The annual, temporal and spatial pattern of Setaria tundra outbreaks in Finnish reindeer: a mechanistic transmission model approach
Abstract Background In northern Finland (Lapland), reindeer are reared as semi-domesticated animals. The region has a short summer season of 2–3 months, yet reindeer are infected with the mosquito-borne filarioid parasite Setaria tundra. The infection causes peritonitis and perihepatitis, which caus...
Published in: | Parasites & Vectors |
---|---|
Main Authors: | , , , , |
Format: | Article in Journal/Newspaper |
Language: | English |
Published: |
BMC
2018
|
Subjects: | |
Online Access: | https://doi.org/10.1186/s13071-018-3159-z https://doaj.org/article/1f99fee5a5c24ba69a94297b3a491e2b |
id |
ftdoajarticles:oai:doaj.org/article:1f99fee5a5c24ba69a94297b3a491e2b |
---|---|
record_format |
openpolar |
spelling |
ftdoajarticles:oai:doaj.org/article:1f99fee5a5c24ba69a94297b3a491e2b 2023-05-15T17:42:54+02:00 The annual, temporal and spatial pattern of Setaria tundra outbreaks in Finnish reindeer: a mechanistic transmission model approach Najmul Haider Sauli Laaksonen Lene Jung Kjær Antti Oksanen Rene Bødker 2018-11-01T00:00:00Z https://doi.org/10.1186/s13071-018-3159-z https://doaj.org/article/1f99fee5a5c24ba69a94297b3a491e2b EN eng BMC http://link.springer.com/article/10.1186/s13071-018-3159-z https://doaj.org/toc/1756-3305 doi:10.1186/s13071-018-3159-z 1756-3305 https://doaj.org/article/1f99fee5a5c24ba69a94297b3a491e2b Parasites & Vectors, Vol 11, Iss 1, Pp 1-13 (2018) Setaria tundra Spatio-temporal distribution Disease outbreak Reindeer Finland Microclimatic temperature Infectious and parasitic diseases RC109-216 article 2018 ftdoajarticles https://doi.org/10.1186/s13071-018-3159-z 2022-12-31T04:40:31Z Abstract Background In northern Finland (Lapland), reindeer are reared as semi-domesticated animals. The region has a short summer season of 2–3 months, yet reindeer are infected with the mosquito-borne filarioid parasite Setaria tundra. The infection causes peritonitis and perihepatitis, which cause significant economic losses due to reduced body weight of infected animals. The objective of this study was to: (i) describe the spatial and temporal pattern of outbreaks in three different areas across Finnish Lapland; and (ii) construct a temperature-driven mechanistic transmission model to quantify the potential role of temperature on intensity of S. tundra transmission in reindeer. Methods We developed a temperature-driven transmission model able to predict the number of S. tundra potentially transmitted from an infectious reindeer. We applied the model to the years 2004–2015, and compared the predictions to the proportion of reindeer whose livers were condemned due to S. tundra infection at the time of slaughter. Results The mean proportion of liver condemnation increased in reindeer slaughtered in late autumn/winter compared to earlier dates. The outbreaks were geographically clustered each year but there were no fixed foci where outbreaks occurred. Larger outbreaks were recorded in the southern regions of reindeer-herding areas compared to the central or northern parts of Lapland. Our model showed that temperatures never allowed for transmission of more than a single generation of S. tundra each season. In southern (Kuusamo) and central (Sodankylä) Lapland, our model predicted an increasing trend from 1979 to 2015 for both the duration of the effective transmission period of S. tundra (P < 0.001) and for the potential number of L3 S. tundra larvae being transmitted from an infectious reindeer (P < 0.001). Conclusions The effective transmission period for S. tundra in reindeer is very short in Lapland, but it increased over the period studied. Only one generation of S. tundra can be transmitted in one ... Article in Journal/Newspaper Northern Finland Sodankylä Tundra Lapland Directory of Open Access Journals: DOAJ Articles Sodankylä ENVELOPE(26.600,26.600,67.417,67.417) Slaughter ENVELOPE(-85.633,-85.633,-78.617,-78.617) Kuusamo ENVELOPE(29.183,29.183,65.967,65.967) Parasites & Vectors 11 1 |
institution |
Open Polar |
collection |
Directory of Open Access Journals: DOAJ Articles |
op_collection_id |
ftdoajarticles |
language |
English |
topic |
Setaria tundra Spatio-temporal distribution Disease outbreak Reindeer Finland Microclimatic temperature Infectious and parasitic diseases RC109-216 |
spellingShingle |
Setaria tundra Spatio-temporal distribution Disease outbreak Reindeer Finland Microclimatic temperature Infectious and parasitic diseases RC109-216 Najmul Haider Sauli Laaksonen Lene Jung Kjær Antti Oksanen Rene Bødker The annual, temporal and spatial pattern of Setaria tundra outbreaks in Finnish reindeer: a mechanistic transmission model approach |
topic_facet |
Setaria tundra Spatio-temporal distribution Disease outbreak Reindeer Finland Microclimatic temperature Infectious and parasitic diseases RC109-216 |
description |
Abstract Background In northern Finland (Lapland), reindeer are reared as semi-domesticated animals. The region has a short summer season of 2–3 months, yet reindeer are infected with the mosquito-borne filarioid parasite Setaria tundra. The infection causes peritonitis and perihepatitis, which cause significant economic losses due to reduced body weight of infected animals. The objective of this study was to: (i) describe the spatial and temporal pattern of outbreaks in three different areas across Finnish Lapland; and (ii) construct a temperature-driven mechanistic transmission model to quantify the potential role of temperature on intensity of S. tundra transmission in reindeer. Methods We developed a temperature-driven transmission model able to predict the number of S. tundra potentially transmitted from an infectious reindeer. We applied the model to the years 2004–2015, and compared the predictions to the proportion of reindeer whose livers were condemned due to S. tundra infection at the time of slaughter. Results The mean proportion of liver condemnation increased in reindeer slaughtered in late autumn/winter compared to earlier dates. The outbreaks were geographically clustered each year but there were no fixed foci where outbreaks occurred. Larger outbreaks were recorded in the southern regions of reindeer-herding areas compared to the central or northern parts of Lapland. Our model showed that temperatures never allowed for transmission of more than a single generation of S. tundra each season. In southern (Kuusamo) and central (Sodankylä) Lapland, our model predicted an increasing trend from 1979 to 2015 for both the duration of the effective transmission period of S. tundra (P < 0.001) and for the potential number of L3 S. tundra larvae being transmitted from an infectious reindeer (P < 0.001). Conclusions The effective transmission period for S. tundra in reindeer is very short in Lapland, but it increased over the period studied. Only one generation of S. tundra can be transmitted in one ... |
format |
Article in Journal/Newspaper |
author |
Najmul Haider Sauli Laaksonen Lene Jung Kjær Antti Oksanen Rene Bødker |
author_facet |
Najmul Haider Sauli Laaksonen Lene Jung Kjær Antti Oksanen Rene Bødker |
author_sort |
Najmul Haider |
title |
The annual, temporal and spatial pattern of Setaria tundra outbreaks in Finnish reindeer: a mechanistic transmission model approach |
title_short |
The annual, temporal and spatial pattern of Setaria tundra outbreaks in Finnish reindeer: a mechanistic transmission model approach |
title_full |
The annual, temporal and spatial pattern of Setaria tundra outbreaks in Finnish reindeer: a mechanistic transmission model approach |
title_fullStr |
The annual, temporal and spatial pattern of Setaria tundra outbreaks in Finnish reindeer: a mechanistic transmission model approach |
title_full_unstemmed |
The annual, temporal and spatial pattern of Setaria tundra outbreaks in Finnish reindeer: a mechanistic transmission model approach |
title_sort |
annual, temporal and spatial pattern of setaria tundra outbreaks in finnish reindeer: a mechanistic transmission model approach |
publisher |
BMC |
publishDate |
2018 |
url |
https://doi.org/10.1186/s13071-018-3159-z https://doaj.org/article/1f99fee5a5c24ba69a94297b3a491e2b |
long_lat |
ENVELOPE(26.600,26.600,67.417,67.417) ENVELOPE(-85.633,-85.633,-78.617,-78.617) ENVELOPE(29.183,29.183,65.967,65.967) |
geographic |
Sodankylä Slaughter Kuusamo |
geographic_facet |
Sodankylä Slaughter Kuusamo |
genre |
Northern Finland Sodankylä Tundra Lapland |
genre_facet |
Northern Finland Sodankylä Tundra Lapland |
op_source |
Parasites & Vectors, Vol 11, Iss 1, Pp 1-13 (2018) |
op_relation |
http://link.springer.com/article/10.1186/s13071-018-3159-z https://doaj.org/toc/1756-3305 doi:10.1186/s13071-018-3159-z 1756-3305 https://doaj.org/article/1f99fee5a5c24ba69a94297b3a491e2b |
op_doi |
https://doi.org/10.1186/s13071-018-3159-z |
container_title |
Parasites & Vectors |
container_volume |
11 |
container_issue |
1 |
_version_ |
1766144825641402368 |