Experimental Spironucleus infections in Atlantic salmon (Salmo salar) : Hidden secrets of the life cycle of Spironucleus salmonicida revealed
We have performed experimental infections of Atlantic salmon (Salmo salar) from the Baltic Sea region with the protozoan parasite Spironucleus salmonicida. By this infection trial we have been able to show that the life cycle may use an alternative route of transmission. Instead of the commonly used...
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Uppsala universitet, Institutionen för biologisk grundutbildning
2018
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ftuppsalauniv:oai:DiVA.org:uu-357313 2024-01-28T10:04:30+01:00 Experimental Spironucleus infections in Atlantic salmon (Salmo salar) : Hidden secrets of the life cycle of Spironucleus salmonicida revealed Alfjorden, Anders 2018 application/pdf http://urn.kb.se/resolve?urn=urn:nbn:se:uu:diva-357313 eng eng Uppsala universitet, Institutionen för biologisk grundutbildning http://urn.kb.se/resolve?urn=urn:nbn:se:uu:diva-357313 info:eu-repo/semantics/openAccess Parasite Salmon Infection Diplomonada Spironucleus Other Biological Topics Annan biologi Student thesis info:eu-repo/semantics/bachelorThesis text 2018 ftuppsalauniv 2024-01-03T23:31:55Z We have performed experimental infections of Atlantic salmon (Salmo salar) from the Baltic Sea region with the protozoan parasite Spironucleus salmonicida. By this infection trial we have been able to show that the life cycle may use an alternative route of transmission. Instead of the commonly used faecal-oral route, the parasites can also be excreted directly into the surrounding water from the mucous layer of the skin or from an ulcerated skin lesion. Three different stages of the infection were identified: one intestinal, one blood stage and one tissue stage. New putative life-cycle forms of S. salmonicida cells detected by ex-vivo cell-cultures. Similar cells were also observed in imprints from skin lesions sampled during the experimental infection trials. The cells differed morphologically, from normal trophozoite cells and indicate an alternative cell-cycle when exposed to salmonid host cells. Bachelor Thesis Atlantic salmon Salmo salar Uppsala University: Publications (DiVA) |
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Uppsala University: Publications (DiVA) |
op_collection_id |
ftuppsalauniv |
language |
English |
topic |
Parasite Salmon Infection Diplomonada Spironucleus Other Biological Topics Annan biologi |
spellingShingle |
Parasite Salmon Infection Diplomonada Spironucleus Other Biological Topics Annan biologi Alfjorden, Anders Experimental Spironucleus infections in Atlantic salmon (Salmo salar) : Hidden secrets of the life cycle of Spironucleus salmonicida revealed |
topic_facet |
Parasite Salmon Infection Diplomonada Spironucleus Other Biological Topics Annan biologi |
description |
We have performed experimental infections of Atlantic salmon (Salmo salar) from the Baltic Sea region with the protozoan parasite Spironucleus salmonicida. By this infection trial we have been able to show that the life cycle may use an alternative route of transmission. Instead of the commonly used faecal-oral route, the parasites can also be excreted directly into the surrounding water from the mucous layer of the skin or from an ulcerated skin lesion. Three different stages of the infection were identified: one intestinal, one blood stage and one tissue stage. New putative life-cycle forms of S. salmonicida cells detected by ex-vivo cell-cultures. Similar cells were also observed in imprints from skin lesions sampled during the experimental infection trials. The cells differed morphologically, from normal trophozoite cells and indicate an alternative cell-cycle when exposed to salmonid host cells. |
format |
Bachelor Thesis |
author |
Alfjorden, Anders |
author_facet |
Alfjorden, Anders |
author_sort |
Alfjorden, Anders |
title |
Experimental Spironucleus infections in Atlantic salmon (Salmo salar) : Hidden secrets of the life cycle of Spironucleus salmonicida revealed |
title_short |
Experimental Spironucleus infections in Atlantic salmon (Salmo salar) : Hidden secrets of the life cycle of Spironucleus salmonicida revealed |
title_full |
Experimental Spironucleus infections in Atlantic salmon (Salmo salar) : Hidden secrets of the life cycle of Spironucleus salmonicida revealed |
title_fullStr |
Experimental Spironucleus infections in Atlantic salmon (Salmo salar) : Hidden secrets of the life cycle of Spironucleus salmonicida revealed |
title_full_unstemmed |
Experimental Spironucleus infections in Atlantic salmon (Salmo salar) : Hidden secrets of the life cycle of Spironucleus salmonicida revealed |
title_sort |
experimental spironucleus infections in atlantic salmon (salmo salar) : hidden secrets of the life cycle of spironucleus salmonicida revealed |
publisher |
Uppsala universitet, Institutionen för biologisk grundutbildning |
publishDate |
2018 |
url |
http://urn.kb.se/resolve?urn=urn:nbn:se:uu:diva-357313 |
genre |
Atlantic salmon Salmo salar |
genre_facet |
Atlantic salmon Salmo salar |
op_relation |
http://urn.kb.se/resolve?urn=urn:nbn:se:uu:diva-357313 |
op_rights |
info:eu-repo/semantics/openAccess |
_version_ |
1789330222061977600 |