Vectors and transmission dynamics for Setaria tundra (Filarioidea; Onchocercidae), a parasite of reindeer in Finland
Background: Recent studies have revealed expansion by an array of Filarioid nematodes' into the northern boreal region of Finland. The vector-borne nematode, Setaria tundra, caused a serious disease outbreak in the Finnish reindeer population in 2003–05. The main aim of this study was to unders...
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ftunivhelsihelda:oai:helda.helsinki.fi:10138/16991 2024-09-15T18:39:31+00:00 Vectors and transmission dynamics for Setaria tundra (Filarioidea; Onchocercidae), a parasite of reindeer in Finland Laaksonen, Sauli Solismaa, Milla Kortet, Raine Kuusela, Jussi Oksanen, Antti 2010-05-20T07:03:07Z application/pdf http://hdl.handle.net/10138/16991 eng eng BioMed Central https://doi.org/10.1186/1756-3305-2-3 http://hdl.handle.net/10138/16991 Artikkeli 2010 ftunivhelsihelda https://doi.org/10.1186/1756-3305-2-3 2024-07-04T04:52:38Z Background: Recent studies have revealed expansion by an array of Filarioid nematodes' into the northern boreal region of Finland. The vector-borne nematode, Setaria tundra, caused a serious disease outbreak in the Finnish reindeer population in 2003–05. The main aim of this study was to understand the outbreak dynamics and the rapid expansion of S. tundra in the sub arctic. We describe the vectors of S. tundra, and its development in vectors, for the first time. Finally we discuss the results in the context of the host-parasite ecology of S. tundra in Finland Results: Development of S. tundra to the infective stage occurs in mosquitoes, (genera Aedes and Anopheles). We consider Aedes spp. the most important vectors. The prevalence of S. tundra naturally infected mosquitoes from Finland varied from 0.5 to 2.5%. The rate of development in mosquitoes was temperature-dependent. Infective larvae were present approximately 14 days after a blood meal in mosquitoes maintained at room temperature (mean 21 C), but did not develop in mosquitoes maintained outside for 22 days at a mean temperature of 14.1 C. The third-stage (infective) larvae were elongated (mean length 1411 m (SD 207), and width 28 m (SD 2)). The anterior end was blunt, and bore two liplike structures, the posterior end slight tapering with a prominent terminal papilla. Infective larvae were distributed anteriorly in the insect's body, the highest abundance being 70 larvae in one mosquito. A questionnaire survey revealed that the peak activity of Culicidae in the reindeer herding areas of Finland was from the middle of June to the end of July and that warm summer weather was associated with reindeer flocking behaviour on mosquito-rich wetlands. Conclusion: In the present work, S. tundra vectors and larval development were identified and described for the first time. Aedes spp. mosquitoes likely serve as the most important and competent vectors for S. tundra in Finland. Warm summers apparently promote transmission and genesis of disease outbreaks by ... Article in Journal/Newspaper Tundra HELDA – University of Helsinki Open Repository Parasites & Vectors 2 1 3 |
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HELDA – University of Helsinki Open Repository |
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ftunivhelsihelda |
language |
English |
description |
Background: Recent studies have revealed expansion by an array of Filarioid nematodes' into the northern boreal region of Finland. The vector-borne nematode, Setaria tundra, caused a serious disease outbreak in the Finnish reindeer population in 2003–05. The main aim of this study was to understand the outbreak dynamics and the rapid expansion of S. tundra in the sub arctic. We describe the vectors of S. tundra, and its development in vectors, for the first time. Finally we discuss the results in the context of the host-parasite ecology of S. tundra in Finland Results: Development of S. tundra to the infective stage occurs in mosquitoes, (genera Aedes and Anopheles). We consider Aedes spp. the most important vectors. The prevalence of S. tundra naturally infected mosquitoes from Finland varied from 0.5 to 2.5%. The rate of development in mosquitoes was temperature-dependent. Infective larvae were present approximately 14 days after a blood meal in mosquitoes maintained at room temperature (mean 21 C), but did not develop in mosquitoes maintained outside for 22 days at a mean temperature of 14.1 C. The third-stage (infective) larvae were elongated (mean length 1411 m (SD 207), and width 28 m (SD 2)). The anterior end was blunt, and bore two liplike structures, the posterior end slight tapering with a prominent terminal papilla. Infective larvae were distributed anteriorly in the insect's body, the highest abundance being 70 larvae in one mosquito. A questionnaire survey revealed that the peak activity of Culicidae in the reindeer herding areas of Finland was from the middle of June to the end of July and that warm summer weather was associated with reindeer flocking behaviour on mosquito-rich wetlands. Conclusion: In the present work, S. tundra vectors and larval development were identified and described for the first time. Aedes spp. mosquitoes likely serve as the most important and competent vectors for S. tundra in Finland. Warm summers apparently promote transmission and genesis of disease outbreaks by ... |
format |
Article in Journal/Newspaper |
author |
Laaksonen, Sauli Solismaa, Milla Kortet, Raine Kuusela, Jussi Oksanen, Antti |
spellingShingle |
Laaksonen, Sauli Solismaa, Milla Kortet, Raine Kuusela, Jussi Oksanen, Antti Vectors and transmission dynamics for Setaria tundra (Filarioidea; Onchocercidae), a parasite of reindeer in Finland |
author_facet |
Laaksonen, Sauli Solismaa, Milla Kortet, Raine Kuusela, Jussi Oksanen, Antti |
author_sort |
Laaksonen, Sauli |
title |
Vectors and transmission dynamics for Setaria tundra (Filarioidea; Onchocercidae), a parasite of reindeer in Finland |
title_short |
Vectors and transmission dynamics for Setaria tundra (Filarioidea; Onchocercidae), a parasite of reindeer in Finland |
title_full |
Vectors and transmission dynamics for Setaria tundra (Filarioidea; Onchocercidae), a parasite of reindeer in Finland |
title_fullStr |
Vectors and transmission dynamics for Setaria tundra (Filarioidea; Onchocercidae), a parasite of reindeer in Finland |
title_full_unstemmed |
Vectors and transmission dynamics for Setaria tundra (Filarioidea; Onchocercidae), a parasite of reindeer in Finland |
title_sort |
vectors and transmission dynamics for setaria tundra (filarioidea; onchocercidae), a parasite of reindeer in finland |
publisher |
BioMed Central |
publishDate |
2010 |
url |
http://hdl.handle.net/10138/16991 |
genre |
Tundra |
genre_facet |
Tundra |
op_relation |
https://doi.org/10.1186/1756-3305-2-3 http://hdl.handle.net/10138/16991 |
op_doi |
https://doi.org/10.1186/1756-3305-2-3 |
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