Mathematical modelling of the impact of climatic conditions in France on Rhipicephalus sanguineus tick activity and density since 1960
<em>Rhipicephalus sanguineus</em>, the brown dog tick, has a worldwide distribution in areas with a relatively warm climate, including mild winters. This tick plays an important role as vector for various animal and human pathogens, including bacteria and protozoa. Based on precise daily...
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| Format: | Article |
| Language: | English |
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PAGEPress Publications
2011-05-01
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| Series: | Geospatial Health |
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| Online Access: | http://www.geospatialhealth.net/index.php/gh/article/view/178 |
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| author | Frédéric Beugnet Michel Kolasinski Paul-Antoine Michelangeli Julien Vienne Harilaos Loukos |
| author_facet | Frédéric Beugnet Michel Kolasinski Paul-Antoine Michelangeli Julien Vienne Harilaos Loukos |
| author_sort | Frédéric Beugnet |
| collection | DOAJ |
| description | <em>Rhipicephalus sanguineus</em>, the brown dog tick, has a worldwide distribution in areas with a relatively warm climate, including mild winters. This tick plays an important role as vector for various animal and human pathogens, including bacteria and protozoa. Based on precise daily meteorological data from the past 40 years, combined with mathematical modelling designed to predict tick activity, two modelling approaches were developed. The first examined the evolution of the number of weeks with favourable biological conditions for ticks in four French cities located at various latitudes of the country: Nîmes in the south, Paris in the north, Lyon in the east and Nantes in the west. The second analysed the extension of the geographical surface area in km2 where the biological conditions favour tick activity for at least 12 weeks per year. Both analyses revealed clear evidence of increased temperatures coupled with an augmented tick activity index in three of the four cities. However, the change was not significant in Nîmes, where the climate is Mediterranean and the tick is already endemic. For Paris, Lyon and Nantes, the activity index values have increased significantly, i.e. by 4.4%, 4.0% and 3.4%, respectively. The distribution of the activity index values is evolving strongly with significantly fewer values below 50% since the 1960s and a clear decrease of values between 20% and 50% during the latest decade. Between 1960 and 2000, the theoretical extension of the surface area where the climatic index is suitable for <em>R. sanguineus</em> has increased by 66%. Even though several other important factors, such as changes in biotopes or human activity, are not included in this study, the resulting patterns and trends are noticeable. Our models constitute the first demonstration of the impact of climate change on the activity and distribution of ticks and confirm the observed northward migration trend for this Mediterranean domestic tick. |
| first_indexed | 2024-12-13T06:47:25Z |
| format | Article |
| id | doaj.art-8d3b0e0018424282af1b9c140c2ed978 |
| institution | Directory Open Access Journal |
| issn | 1827-1987 1970-7096 |
| language | English |
| last_indexed | 2024-12-13T06:47:25Z |
| publishDate | 2011-05-01 |
| publisher | PAGEPress Publications |
| record_format | Article |
| series | Geospatial Health |
| spelling | doaj.art-8d3b0e0018424282af1b9c140c2ed9782022-12-21T23:56:14ZengPAGEPress PublicationsGeospatial Health1827-19871970-70962011-05-015225526310.4081/gh.2011.178178Mathematical modelling of the impact of climatic conditions in France on Rhipicephalus sanguineus tick activity and density since 1960Frédéric Beugnet0Michel Kolasinski1Paul-Antoine Michelangeli2Julien Vienne3Harilaos Loukos4Merial, LyonCLIMPACT, ParisCLIMPACT, ParisCLIMPACT, ParisCLIMPACT, Paris<em>Rhipicephalus sanguineus</em>, the brown dog tick, has a worldwide distribution in areas with a relatively warm climate, including mild winters. This tick plays an important role as vector for various animal and human pathogens, including bacteria and protozoa. Based on precise daily meteorological data from the past 40 years, combined with mathematical modelling designed to predict tick activity, two modelling approaches were developed. The first examined the evolution of the number of weeks with favourable biological conditions for ticks in four French cities located at various latitudes of the country: Nîmes in the south, Paris in the north, Lyon in the east and Nantes in the west. The second analysed the extension of the geographical surface area in km2 where the biological conditions favour tick activity for at least 12 weeks per year. Both analyses revealed clear evidence of increased temperatures coupled with an augmented tick activity index in three of the four cities. However, the change was not significant in Nîmes, where the climate is Mediterranean and the tick is already endemic. For Paris, Lyon and Nantes, the activity index values have increased significantly, i.e. by 4.4%, 4.0% and 3.4%, respectively. The distribution of the activity index values is evolving strongly with significantly fewer values below 50% since the 1960s and a clear decrease of values between 20% and 50% during the latest decade. Between 1960 and 2000, the theoretical extension of the surface area where the climatic index is suitable for <em>R. sanguineus</em> has increased by 66%. Even though several other important factors, such as changes in biotopes or human activity, are not included in this study, the resulting patterns and trends are noticeable. Our models constitute the first demonstration of the impact of climate change on the activity and distribution of ticks and confirm the observed northward migration trend for this Mediterranean domestic tick.http://www.geospatialhealth.net/index.php/gh/article/view/178Rhipicephalus sanguineus, mathematical modelling, climate change, epidemiology, France. |
| spellingShingle | Frédéric Beugnet Michel Kolasinski Paul-Antoine Michelangeli Julien Vienne Harilaos Loukos Mathematical modelling of the impact of climatic conditions in France on Rhipicephalus sanguineus tick activity and density since 1960 Geospatial Health Rhipicephalus sanguineus, mathematical modelling, climate change, epidemiology, France. |
| title | Mathematical modelling of the impact of climatic conditions in France on Rhipicephalus sanguineus tick activity and density since 1960 |
| title_full | Mathematical modelling of the impact of climatic conditions in France on Rhipicephalus sanguineus tick activity and density since 1960 |
| title_fullStr | Mathematical modelling of the impact of climatic conditions in France on Rhipicephalus sanguineus tick activity and density since 1960 |
| title_full_unstemmed | Mathematical modelling of the impact of climatic conditions in France on Rhipicephalus sanguineus tick activity and density since 1960 |
| title_short | Mathematical modelling of the impact of climatic conditions in France on Rhipicephalus sanguineus tick activity and density since 1960 |
| title_sort | mathematical modelling of the impact of climatic conditions in france on rhipicephalus sanguineus tick activity and density since 1960 |
| topic | Rhipicephalus sanguineus, mathematical modelling, climate change, epidemiology, France. |
| url | http://www.geospatialhealth.net/index.php/gh/article/view/178 |
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