonomic decision can be made. ..
  7. doi request reprint Egg ultrastructure of the amabiliid cestode Tatria biremis Kowalewski, 1904 (Cyclophyllidea, Amabiliidae), with an emphasis on the oncospheral envelopes
    Vasyl Tkach
    Department of Biology, University of North Dakota, 10 Cornell Street, Grand Forks, ND 58202 9019, USA
    Acta Parasitol 58:269-77. 2013
    ..ultrastructural studies of the greater diversity of cestodes are needed to obtain comparative data for fruitful analysis of cyclophyllidean cestode adaptations to their diverse life cycles. ..
  8. doi request reprint Morphological and molecular differentiation of two new species of Pseudoacanthocephalus Petrochenko, 1958 (Acanthocephala: Echinorhynchidae) from amphibians and reptiles in the Philippines, with identification key for the genus
    Vasyl V Tkach
    Department of Biology, University of North Dakota, 10 Cornell Street, Grand Forks, ND 58202, USA
    Syst Parasitol 85:11-26. 2013
    ..This is the first report of Pseudoacanthocephalus in the Philippines. A key to known species of Pseudoacanthocephalus is provided...
  9. doi request reprint New records of acanthocephalans from birds in the Philippines with a description of a new Porrorchis species and identification keys for the genus
    Olga I Lisitsyna
    Institute of Zoology, Ukrainian National Academy of Sciences, Kiev, Ukraine
    J Parasitol 98:1176-84. 2012
    ..A key to the identification of all known species of Porrorchis (other than insufficiently described Porrorchis brevicanthus) is provided...
  10. doi request reprint New genetic lineages, host associations and circulation pathways of Neorickettsia endosymbionts of digeneans
    Vasyl V Tkach
    Department of Biology, University of North Dakota, Grand Forks, 58202, USA
    Acta Parasitol 57:285-92. 2012
    ..Our results suggest that our current knowledge of the diversity, host associations and circulation of neorickettsiae is far from satisfactory...
  11. doi request reprint A new species of Rhabdias (Nematoda: Rhabdiasidae) from agamid lizards on Luzon Island, Philippines
    Yuriy Kuzmin
    Institute of Zoology, Ukrainian National Academy of Sciences, Kiev, Ukraine
    J Parasitol 98:608-11. 2012
    ..This species is morphologically distinct from other Rhabdias spp. that parasitize reptilian and amphibian hosts, including 3 other species known to parasitize lizards of the Agamidae...
  12. doi request reprint Aptorchis glandularis n. sp. (Digenea: Plagiorchioidea) from the northwestern red-faced turtle, Emydura australis, (Pleurodira: Chelidae) in the Kimberley, Western Australia
    Vasyl V Tkach
    Department of Biology, University of North Dakota, Grand Forks, North Dakota 58202, USA
    J Parasitol 94:918-24. 2008
    ..pearsoni + A. megacetabulus) and (A. aequalis + A. glandularis n. sp.), with A. megapharynx representing a separate lineage. This is the first report of an endoparasite from Emydura australis...
  13. doi request reprint A new Paramacroderoides species (Digenea: Macroderoididae) from two species of gar in the southeastern United States
    Vasyl V Tkach
    Department of Biology, University of North Dakota, 10 Cornell Street, Grand Forks, North Dakota 58202, USA
    J Parasitol 96:1002-6. 2010
    ....
  14. doi request reprint A new species of blood fluke (Digenea: Spirorchiidae) from the Malayan box turtle, Cuora amboinensis (Cryptodira: Geomydidae) in Thailand
    Vasyl V Tkach
    Department of Biology, University of North Dakota, Grand Forks, North Dakota 58202, USA
    J Parasitol 95:743-6. 2009
    ..A phylogenetic analysis using molecular characters places the new species in the basal clade of tetrapod blood flukes, more derived than Spirhapalum polesianum, but less derived than Spirorchis spp...
  15. doi request reprint New Macroderoides (Digenea: Macroderoididae) from Florida gar, with molecular phylogeny of the genus
    Vasyl V Tkach
    Department of Biology, University of North Dakota, 10 Cornell Street, Grand Forks, North Dakota 58202, USA
    J Parasitol 97:920-3. 2011
    ..It has also revealed for the first time the phylogenetic affinities of M. flavus, which is the only North American member of Macroderoides that switched from holostean fishes to teleosts...
  16. ncbi request reprint A new species of Rhabdias from lungs of the wood frog, Rana sylvatica, in North America: the last sibling of Rhabdias ranae?
    Vasyl V Tkach
    Department of Biology, University of North Dakota, Grand Forks 58202, USA
    J Parasitol 92:631-6. 2006
    ..sylvatica and Ra. pipiens, and supports the status of R. bakeri as a new species...
  17. pmc Germs within Worms: Localization of Neorickettsia sp. within Life Cycle Stages of the Digenean Plagiorchis elegans
    Stephen E Greiman
    Department of Biology, University of North Dakota, Grand Forks, North Dakota, USA
    Appl Environ Microbiol 82:2356-62. 2016
    ..g.,Rickettsia and Wolbachia)...
  18. ncbi request reprint Neosychnocotyle maggiae, n. gen., n. sp. (Platyhelminthes: Aspidogastrea) from freshwater turtles in northern Australia
    Scott D Snyder
    Department of Biology, University of Nebraska at Omaha, Omaha, Nebraska 68182, USA
    J Parasitol 93:399-403. 2007
    ..gen., n. sp. It is possible that this new parasite may reach sexual maturity only in C. insculpta. This is only the second aspidogastrean species reported from Australian freshwater turtles...
  19. doi request reprint A new species of Crepidostomum (Digenea: Allocreadiidae) from Hiodon tergisus in Mississippi and molecular comparison with three congeners
    Vasyl V Tkach
    University of North Dakota, Department of Biology, Starcher Hall Box 9019, 10 Cornell St, Grand Forks, North Dakota 58202
    J Parasitol 99:1114-21. 2013
    ..affine n. sp. These results add to previously published data reporting species of fish digeneans that might be endemic to the Pearl and Pascagoula river basins in Mississippi...
  20. doi request reprint Haplorchis popelkae N. SP. (Digenea: Heterophyidae) from short-necked turtles (Chelidae) in Northern Australia
    Scott D Snyder
    Department of Biology, University of Nebraska, Omaha, Nebraska 68182, USA
    J Parasitol 95:204-7. 2009
    ..This is the first report of Haplorchis in turtles...
  21. ncbi request reprint Aptorchis megacetabulus n. sp. (Platyhelminthes: Digenea) from the northern long-necked turtle, Chelodina rugosa (Pleurodira: Chelidae), in Australia
    Vasyl V Tkach
    Department of Biology, University of North Dakota, Grand Forks, North Dakota 58202, USA
    J Parasitol 93:404-8. 2007
    ..Comparison of approximately 2,700 bases of ribosomal DNA obtained from all known Aptorchis species strongly supports the status of Aptorchis megacetabulus n. sp. as a new species...
  22. ncbi request reprint Molecular phylogenetic analysis of the Microphalloidea Ward, 1901 (Trematoda: Digenea)
    Vasyl V Tkach
    Department of Biology, University of North Dakota Grand Forks, PO Box 9019, Grand Forks, ND 58202 9019, USA
    Syst Parasitol 56:1-15. 2003
    ..Previous systematic schemes are discussed from the viewpoint of present results, and perspectives of future studies are outlined...
  23. doi request reprint A new species of Opisthioglyphe (Trematoda: Telorchiidae) from gall bladder of turtles in Malaysia
    Vasyl V Tkach
    Department of Biology, University of North Dakota, Grand Forks, ND 58202, USA
    J Parasitol 98:863-8. 2012
    ....
  24. doi request reprint Serpentoanisocladium sinense n. g., n. sp. (Digenea: Cryptogonimidae) from the eastern water snake Sinonatrix percarinata (Boulenger) (Serpentes: Colubridae) in Guizhou Province, China
    Vasyl V Tkach
    Department of Biology, University of North Dakota, Grand Forks, North Dakota, 58202, USA
    Syst Parasitol 76:205-10. 2010
    ..A diagnosis of the new genus and a description of the new species are provided. This is the first cryptogonimid found in snakes from China and the first cryptogonimid reported from S. percarinata...
  25. doi request reprint Description and molecular differentiation of a new Staphylocystoides (Cyclophyllidea: Hymenolepididae) from the dusky shrew Sorex monticolus in Southeast Alaska
    Stephen E Greiman
    Department of Biology, University of North Dakota, 10 Cornell Street, Grand Forks, North Dakota 58202
    J Parasitol 99:1045-9. 2013
    ..gulyaevi n. sp. as a new species. The new species is the seventh species of Staphylocystoides found in North America and the first cestode or any helminth reported from shrews in southeast Alaska...
  26. doi request reprint Macroderoides texanus n. sp. (Digenea: Macroderoididae) from alligator gar, Atractosteus spatula in Texas
    Vasyl V Tkach
    Department of Biology, University of North Dakota, Grand Forks, ND 58202 9019, USA
    Parasitol Res 104:27-33. 2008
    ..texanus n. sp., M. spiniferus and M. trilobatus, strongly supports the status of M. texanus n. sp. as a new species...
  27. pmc A new real-time PCR protocol for detection of avian haemosporidians
    Jeffrey A Bell
    Department of Biology, University of North Dakota, 10 Cornell Street STOP 9019, Grand Forks, ND, 58202, USA
    Parasit Vectors 8:383. 2015
    ..Here we report a newly developed real-time PCR protocol designed to quickly and reliably detect all three genera of avian haemosporidians in a single biochemical reaction...
  28. doi request reprint Description and phylogenetic relationships of Rodentolepis gnoskei n. sp. (Cyclophyllidea: Hymenolepididae) from a shrew Suncus varilla minor in Malawi
    Stephen E Greiman
    Department of Biology, University of North Dakota, 10 Cornell Street, Grand Forks, North Dakota 58202, USA
    Parasitol Int 61:343-50. 2012
    ..Rodentolepis gnoskei n. sp. is the first tapeworm species reported from shrews in Malawi and the first species of cestode reported from S. varilla minor and any member of Suncus in Africa...
  29. doi request reprint Neorickettsial endosymbionts of the digenea: diversity, transmission and distribution
    Jefferson A Vaughan
    Department of Biology, University of North Dakota, Grand Forks, ND, USA
    Adv Parasitol 79:253-97. 2012
    ..Rapid advances in molecular tools and their application towards bacterial identification bode well for our future progress in understanding the biology of Neorickettsia...
  30. pmc Real-time PCR detection and phylogenetic relationships of Neorickettsia spp. in digeneans from Egypt, Philippines, Thailand, Vietnam and the United States
    Stephen E Greiman
    Department of Biology, Georgia Southern University, Statesboro, Georgia 30460, USA Department of Biology, University of North Dakota, Grand Forks, North Dakota 58202, USA
    Parasitol Int 66:1003-1007. 2017
    ..Our findings suggest that further surveys from the African continent, SE Asia, and island countries are likely to reveal new Neorickettsia lineages as well as new digenean host associations...
  31. pmc Transmission rates of the bacterial endosymbiont, Neorickettsia risticii, during the asexual reproduction phase of its digenean host, Plagiorchis elegans, within naturally infected lymnaeid snails
    Stephen E Greiman
    Department of Biology, University of North Dakota, 10 Cornell St, Grand Forks, North Dakota 58202, USA
    Parasit Vectors 6:303. 2013
    ..This study quantified the transmission of Neorickettsia during the asexual reproductive phase of a digenean parasite, Plagiorchis elegans, developing within naturally parasitized lymnaeid pond snails...
  32. ncbi request reprint Rhabdias kongmongthaensis sp. n. (Nematoda: Rhabdiasidae) from Polypedates leucomystax (Amphibia: Anura: Rhacophoridae) in Thailand
    Yuriy Kuzmin
    Department of Parasitology, Institute of Zoology, 15 Bogdan Khmelnitsky Street, Kiev, Ukraine
    Folia Parasitol (Praha) 52:339-42. 2005
    ..Presence of lateral pseudolabia distinguishes the new species from the geographically closest Rhabdias species as well as from those parasitizing other rhacophorid frogs...
  33. doi request reprint Paraoistosomum novaeguineae n. gen., n. sp. (Digenea) from a New Guinea crocodile: a surprising relative of the enigmatic Oistosomum caduceus Odhner, 1902
    Vasyl V Tkach
    Department of Biology, University of North Dakota, 10 Cornell Street, Grand Forks, North Dakota 58202, USA
    J Parasitol 97:717-20. 2011
    ..gen., n. sp. suggests that these genera may not belong to the Plagiorchiidae, the current familial allocation of Oistosomum. Scarcity of material and lack of molecular data do not permit clarification of this problem at the present time...
  34. pmc Laboratory maintenance of the bacterial endosymbiont, Neorickettsia sp., through the life cycle of a digenean, Plagiorchis elegans
    Stephen E Greiman
    Department of Biology, University of North Dakota, Grand Forks, ND 58202, USA Electronic address
    Exp Parasitol 157:78-83. 2015
    ..This paper focuses on the development of the laboratory life cycle, as well as outlines its potential uses in studying the transmission biology of Neorickettsia and its evolutionary relationship within its digenean host. ..
  35. pmc Large scale screening of digeneans for Neorickettsia endosymbionts using real-time PCR reveals new Neorickettsia genotypes, host associations and geographic records
    Stephen E Greiman
    Department of Biology, University of North Dakota, Grand Forks, North Dakota, United States of America
    PLoS ONE 9:e98453. 2014
    ..Our findings suggest that further surveys from broader geographic regions and wider selection of digenean taxa are likely to reveal new Neorickettsia lineages as well as new digenean host associations. ..
  36. ncbi request reprint Two new species of Choanocotyle Jue Sue and Platt, 1998 (Digenea: Choanocotylidae) from an Australian freshwater turtle (Testudines: Pleurodira: Chelidae)
    Thomas R Platt
    Department of Biology, Saint Mary s College, Notre Dame, Indiana 46556, USA
    J Parasitol 89:145-50. 2003
    ..Comparative analysis of the sequences of different nuclear ribosomal deoxyribonucleic acid regions of C. nematoides and C. hobbsi has confirmed that they are closely related but distinct species...
  37. doi request reprint The numbers game: quantitative analysis of Neorickettsia sp. propagation through complex life cycle of its digenean host using real-time qPCR
    Stephen E Greiman
    Department of Biology, University of North Dakota, Grand Forks, ND, 58202, USA
    Parasitol Res 115:2779-88. 2016
    ..These two periods seem to be the most important for Neorickettsia propagation through the complex digenean life cycle and maturation in the definitive host. ..
  38. pmc Nanophyetus salmincola, vector of the salmon poisoning disease agent Neorickettsia helminthoeca, harbors a second pathogenic Neorickettsia species
    Stephen E Greiman
    Department of Biology, University of North Dakota, Grand Forks, ND, 10 Cornell Street, 58202, USA Department of Biology, Georgia Southern University, Statesboro, GA, 30460, USA
    Vet Parasitol 229:107-109. 2016
    ..The EFF agent has not been sequenced. In this study we identified N. salmincola as the vector of yet additional species of Neorickettsia known as Stellanchasmus falcatu (SF) agent using DNA sequencing...