Sarcocystis arctosi sp. nov. (Apicomplexa, Sarcocystidae) from the brown bear (Ursus arctos), and its genetic similarity to schizonts of Sarcocystis canis-like parasite associated with fatal hepatitis in polar bears (Ursus maritimus)
Abstract The tissues of herbivores are commonly infected with cysts of parasites belonging to the apicomplexan genus Sarcocystis, but such sarcocysts are rare in bears. Here, we describe a new species, Sarcocystis arctosi, based on the mature sarcocysts identified in two brown bears (Ursus arctos) f...
Published in: | Acta Parasitologica |
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Walter de Gruyter GmbH
2007
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crdegruyter:10.2478/s11686-007-0048-6 2024-09-09T20:12:45+00:00 Sarcocystis arctosi sp. nov. (Apicomplexa, Sarcocystidae) from the brown bear (Ursus arctos), and its genetic similarity to schizonts of Sarcocystis canis-like parasite associated with fatal hepatitis in polar bears (Ursus maritimus) Dubey, J. Rosenthal, Benjamin Sundar, Natarajan Velmurugan, G. Beckmen, Kimberlee 2007 http://dx.doi.org/10.2478/s11686-007-0048-6 http://link.springer.com/content/pdf/10.2478/s11686-007-0048-6.pdf http://link.springer.com/article/10.2478/s11686-007-0048-6/fulltext.html http://link.springer.com/content/pdf/10.2478/s11686-007-0048-6 unknown Walter de Gruyter GmbH http://www.springer.com/tdm Acta Parasitologica volume 52, issue 4 ISSN 1896-1851 1230-2821 journal-article 2007 crdegruyter https://doi.org/10.2478/s11686-007-0048-6 2024-07-29T04:11:22Z Abstract The tissues of herbivores are commonly infected with cysts of parasites belonging to the apicomplexan genus Sarcocystis, but such sarcocysts are rare in bears. Here, we describe a new species, Sarcocystis arctosi, based on the mature sarcocysts identified in two brown bears (Ursus arctos) from Alaska, USA. Microscopic sarcocysts (37–75 × 20–42 μm) had thin walls (<1 μm). The outer layer of the sarcocyst, the parasitophorous vacuolar membrane (pvm), was wavy in outline and had minute undulations that did not invaginate towards the sarcocyst interior; these undulations occurred at irregular intervals and measured up to 100 nm in length and up to 60 nm width. The ground substance layer beneath the pvm was smooth and lacked microtubules. Longitudinally cut bradyzoites measured 5.6–6.8 × 0.7–1.8 μm. A major portion of nuclear small subunit rDNA sequence obtained from these sarcocysts was similar to that previously obtained from the hepatic schizonts of a S. canis-like parasite from polar bears (Ursus maritimus). Article in Journal/Newspaper Ursus arctos Ursus maritimus Alaska De Gruyter Acta Parasitologica 52 4 |
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De Gruyter |
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crdegruyter |
language |
unknown |
description |
Abstract The tissues of herbivores are commonly infected with cysts of parasites belonging to the apicomplexan genus Sarcocystis, but such sarcocysts are rare in bears. Here, we describe a new species, Sarcocystis arctosi, based on the mature sarcocysts identified in two brown bears (Ursus arctos) from Alaska, USA. Microscopic sarcocysts (37–75 × 20–42 μm) had thin walls (<1 μm). The outer layer of the sarcocyst, the parasitophorous vacuolar membrane (pvm), was wavy in outline and had minute undulations that did not invaginate towards the sarcocyst interior; these undulations occurred at irregular intervals and measured up to 100 nm in length and up to 60 nm width. The ground substance layer beneath the pvm was smooth and lacked microtubules. Longitudinally cut bradyzoites measured 5.6–6.8 × 0.7–1.8 μm. A major portion of nuclear small subunit rDNA sequence obtained from these sarcocysts was similar to that previously obtained from the hepatic schizonts of a S. canis-like parasite from polar bears (Ursus maritimus). |
format |
Article in Journal/Newspaper |
author |
Dubey, J. Rosenthal, Benjamin Sundar, Natarajan Velmurugan, G. Beckmen, Kimberlee |
spellingShingle |
Dubey, J. Rosenthal, Benjamin Sundar, Natarajan Velmurugan, G. Beckmen, Kimberlee Sarcocystis arctosi sp. nov. (Apicomplexa, Sarcocystidae) from the brown bear (Ursus arctos), and its genetic similarity to schizonts of Sarcocystis canis-like parasite associated with fatal hepatitis in polar bears (Ursus maritimus) |
author_facet |
Dubey, J. Rosenthal, Benjamin Sundar, Natarajan Velmurugan, G. Beckmen, Kimberlee |
author_sort |
Dubey, J. |
title |
Sarcocystis arctosi sp. nov. (Apicomplexa, Sarcocystidae) from the brown bear (Ursus arctos), and its genetic similarity to schizonts of Sarcocystis canis-like parasite associated with fatal hepatitis in polar bears (Ursus maritimus) |
title_short |
Sarcocystis arctosi sp. nov. (Apicomplexa, Sarcocystidae) from the brown bear (Ursus arctos), and its genetic similarity to schizonts of Sarcocystis canis-like parasite associated with fatal hepatitis in polar bears (Ursus maritimus) |
title_full |
Sarcocystis arctosi sp. nov. (Apicomplexa, Sarcocystidae) from the brown bear (Ursus arctos), and its genetic similarity to schizonts of Sarcocystis canis-like parasite associated with fatal hepatitis in polar bears (Ursus maritimus) |
title_fullStr |
Sarcocystis arctosi sp. nov. (Apicomplexa, Sarcocystidae) from the brown bear (Ursus arctos), and its genetic similarity to schizonts of Sarcocystis canis-like parasite associated with fatal hepatitis in polar bears (Ursus maritimus) |
title_full_unstemmed |
Sarcocystis arctosi sp. nov. (Apicomplexa, Sarcocystidae) from the brown bear (Ursus arctos), and its genetic similarity to schizonts of Sarcocystis canis-like parasite associated with fatal hepatitis in polar bears (Ursus maritimus) |
title_sort |
sarcocystis arctosi sp. nov. (apicomplexa, sarcocystidae) from the brown bear (ursus arctos), and its genetic similarity to schizonts of sarcocystis canis-like parasite associated with fatal hepatitis in polar bears (ursus maritimus) |
publisher |
Walter de Gruyter GmbH |
publishDate |
2007 |
url |
http://dx.doi.org/10.2478/s11686-007-0048-6 http://link.springer.com/content/pdf/10.2478/s11686-007-0048-6.pdf http://link.springer.com/article/10.2478/s11686-007-0048-6/fulltext.html http://link.springer.com/content/pdf/10.2478/s11686-007-0048-6 |
genre |
Ursus arctos Ursus maritimus Alaska |
genre_facet |
Ursus arctos Ursus maritimus Alaska |
op_source |
Acta Parasitologica volume 52, issue 4 ISSN 1896-1851 1230-2821 |
op_rights |
http://www.springer.com/tdm |
op_doi |
https://doi.org/10.2478/s11686-007-0048-6 |
container_title |
Acta Parasitologica |
container_volume |
52 |
container_issue |
4 |
_version_ |
1809947362891661312 |