Blood Changes in Atlantic Cod ( Gadus morhua ) Infected with Trypanosoma murmanensis
Blood samples for hematological and parasitological studies were obtained from 30 Atlantic cod (Gadus morhua) at intervals after infection with Trypanosoma murmanensis via leeches. Hematological procedures included estimation of hematocrit, hemoglobin, erythrocyte sedimentation rate (ESR), and diffe...
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Canadian Science Publishing
1977
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Online Access: | http://dx.doi.org/10.1139/f77-287 http://www.nrcresearchpress.com/doi/pdf/10.1139/f77-287 |
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crcansciencepubl:10.1139/f77-287 2023-12-17T10:26:58+01:00 Blood Changes in Atlantic Cod ( Gadus morhua ) Infected with Trypanosoma murmanensis Khan, R. A. 1977 http://dx.doi.org/10.1139/f77-287 http://www.nrcresearchpress.com/doi/pdf/10.1139/f77-287 en eng Canadian Science Publishing http://www.nrcresearchpress.com/page/about/CorporateTextAndDataMining Journal of the Fisheries Research Board of Canada volume 34, issue 11, page 2185-2192 ISSN 0015-296X General Medicine journal-article 1977 crcansciencepubl https://doi.org/10.1139/f77-287 2023-11-19T13:38:35Z Blood samples for hematological and parasitological studies were obtained from 30 Atlantic cod (Gadus morhua) at intervals after infection with Trypanosoma murmanensis via leeches. Hematological procedures included estimation of hematocrit, hemoglobin, erythrocyte sedimentation rate (ESR), and differential white cell count. Tissues were also examined for histological changes. Results from the cod could be divided into two groups. In the first group of 10 cod (16–24 cm), coincident with the rise in parasitemia, hematocrit and hemoglobin levels decreased and the ESR increased following infection. Values did not return to normal levels by 92 days postinfection despite decreasing and somewhat irregular fluctuating parasitemias after 29 days. There was no apparent change in the differential white cell count. Increased hemopoiesis occurred in the kidney and various developmental stages of erythrocytic precursors were noted in peripheral blood. The fish appeared somewhat lethargic. In the second group of 20 cod (26–49 cm), hematological changes observed were slight and there was no evidence of decreased mobility. These results suggest that the blood changes observed in the group of small cod are sufficient to affect them similarly under natural conditions so that they could become more prone to predators, pollutants, or diseases. Key words: blood changes, Atlantic cod, trypanosomes Article in Journal/Newspaper atlantic cod Gadus morhua Canadian Science Publishing (via Crossref) Journal of the Fisheries Research Board of Canada 34 11 2185 2192 |
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Canadian Science Publishing (via Crossref) |
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English |
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General Medicine |
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General Medicine Khan, R. A. Blood Changes in Atlantic Cod ( Gadus morhua ) Infected with Trypanosoma murmanensis |
topic_facet |
General Medicine |
description |
Blood samples for hematological and parasitological studies were obtained from 30 Atlantic cod (Gadus morhua) at intervals after infection with Trypanosoma murmanensis via leeches. Hematological procedures included estimation of hematocrit, hemoglobin, erythrocyte sedimentation rate (ESR), and differential white cell count. Tissues were also examined for histological changes. Results from the cod could be divided into two groups. In the first group of 10 cod (16–24 cm), coincident with the rise in parasitemia, hematocrit and hemoglobin levels decreased and the ESR increased following infection. Values did not return to normal levels by 92 days postinfection despite decreasing and somewhat irregular fluctuating parasitemias after 29 days. There was no apparent change in the differential white cell count. Increased hemopoiesis occurred in the kidney and various developmental stages of erythrocytic precursors were noted in peripheral blood. The fish appeared somewhat lethargic. In the second group of 20 cod (26–49 cm), hematological changes observed were slight and there was no evidence of decreased mobility. These results suggest that the blood changes observed in the group of small cod are sufficient to affect them similarly under natural conditions so that they could become more prone to predators, pollutants, or diseases. Key words: blood changes, Atlantic cod, trypanosomes |
format |
Article in Journal/Newspaper |
author |
Khan, R. A. |
author_facet |
Khan, R. A. |
author_sort |
Khan, R. A. |
title |
Blood Changes in Atlantic Cod ( Gadus morhua ) Infected with Trypanosoma murmanensis |
title_short |
Blood Changes in Atlantic Cod ( Gadus morhua ) Infected with Trypanosoma murmanensis |
title_full |
Blood Changes in Atlantic Cod ( Gadus morhua ) Infected with Trypanosoma murmanensis |
title_fullStr |
Blood Changes in Atlantic Cod ( Gadus morhua ) Infected with Trypanosoma murmanensis |
title_full_unstemmed |
Blood Changes in Atlantic Cod ( Gadus morhua ) Infected with Trypanosoma murmanensis |
title_sort |
blood changes in atlantic cod ( gadus morhua ) infected with trypanosoma murmanensis |
publisher |
Canadian Science Publishing |
publishDate |
1977 |
url |
http://dx.doi.org/10.1139/f77-287 http://www.nrcresearchpress.com/doi/pdf/10.1139/f77-287 |
genre |
atlantic cod Gadus morhua |
genre_facet |
atlantic cod Gadus morhua |
op_source |
Journal of the Fisheries Research Board of Canada volume 34, issue 11, page 2185-2192 ISSN 0015-296X |
op_rights |
http://www.nrcresearchpress.com/page/about/CorporateTextAndDataMining |
op_doi |
https://doi.org/10.1139/f77-287 |
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Journal of the Fisheries Research Board of Canada |
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34 |
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11 |
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2185 |
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