Identifying areas suitable for the occurrence of rift valley fever in North Africa: implications for surveillance
Rift Valley fever (RVF) is a vector-borne zoonotic disease that has caused widespread outbreaks throughout Africa and the Arabian Peninsula, with serious consequences for livestock-based economies and public health. Although there have never been any reports of RVF in Morocco, Algeria, Tunisia and Libya, it is a priority disease in the Maghreb, due to the threat of introduction of the virus through transboundary livestock movements or infected mosquito vectors. However, the implementation of surveillance activities and early warning contingency plans requires better knowledge of the epidemiological situation. We conducted a multicriteria decision analysis, integrating host distribution with a combination of important ecological factors that drive mosquito abundance, to identify hotspots and suitable time periods for RVF enzootic circulation (i.e. stable transmission at a low to moderate level for an extended period of time) and an RVF epizootic event (i.e. a sudden occurrence of a large number of infected animals over a large geographic area) in the Maghreb. We also modelled vector species distribution using available information on vector presence and habitat preference. We found that the northern regions of the Maghreb were moderately suitable for RVF enzootics, but highly suitable for RVF epizootics. The vector species distribution model identified these regions as the most favourable mosquito habitats. Due to the low density of animal hosts and arid conditions, the desert region showed low RVF suitability, except in oases. However, the presence of competent vectors in putative unsuitable areas underlines the need for further assessments of mosquito habitat preference. This study produced monthly RVF suitability maps useful for animal health managers and veterinary services involved in designing risk-based surveillance programmes. The suitability maps can be further enhanced using existing country-specific sources of information and by incorporating knowledge – as it becomes available – on the epidemiology of the disease and distribution of vectors in the Maghreb.
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dig-cirad-fr-5760912024-02-09T17:00:51Z http://agritrop.cirad.fr/576091/ http://agritrop.cirad.fr/576091/ Identifying areas suitable for the occurrence of rift valley fever in North Africa: implications for surveillance. Arsevska Elena, Hellal J., Mejri Selma, Hammami Salah, Marianneau Philippe, Calavas Didier, Hénaux Viviane. 2016. Transboundary and Emerging Diseases, 63 (6) : 658-674.https://doi.org/10.1111/tbed.12331 <https://doi.org/10.1111/tbed.12331> Identifying areas suitable for the occurrence of rift valley fever in North Africa: implications for surveillance Arsevska, Elena Hellal, J. Mejri, Selma Hammami, Salah Marianneau, Philippe Calavas, Didier Hénaux, Viviane eng 2016 Transboundary and Emerging Diseases L73 - Maladies des animaux L72 - Organismes nuisibles des animaux Virus de la fièvre de la vallée du Rift surveillance épidémiologique analyse du risque gestion du risque distribution spatiale Aedes Culex zoonose maladie transmise par vecteur fièvre de la Vallée du Rift http://aims.fao.org/aos/agrovoc/c_16463 http://aims.fao.org/aos/agrovoc/c_16411 http://aims.fao.org/aos/agrovoc/c_37936 http://aims.fao.org/aos/agrovoc/c_37934 http://aims.fao.org/aos/agrovoc/c_36230 http://aims.fao.org/aos/agrovoc/c_146 http://aims.fao.org/aos/agrovoc/c_2015 http://aims.fao.org/aos/agrovoc/c_8530 http://aims.fao.org/aos/agrovoc/c_34142 http://aims.fao.org/aos/agrovoc/c_b08d44fd Afrique du Nord http://aims.fao.org/aos/agrovoc/c_5218 Rift Valley fever (RVF) is a vector-borne zoonotic disease that has caused widespread outbreaks throughout Africa and the Arabian Peninsula, with serious consequences for livestock-based economies and public health. Although there have never been any reports of RVF in Morocco, Algeria, Tunisia and Libya, it is a priority disease in the Maghreb, due to the threat of introduction of the virus through transboundary livestock movements or infected mosquito vectors. However, the implementation of surveillance activities and early warning contingency plans requires better knowledge of the epidemiological situation. We conducted a multicriteria decision analysis, integrating host distribution with a combination of important ecological factors that drive mosquito abundance, to identify hotspots and suitable time periods for RVF enzootic circulation (i.e. stable transmission at a low to moderate level for an extended period of time) and an RVF epizootic event (i.e. a sudden occurrence of a large number of infected animals over a large geographic area) in the Maghreb. We also modelled vector species distribution using available information on vector presence and habitat preference. We found that the northern regions of the Maghreb were moderately suitable for RVF enzootics, but highly suitable for RVF epizootics. The vector species distribution model identified these regions as the most favourable mosquito habitats. Due to the low density of animal hosts and arid conditions, the desert region showed low RVF suitability, except in oases. However, the presence of competent vectors in putative unsuitable areas underlines the need for further assessments of mosquito habitat preference. This study produced monthly RVF suitability maps useful for animal health managers and veterinary services involved in designing risk-based surveillance programmes. The suitability maps can be further enhanced using existing country-specific sources of information and by incorporating knowledge – as it becomes available – on the epidemiology of the disease and distribution of vectors in the Maghreb. article info:eu-repo/semantics/article Journal Article info:eu-repo/semantics/publishedVersion http://agritrop.cirad.fr/576091/7/Arsevska_et_al-2016-Transboundary_and_Emerging_Diseases.pdf text Cirad license info:eu-repo/semantics/restrictedAccess https://agritrop.cirad.fr/mention_legale.html https://doi.org/10.1111/tbed.12331 10.1111/tbed.12331 info:eu-repo/semantics/altIdentifier/doi/10.1111/tbed.12331 info:eu-repo/semantics/altIdentifier/purl/https://doi.org/10.1111/tbed.12331 |
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Biblioteca del CIRAD Francia |
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L73 - Maladies des animaux L72 - Organismes nuisibles des animaux Virus de la fièvre de la vallée du Rift surveillance épidémiologique analyse du risque gestion du risque distribution spatiale Aedes Culex zoonose maladie transmise par vecteur fièvre de la Vallée du Rift http://aims.fao.org/aos/agrovoc/c_16463 http://aims.fao.org/aos/agrovoc/c_16411 http://aims.fao.org/aos/agrovoc/c_37936 http://aims.fao.org/aos/agrovoc/c_37934 http://aims.fao.org/aos/agrovoc/c_36230 http://aims.fao.org/aos/agrovoc/c_146 http://aims.fao.org/aos/agrovoc/c_2015 http://aims.fao.org/aos/agrovoc/c_8530 http://aims.fao.org/aos/agrovoc/c_34142 http://aims.fao.org/aos/agrovoc/c_b08d44fd http://aims.fao.org/aos/agrovoc/c_5218 L73 - Maladies des animaux L72 - Organismes nuisibles des animaux Virus de la fièvre de la vallée du Rift surveillance épidémiologique analyse du risque gestion du risque distribution spatiale Aedes Culex zoonose maladie transmise par vecteur fièvre de la Vallée du Rift http://aims.fao.org/aos/agrovoc/c_16463 http://aims.fao.org/aos/agrovoc/c_16411 http://aims.fao.org/aos/agrovoc/c_37936 http://aims.fao.org/aos/agrovoc/c_37934 http://aims.fao.org/aos/agrovoc/c_36230 http://aims.fao.org/aos/agrovoc/c_146 http://aims.fao.org/aos/agrovoc/c_2015 http://aims.fao.org/aos/agrovoc/c_8530 http://aims.fao.org/aos/agrovoc/c_34142 http://aims.fao.org/aos/agrovoc/c_b08d44fd http://aims.fao.org/aos/agrovoc/c_5218 |
spellingShingle |
L73 - Maladies des animaux L72 - Organismes nuisibles des animaux Virus de la fièvre de la vallée du Rift surveillance épidémiologique analyse du risque gestion du risque distribution spatiale Aedes Culex zoonose maladie transmise par vecteur fièvre de la Vallée du Rift http://aims.fao.org/aos/agrovoc/c_16463 http://aims.fao.org/aos/agrovoc/c_16411 http://aims.fao.org/aos/agrovoc/c_37936 http://aims.fao.org/aos/agrovoc/c_37934 http://aims.fao.org/aos/agrovoc/c_36230 http://aims.fao.org/aos/agrovoc/c_146 http://aims.fao.org/aos/agrovoc/c_2015 http://aims.fao.org/aos/agrovoc/c_8530 http://aims.fao.org/aos/agrovoc/c_34142 http://aims.fao.org/aos/agrovoc/c_b08d44fd http://aims.fao.org/aos/agrovoc/c_5218 L73 - Maladies des animaux L72 - Organismes nuisibles des animaux Virus de la fièvre de la vallée du Rift surveillance épidémiologique analyse du risque gestion du risque distribution spatiale Aedes Culex zoonose maladie transmise par vecteur fièvre de la Vallée du Rift http://aims.fao.org/aos/agrovoc/c_16463 http://aims.fao.org/aos/agrovoc/c_16411 http://aims.fao.org/aos/agrovoc/c_37936 http://aims.fao.org/aos/agrovoc/c_37934 http://aims.fao.org/aos/agrovoc/c_36230 http://aims.fao.org/aos/agrovoc/c_146 http://aims.fao.org/aos/agrovoc/c_2015 http://aims.fao.org/aos/agrovoc/c_8530 http://aims.fao.org/aos/agrovoc/c_34142 http://aims.fao.org/aos/agrovoc/c_b08d44fd http://aims.fao.org/aos/agrovoc/c_5218 Arsevska, Elena Hellal, J. Mejri, Selma Hammami, Salah Marianneau, Philippe Calavas, Didier Hénaux, Viviane Identifying areas suitable for the occurrence of rift valley fever in North Africa: implications for surveillance |
description |
Rift Valley fever (RVF) is a vector-borne zoonotic disease that has caused widespread outbreaks throughout Africa and the Arabian Peninsula, with serious consequences for livestock-based economies and public health. Although there have never been any reports of RVF in Morocco, Algeria, Tunisia and Libya, it is a priority disease in the Maghreb, due to the threat of introduction of the virus through transboundary livestock movements or infected mosquito vectors. However, the implementation of surveillance activities and early warning contingency plans requires better knowledge of the epidemiological situation. We conducted a multicriteria decision analysis, integrating host distribution with a combination of important ecological factors that drive mosquito abundance, to identify hotspots and suitable time periods for RVF enzootic circulation (i.e. stable transmission at a low to moderate level for an extended period of time) and an RVF epizootic event (i.e. a sudden occurrence of a large number of infected animals over a large geographic area) in the Maghreb. We also modelled vector species distribution using available information on vector presence and habitat preference. We found that the northern regions of the Maghreb were moderately suitable for RVF enzootics, but highly suitable for RVF epizootics. The vector species distribution model identified these regions as the most favourable mosquito habitats. Due to the low density of animal hosts and arid conditions, the desert region showed low RVF suitability, except in oases. However, the presence of competent vectors in putative unsuitable areas underlines the need for further assessments of mosquito habitat preference. This study produced monthly RVF suitability maps useful for animal health managers and veterinary services involved in designing risk-based surveillance programmes. The suitability maps can be further enhanced using existing country-specific sources of information and by incorporating knowledge – as it becomes available – on the epidemiology of the disease and distribution of vectors in the Maghreb. |
format |
article |
topic_facet |
L73 - Maladies des animaux L72 - Organismes nuisibles des animaux Virus de la fièvre de la vallée du Rift surveillance épidémiologique analyse du risque gestion du risque distribution spatiale Aedes Culex zoonose maladie transmise par vecteur fièvre de la Vallée du Rift http://aims.fao.org/aos/agrovoc/c_16463 http://aims.fao.org/aos/agrovoc/c_16411 http://aims.fao.org/aos/agrovoc/c_37936 http://aims.fao.org/aos/agrovoc/c_37934 http://aims.fao.org/aos/agrovoc/c_36230 http://aims.fao.org/aos/agrovoc/c_146 http://aims.fao.org/aos/agrovoc/c_2015 http://aims.fao.org/aos/agrovoc/c_8530 http://aims.fao.org/aos/agrovoc/c_34142 http://aims.fao.org/aos/agrovoc/c_b08d44fd http://aims.fao.org/aos/agrovoc/c_5218 |
author |
Arsevska, Elena Hellal, J. Mejri, Selma Hammami, Salah Marianneau, Philippe Calavas, Didier Hénaux, Viviane |
author_facet |
Arsevska, Elena Hellal, J. Mejri, Selma Hammami, Salah Marianneau, Philippe Calavas, Didier Hénaux, Viviane |
author_sort |
Arsevska, Elena |
title |
Identifying areas suitable for the occurrence of rift valley fever in North Africa: implications for surveillance |
title_short |
Identifying areas suitable for the occurrence of rift valley fever in North Africa: implications for surveillance |
title_full |
Identifying areas suitable for the occurrence of rift valley fever in North Africa: implications for surveillance |
title_fullStr |
Identifying areas suitable for the occurrence of rift valley fever in North Africa: implications for surveillance |
title_full_unstemmed |
Identifying areas suitable for the occurrence of rift valley fever in North Africa: implications for surveillance |
title_sort |
identifying areas suitable for the occurrence of rift valley fever in north africa: implications for surveillance |
url |
http://agritrop.cirad.fr/576091/ http://agritrop.cirad.fr/576091/7/Arsevska_et_al-2016-Transboundary_and_Emerging_Diseases.pdf |
work_keys_str_mv |
AT arsevskaelena identifyingareassuitablefortheoccurrenceofriftvalleyfeverinnorthafricaimplicationsforsurveillance AT hellalj identifyingareassuitablefortheoccurrenceofriftvalleyfeverinnorthafricaimplicationsforsurveillance AT mejriselma identifyingareassuitablefortheoccurrenceofriftvalleyfeverinnorthafricaimplicationsforsurveillance AT hammamisalah identifyingareassuitablefortheoccurrenceofriftvalleyfeverinnorthafricaimplicationsforsurveillance AT marianneauphilippe identifyingareassuitablefortheoccurrenceofriftvalleyfeverinnorthafricaimplicationsforsurveillance AT calavasdidier identifyingareassuitablefortheoccurrenceofriftvalleyfeverinnorthafricaimplicationsforsurveillance AT henauxviviane identifyingareassuitablefortheoccurrenceofriftvalleyfeverinnorthafricaimplicationsforsurveillance |
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1792498829485932544 |