Description of Sarcocystis rauschorum sp. n. (Protozoa: Sarcocystidae) with experimental cyclic transmission between varying lemmings ( Dicrostonyx richardsoni ) and snowy owls ( Nyctea scandiaca )
Sarcocystis rauschorum sp. n. (Protozoa: Sarcocystidae) is heteroxenous, with varying lemmings (Dicrostonyx richardsoni) as expermental intermediate hosts and snowy owls (Nyctea scandiaca) as natural and experimental definitive hosts. Free sporocysts of a Sarcocystis-like organism (11.6 × 9.2 μm wit...
Published in: | Canadian Journal of Zoology |
---|---|
Main Authors: | , , |
Format: | Article in Journal/Newspaper |
Language: | English |
Published: |
Canadian Science Publishing
1984
|
Subjects: | |
Online Access: | http://dx.doi.org/10.1139/z84-036 http://www.nrcresearchpress.com/doi/pdf/10.1139/z84-036 |
id |
crcansciencepubl:10.1139/z84-036 |
---|---|
record_format |
openpolar |
spelling |
crcansciencepubl:10.1139/z84-036 2023-12-17T10:29:24+01:00 Description of Sarcocystis rauschorum sp. n. (Protozoa: Sarcocystidae) with experimental cyclic transmission between varying lemmings ( Dicrostonyx richardsoni ) and snowy owls ( Nyctea scandiaca ) Cawthorn, Richard J. Gajadhar, Alvin A. Brooks, Ronald J. 1984 http://dx.doi.org/10.1139/z84-036 http://www.nrcresearchpress.com/doi/pdf/10.1139/z84-036 en eng Canadian Science Publishing http://www.nrcresearchpress.com/page/about/CorporateTextAndDataMining Canadian Journal of Zoology volume 62, issue 2, page 217-225 ISSN 0008-4301 1480-3283 Animal Science and Zoology Ecology, Evolution, Behavior and Systematics journal-article 1984 crcansciencepubl https://doi.org/10.1139/z84-036 2023-11-19T13:38:46Z Sarcocystis rauschorum sp. n. (Protozoa: Sarcocystidae) is heteroxenous, with varying lemmings (Dicrostonyx richardsoni) as expermental intermediate hosts and snowy owls (Nyctea scandiaca) as natural and experimental definitive hosts. Free sporocysts of a Sarcocystis-like organism (11.6 × 9.2 μm with a diffuse residuum of numerous small refractile granules) from intestinal scrapings of a naturally infected snowy owl were orally administered to laboratory-reared varying lemmings. Meronts were present 7 days post inoculation (DPI) in hepatocytes. Cysts of S. rauschorum sp. n. developed in striated muscle and contained metrocytes (4.6 × 3.8 μm) 14 DPI; bradyzoites (6 × 2 μm) were present at least as early as 28 DPI. Cysts at 84 DPI were not macroscopic (greatest diameter 80.9 μm, least diameter 70.9 μm) with walls 0.35–0.70 μm thick. Laboratory-reared rats (Rattus norvegicus), house mice (Mus musculus), white-footed mice (Peromyscus leucopus), red-backed voles (Clethrionomys gapped), and brown lemmings (Lemmus sibiricus) were not suitable intermediate hosts. Carcasses of varying lemmings containing cysts (57 and 84 DPI) of S. rauschorum sp. n. were fed to three Sarcocystis-free snowy owls. The prepatent period was 7 days and the patent period 12 – 19 days. Sporogony occurred in the lamina propria throughout the length of the small intestine. Free sporocysts (10.4 × 8.2 μm with a compact residuum of numerous small refractile granules) from experimentally infected owls were infective for varying lemmings. Article in Journal/Newspaper Dicrostonyx richardsoni Lemmus sibiricus Nyctea scandiaca snowy owl Canadian Science Publishing (via Crossref) Canadian Journal of Zoology 62 2 217 225 |
institution |
Open Polar |
collection |
Canadian Science Publishing (via Crossref) |
op_collection_id |
crcansciencepubl |
language |
English |
topic |
Animal Science and Zoology Ecology, Evolution, Behavior and Systematics |
spellingShingle |
Animal Science and Zoology Ecology, Evolution, Behavior and Systematics Cawthorn, Richard J. Gajadhar, Alvin A. Brooks, Ronald J. Description of Sarcocystis rauschorum sp. n. (Protozoa: Sarcocystidae) with experimental cyclic transmission between varying lemmings ( Dicrostonyx richardsoni ) and snowy owls ( Nyctea scandiaca ) |
topic_facet |
Animal Science and Zoology Ecology, Evolution, Behavior and Systematics |
description |
Sarcocystis rauschorum sp. n. (Protozoa: Sarcocystidae) is heteroxenous, with varying lemmings (Dicrostonyx richardsoni) as expermental intermediate hosts and snowy owls (Nyctea scandiaca) as natural and experimental definitive hosts. Free sporocysts of a Sarcocystis-like organism (11.6 × 9.2 μm with a diffuse residuum of numerous small refractile granules) from intestinal scrapings of a naturally infected snowy owl were orally administered to laboratory-reared varying lemmings. Meronts were present 7 days post inoculation (DPI) in hepatocytes. Cysts of S. rauschorum sp. n. developed in striated muscle and contained metrocytes (4.6 × 3.8 μm) 14 DPI; bradyzoites (6 × 2 μm) were present at least as early as 28 DPI. Cysts at 84 DPI were not macroscopic (greatest diameter 80.9 μm, least diameter 70.9 μm) with walls 0.35–0.70 μm thick. Laboratory-reared rats (Rattus norvegicus), house mice (Mus musculus), white-footed mice (Peromyscus leucopus), red-backed voles (Clethrionomys gapped), and brown lemmings (Lemmus sibiricus) were not suitable intermediate hosts. Carcasses of varying lemmings containing cysts (57 and 84 DPI) of S. rauschorum sp. n. were fed to three Sarcocystis-free snowy owls. The prepatent period was 7 days and the patent period 12 – 19 days. Sporogony occurred in the lamina propria throughout the length of the small intestine. Free sporocysts (10.4 × 8.2 μm with a compact residuum of numerous small refractile granules) from experimentally infected owls were infective for varying lemmings. |
format |
Article in Journal/Newspaper |
author |
Cawthorn, Richard J. Gajadhar, Alvin A. Brooks, Ronald J. |
author_facet |
Cawthorn, Richard J. Gajadhar, Alvin A. Brooks, Ronald J. |
author_sort |
Cawthorn, Richard J. |
title |
Description of Sarcocystis rauschorum sp. n. (Protozoa: Sarcocystidae) with experimental cyclic transmission between varying lemmings ( Dicrostonyx richardsoni ) and snowy owls ( Nyctea scandiaca ) |
title_short |
Description of Sarcocystis rauschorum sp. n. (Protozoa: Sarcocystidae) with experimental cyclic transmission between varying lemmings ( Dicrostonyx richardsoni ) and snowy owls ( Nyctea scandiaca ) |
title_full |
Description of Sarcocystis rauschorum sp. n. (Protozoa: Sarcocystidae) with experimental cyclic transmission between varying lemmings ( Dicrostonyx richardsoni ) and snowy owls ( Nyctea scandiaca ) |
title_fullStr |
Description of Sarcocystis rauschorum sp. n. (Protozoa: Sarcocystidae) with experimental cyclic transmission between varying lemmings ( Dicrostonyx richardsoni ) and snowy owls ( Nyctea scandiaca ) |
title_full_unstemmed |
Description of Sarcocystis rauschorum sp. n. (Protozoa: Sarcocystidae) with experimental cyclic transmission between varying lemmings ( Dicrostonyx richardsoni ) and snowy owls ( Nyctea scandiaca ) |
title_sort |
description of sarcocystis rauschorum sp. n. (protozoa: sarcocystidae) with experimental cyclic transmission between varying lemmings ( dicrostonyx richardsoni ) and snowy owls ( nyctea scandiaca ) |
publisher |
Canadian Science Publishing |
publishDate |
1984 |
url |
http://dx.doi.org/10.1139/z84-036 http://www.nrcresearchpress.com/doi/pdf/10.1139/z84-036 |
genre |
Dicrostonyx richardsoni Lemmus sibiricus Nyctea scandiaca snowy owl |
genre_facet |
Dicrostonyx richardsoni Lemmus sibiricus Nyctea scandiaca snowy owl |
op_source |
Canadian Journal of Zoology volume 62, issue 2, page 217-225 ISSN 0008-4301 1480-3283 |
op_rights |
http://www.nrcresearchpress.com/page/about/CorporateTextAndDataMining |
op_doi |
https://doi.org/10.1139/z84-036 |
container_title |
Canadian Journal of Zoology |
container_volume |
62 |
container_issue |
2 |
container_start_page |
217 |
op_container_end_page |
225 |
_version_ |
1785581777332469760 |