The development and pathogenesis of Leucocytozoon simondi in Canada and domestic geese in Algonquin Park, Ontario
The development of Leucocytozoon simondi was studied in naturally and experimentally infected Branta canadensis maxima, Branta canadensis interior, and Anser domesticus. The number of mature round gametocytes in the peripheral blood of the Canada geese increased between days 9 and 15 post exposure (...
Published in: | Canadian Journal of Zoology |
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Language: | English |
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Canadian Science Publishing
1976
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Online Access: | http://dx.doi.org/10.1139/z76-075 http://www.nrcresearchpress.com/doi/pdf/10.1139/z76-075 |
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crcansciencepubl:10.1139/z76-075 2024-06-23T07:51:50+00:00 The development and pathogenesis of Leucocytozoon simondi in Canada and domestic geese in Algonquin Park, Ontario Desser, Sherwin S. Ryckman, Andrée K. 1976 http://dx.doi.org/10.1139/z76-075 http://www.nrcresearchpress.com/doi/pdf/10.1139/z76-075 en eng Canadian Science Publishing http://www.nrcresearchpress.com/page/about/CorporateTextAndDataMining Canadian Journal of Zoology volume 54, issue 5, page 634-643 ISSN 0008-4301 1480-3283 journal-article 1976 crcansciencepubl https://doi.org/10.1139/z76-075 2024-06-13T04:10:50Z The development of Leucocytozoon simondi was studied in naturally and experimentally infected Branta canadensis maxima, Branta canadensis interior, and Anser domesticus. The number of mature round gametocytes in the peripheral blood of the Canada geese increased between days 9 and 15 post exposure (PE) and decreased rapidly thereafter. Mean peak parasitemias recorded on day 13 PE were (per 1000 red blood cells (RBC)): 8 gametocytes in B.c. maxima, 16 gametocytes in B.c. interior, and 17 gametocytes in A. domesticus. About 3 weeks PE, gametocytes disappeared from the peripheral circulation and were not observed again during the autumn, winter, and spring in birds kept in the laboratory.Haematocrit determinations in the Canada geese revealed a low fluctuating anemia during the primary infection which subsided by day 21 PE. A more severe anemia was recorded in A. domesticus with a mean low packed RBC value of about 18% on day 11 PE. Immature and mature hepatic schizonts were observed in the Canada and domestic geese between days 3 and 8 PE. Neither megaloschizonts nor elongate gametocytes were seen. Clinical signs, pathology, and mortality commonly associated with L. simondi infection in ducks were not observed. Hypotheses are advanced to explain reports of severe pathogenesis associated with L. simondi infections in Canada geese in other localities. Article in Journal/Newspaper Branta canadensis Canadian Science Publishing Canada Canadian Journal of Zoology 54 5 634 643 |
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Open Polar |
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Canadian Science Publishing |
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crcansciencepubl |
language |
English |
description |
The development of Leucocytozoon simondi was studied in naturally and experimentally infected Branta canadensis maxima, Branta canadensis interior, and Anser domesticus. The number of mature round gametocytes in the peripheral blood of the Canada geese increased between days 9 and 15 post exposure (PE) and decreased rapidly thereafter. Mean peak parasitemias recorded on day 13 PE were (per 1000 red blood cells (RBC)): 8 gametocytes in B.c. maxima, 16 gametocytes in B.c. interior, and 17 gametocytes in A. domesticus. About 3 weeks PE, gametocytes disappeared from the peripheral circulation and were not observed again during the autumn, winter, and spring in birds kept in the laboratory.Haematocrit determinations in the Canada geese revealed a low fluctuating anemia during the primary infection which subsided by day 21 PE. A more severe anemia was recorded in A. domesticus with a mean low packed RBC value of about 18% on day 11 PE. Immature and mature hepatic schizonts were observed in the Canada and domestic geese between days 3 and 8 PE. Neither megaloschizonts nor elongate gametocytes were seen. Clinical signs, pathology, and mortality commonly associated with L. simondi infection in ducks were not observed. Hypotheses are advanced to explain reports of severe pathogenesis associated with L. simondi infections in Canada geese in other localities. |
format |
Article in Journal/Newspaper |
author |
Desser, Sherwin S. Ryckman, Andrée K. |
spellingShingle |
Desser, Sherwin S. Ryckman, Andrée K. The development and pathogenesis of Leucocytozoon simondi in Canada and domestic geese in Algonquin Park, Ontario |
author_facet |
Desser, Sherwin S. Ryckman, Andrée K. |
author_sort |
Desser, Sherwin S. |
title |
The development and pathogenesis of Leucocytozoon simondi in Canada and domestic geese in Algonquin Park, Ontario |
title_short |
The development and pathogenesis of Leucocytozoon simondi in Canada and domestic geese in Algonquin Park, Ontario |
title_full |
The development and pathogenesis of Leucocytozoon simondi in Canada and domestic geese in Algonquin Park, Ontario |
title_fullStr |
The development and pathogenesis of Leucocytozoon simondi in Canada and domestic geese in Algonquin Park, Ontario |
title_full_unstemmed |
The development and pathogenesis of Leucocytozoon simondi in Canada and domestic geese in Algonquin Park, Ontario |
title_sort |
development and pathogenesis of leucocytozoon simondi in canada and domestic geese in algonquin park, ontario |
publisher |
Canadian Science Publishing |
publishDate |
1976 |
url |
http://dx.doi.org/10.1139/z76-075 http://www.nrcresearchpress.com/doi/pdf/10.1139/z76-075 |
geographic |
Canada |
geographic_facet |
Canada |
genre |
Branta canadensis |
genre_facet |
Branta canadensis |
op_source |
Canadian Journal of Zoology volume 54, issue 5, page 634-643 ISSN 0008-4301 1480-3283 |
op_rights |
http://www.nrcresearchpress.com/page/about/CorporateTextAndDataMining |
op_doi |
https://doi.org/10.1139/z76-075 |
container_title |
Canadian Journal of Zoology |
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54 |
container_issue |
5 |
container_start_page |
634 |
op_container_end_page |
643 |
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1802642980542087168 |