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Eskew EA, Bird BH, Ghersi BM, Bangura J, Basinski AJ, Amara E, Bah MA, Kanu MC, Kanu OT, Lavalie EG, Lungay V, Robert W, Vandi MA, Fichet-Calvet E, Nuismer SL. Reservoir displacement by an invasive rodent reduces Lassa virus zoonotic spillover risk. Nat Commun 2024; 15:3589. [PMID: 38678025 PMCID: PMC11055883 DOI: 10.1038/s41467-024-47991-1] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/04/2023] [Accepted: 04/17/2024] [Indexed: 04/29/2024] Open
Abstract
The black rat (Rattus rattus) is a globally invasive species that has been widely introduced across Africa. Within its invasive range in West Africa, R. rattus may compete with the native rodent Mastomys natalensis, the primary reservoir host of Lassa virus, a zoonotic pathogen that kills thousands annually. Here, we use rodent trapping data from Sierra Leone and Guinea to show that R. rattus presence reduces M. natalensis density within the human dwellings where Lassa virus exposure is most likely to occur. Further, we integrate infection data from M. natalensis to demonstrate that Lassa virus zoonotic spillover risk is lower at sites with R. rattus. While non-native species can have numerous negative effects on ecosystems, our results suggest that R. rattus invasion has the indirect benefit of decreasing zoonotic spillover of an endemic pathogen, with important implications for invasive species control across West Africa.
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Affiliation(s)
- Evan A Eskew
- Institute for Interdisciplinary Data Sciences, University of Idaho, Moscow, ID, USA.
| | - Brian H Bird
- One Health Institute, School of Veterinary Medicine, University of California - Davis, Davis, CA, USA
| | - Bruno M Ghersi
- One Health Institute, School of Veterinary Medicine, University of California - Davis, Davis, CA, USA
- Cummings School of Veterinary Medicine, Tufts University, North Grafton, MA, USA
| | | | - Andrew J Basinski
- Institute for Interdisciplinary Data Sciences, University of Idaho, Moscow, ID, USA
| | | | - Mohamed A Bah
- Ministry of Agriculture and Forestry, Freetown, Sierra Leone
| | | | | | | | | | | | | | | | - Scott L Nuismer
- Department of Biological Sciences, University of Idaho, Moscow, ID, USA.
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2
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Granjon L, Artige E, Bâ K, Brouat C, Dalecky A, Diagne C, Diallo M, Fossati‐Gaschignard O, Gauthier P, Kane M, Husse L, Niang Y, Piry S, Sarr N, Sow A, Duplantier J. Sharing space between native and invasive small mammals: Study of commensal communities in Senegal. Ecol Evol 2023; 13:e10539. [PMID: 37745790 PMCID: PMC10511302 DOI: 10.1002/ece3.10539] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/04/2023] [Revised: 08/18/2023] [Accepted: 09/04/2023] [Indexed: 09/26/2023] Open
Abstract
Urbanization processes are taking place at a very high rate, especially in Africa. At the same time, a number of small mammal species, be they native or invasive, take advantage of human-induced habitat modifications. They represent commensal communities of organisms that cause a number of inconveniences to humans, including potential reservoirs of zoonotic diseases. We studied via live trapping and habitat characterization such commensal small mammal communities in small villages to large cities of Senegal, to try to understand how the species share this particular space. Seven major species were recorded, with exotic invasive house mice (Mus musculus) and black rats (Rattus rattus) dominating in numbers. The shrew Crocidura olivieri appeared as the main and more widespread native species, while native rodent species (Mastomys natalensis, M. erythroleucus, Arvicanthis niloticus and Praomys daltoni) were less abundant and/or more localized. Habitat preferences, compared between species in terms of room types and characteristics, showed differences among house mice, black rats and M. natalensis especially. Niche (habitat component) breadth and overlap were measured. Among invasive species, the house mouse showed a larger niche breadth than the black rat, and overall, all species displayed high overlap values. Co-occurrence patterns were studied at the global and local scales. The latter show cases of aggregation (between the black rat and native species, for instance) and of segregation (as between the house mouse and the black rat in Tambacounda, or between the black rat and M. natalensis in Kédougou). While updating information on commensal small mammal distribution in Senegal, a country submitted to a dynamic process of invasion by the black rat and the house mouse, we bring original information on how species occupy and share the commensal space, and make predictions on the evolution of these communities in a period of ever-accelerating global changes.
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Affiliation(s)
- Laurent Granjon
- CBGP, IRD, INRAE, CIRAD, Montpellier SupAgro, Univ MontpellierMontpellierFrance
| | - Emanuelle Artige
- CBGP, IRD, INRAE, CIRAD, Montpellier SupAgro, Univ MontpellierMontpellierFrance
| | - Khalilou Bâ
- BIOPASS, CBGP‐IRD, ISRA, UCAD, CIRADDakarSenegal
| | - Carine Brouat
- CBGP, IRD, INRAE, CIRAD, Montpellier SupAgro, Univ MontpellierMontpellierFrance
| | | | - Christophe Diagne
- CBGP, IRD, INRAE, CIRAD, Montpellier SupAgro, Univ MontpellierMontpellierFrance
| | | | | | - Philippe Gauthier
- CBGP, IRD, INRAE, CIRAD, Montpellier SupAgro, Univ MontpellierMontpellierFrance
| | - Mamadou Kane
- BIOPASS, CBGP‐IRD, ISRA, UCAD, CIRADDakarSenegal
| | - Laëtitia Husse
- CBGP, IRD, INRAE, CIRAD, Montpellier SupAgro, Univ MontpellierMontpellierFrance
- BIOPASS, CBGP‐IRD, ISRA, UCAD, CIRADDakarSenegal
| | | | - Sylvain Piry
- CBGP, IRD, INRAE, CIRAD, Montpellier SupAgro, Univ MontpellierMontpellierFrance
| | | | - Aliou Sow
- BIOPASS, CBGP‐IRD, ISRA, UCAD, CIRADDakarSenegal
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3
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Castel G, Filippone C, Tatard C, Vigan J, Dobigny G. Role of Seaports and Imported Rats in Seoul Hantavirus Circulation, Africa. Emerg Infect Dis 2023; 29:20-25. [PMID: 36573519 PMCID: PMC9796207 DOI: 10.3201/eid2901.221092] [Citation(s) in RCA: 4] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/29/2022] Open
Abstract
Seoul orthohantavirus (SEOV) is not considered a major public health threat on the continent of Africa. However, Africa is exposed to rodentborne SEOV introduction events through maritime traffic after exponential growth of trade with the rest of the world. Serologic studies have already detected hantavirus antibodies in human populations, and recent investigations have confirmed circulation of hantavirus, including SEOV, in rat populations. Thus, SEOV is a possible emerging zoonotic risk in Africa. Moreover, the range of SEOV could rapidly expand, and transmission to humans could increase because of host switching from the usual brown rat (Rattus norvegicus) species, which is currently invading Africa, to the more widely installed black rat (R. rattus) species. Because of rapid economic development, environmental and climatic changes, and increased international trade, strengthened surveillance is urgently needed to prevent SEOV dissemination among humans in Africa.
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4
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Diagne C, Ballesteros-Mejia L, Cuthbert RN, Bodey TW, Fantle-Lepczyk J, Angulo E, Bang A, Dobigny G, Courchamp F. Economic costs of invasive rodents worldwide: the tip of the iceberg. PeerJ 2023; 11:e14935. [PMID: 36992943 PMCID: PMC10042159 DOI: 10.7717/peerj.14935] [Citation(s) in RCA: 3] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/13/2022] [Accepted: 01/31/2023] [Indexed: 03/31/2023] Open
Abstract
Background Rodents are among the most notorious invasive alien species worldwide. These invaders have substantially impacted native ecosystems, food production and storage, local infrastructures, human health and well-being. However, the lack of standardized and understandable estimation of their impacts is a serious barrier to raising societal awareness, and hampers effective management interventions at relevant scales. Methods Here, we assessed the economic costs of invasive alien rodents globally in order to help overcome these obstacles. For this purpose, we combined and analysed economic cost data from the InvaCost database-the most up-to-date and comprehensive synthesis of reported invasion costs-and specific complementary searches within and beyond the published literature. Results Our conservative analysis showed that reported costs of rodent invasions reached a conservative total of US$ 3.6 billion between 1930 and 2022 (annually US$ 87.5 million between 1980 and 2022), and were significantly increasing through time. The highest cost reported was for muskrat Ondatra zibethicus (US$ 377.5 million), then unspecified Rattus spp. (US$ 327.8 million), followed by Rattus norvegicus specifically (US$ 156.6 million) and Castor canadensis (US$ 150.4 million). Of the total costs, 87% were damage-related, principally impacting agriculture and predominantly reported in Asia (60%), Europe (19%) and North America (9%). Our study evidenced obvious cost underreporting with only 99 documents gathered globally, clear taxonomic gaps, reliability issues for cost assessment, and skewed breakdowns of costs among regions, sectors and contexts. As a consequence, these reported costs represent only a very small fraction of the expected true cost of rodent invasions (e.g., using a less conservative analytic approach would have led to a global amount more than 80-times higher than estimated here). Conclusions These findings strongly suggest that available information represents a substantial underestimation of the global costs incurred. We offer recommendations for improving estimates of costs to fill these knowledge gaps including: systematic distinction between native and invasive rodents' impacts; monetizing indirect impacts on human health; and greater integrative and concerted research effort between scientists and stakeholders. Finally, we discuss why and how this approach will stimulate and provide support for proactive and sustainable management strategies in the context of alien rodent invasions, for which biosecurity measures should be amplified globally.
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Affiliation(s)
- Christophe Diagne
- CBGP, Univ Montpellier, CIRAD, INRAE, Institut Agro, IRD, Montferrier-sur-Lez, France
- Université Paris-Saclay, CNRS, AgroParisTech, Ecologie Systématique Evolution, Orsay, France
| | | | - Ross N. Cuthbert
- Institute for Global Food Security, School of Biological Sciences, Queen’s University Belfast, Belfast, United Kingdom
| | - Thomas W. Bodey
- School of Biological Sciences, King’s College, University of Aberdeen, Aberdeen, United Kingdom
| | | | - Elena Angulo
- Université Paris-Saclay, CNRS, AgroParisTech, Ecologie Systématique Evolution, Orsay, France
- Estación Biológica de Doñana (CSIC), Sevilla, Spain
| | - Alok Bang
- Society for Ecology Evolution and Development, Wardha, India
| | - Gauthier Dobigny
- CBGP, Univ Montpellier, CIRAD, INRAE, Institut Agro, IRD, Montferrier-sur-Lez, France
- Unité Peste, Institut Pasteur de Madagascar, BP 1274 Ambatofotsikely Avaradoha, 101 Antananarivo, Madagascar
| | - Franck Courchamp
- Université Paris-Saclay, CNRS, AgroParisTech, Ecologie Systématique Evolution, Orsay, France
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Etougbétché JR, Hamidović A, Dossou HJ, Coan-Grosso M, Roques R, Plault N, Houéménou G, Badou S, Missihoun AA, Abdou Karim IY, Galal L, Diagne C, Dardé ML, Dobigny G, Mercier A. Molecular prevalence, genetic characterization and patterns of Toxoplasma gondii infection in domestic small mammals from Cotonou, Benin. Parasite 2022; 29:58. [PMID: 36562439 PMCID: PMC9879161 DOI: 10.1051/parasite/2022058] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/06/2022] [Accepted: 11/28/2022] [Indexed: 12/24/2022] Open
Abstract
Toxoplasmosis, one of the most prevalent parasitic infections in humans and animals, is caused by the intracellular protozoan parasite Toxoplasma gondii. Small mammals play a key role as intermediate reservoir hosts in the maintenance of the T. gondii life cycle. In this study, we estimated the molecular prevalence and provide genetic diversity data for T. gondii in 632 small mammals sampled in four areas of Cotonou city, Benin. Both the brain and heart of each individual were screened through T. gondii-targeting qPCR, and positive samples were then genotyped using a set of 15 T. gondii-specific microsatellites. Prevalence data were statistically analyzed in order to assess the relative impact of individual host characteristics, spatial distribution, composition of small mammal community, and urban landscape features. An overall T. gondii molecular prevalence of 15.2% was found and seven genotypes, all belonging to the Africa 1 lineage, could be retrieved from the invasive black rat Rattus rattus and the native African giant shrew Crocidura olivieri. Statistical analyses did not suggest any significant influence of the environmental parameters used in this study. Rather, depending on the local context, T. gondii prevalence appeared to be associated either with black rat, shrew, or mouse abundance or with the trapping period. Overall, our results highlight the intricate relationships between biotic and abiotic factors involved in T. gondii epidemiology and suggest that R. rattus and C. olivieri are two competent reservoirs for the Africa 1 lineage, a widespread lineage in tropical Africa and the predominant lineage in Benin.
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Affiliation(s)
- Jonas R. Etougbétché
- Ecole Polytechnique d’Abomey-Calavi, Laboratoire de Recherche en Biologie Appliquée, Unité de Recherche sur les Invasions Biologiques, Université d’Abomey-Calavi 01 BP 2009 Cotonou Benin,Laboratoire de Génétique Moléculaire et d’Analyse des Génomes, Faculté des Sciences et Techniques, Université d’Abomey-Calavi 01BP 526 Cotonou Bénin,Corresponding authors: ;
| | - Azra Hamidović
- Inserm U1094, IRD U270, Univ. Limoges, CHU Limoges, EpiMaCT - Epidémiologie des maladies chroniques en zone tropicale, Institut d’Epidémiologie et de Neurologie Tropicale, Omega Health 87000 Limoges France
| | - Henri-Joël Dossou
- Ecole Polytechnique d’Abomey-Calavi, Laboratoire de Recherche en Biologie Appliquée, Unité de Recherche sur les Invasions Biologiques, Université d’Abomey-Calavi 01 BP 2009 Cotonou Benin,Institut du Cadre de Vie (ICaV), Université d’Abomey-Calavi BP 2899 Abomey-Calavi Benin
| | - Maeva Coan-Grosso
- Inserm U1094, IRD U270, Univ. Limoges, CHU Limoges, EpiMaCT - Epidémiologie des maladies chroniques en zone tropicale, Institut d’Epidémiologie et de Neurologie Tropicale, Omega Health 87000 Limoges France
| | - Roxane Roques
- Inserm U1094, IRD U270, Univ. Limoges, CHU Limoges, EpiMaCT - Epidémiologie des maladies chroniques en zone tropicale, Institut d’Epidémiologie et de Neurologie Tropicale, Omega Health 87000 Limoges France
| | - Nicolas Plault
- Inserm U1094, IRD U270, Univ. Limoges, CHU Limoges, EpiMaCT - Epidémiologie des maladies chroniques en zone tropicale, Institut d’Epidémiologie et de Neurologie Tropicale, Omega Health 87000 Limoges France
| | - Gualbert Houéménou
- Ecole Polytechnique d’Abomey-Calavi, Laboratoire de Recherche en Biologie Appliquée, Unité de Recherche sur les Invasions Biologiques, Université d’Abomey-Calavi 01 BP 2009 Cotonou Benin
| | - Sylvestre Badou
- Ecole Polytechnique d’Abomey-Calavi, Laboratoire de Recherche en Biologie Appliquée, Unité de Recherche sur les Invasions Biologiques, Université d’Abomey-Calavi 01 BP 2009 Cotonou Benin
| | - Antoine A. Missihoun
- Laboratoire de Génétique Moléculaire et d’Analyse des Génomes, Faculté des Sciences et Techniques, Université d’Abomey-Calavi 01BP 526 Cotonou Bénin
| | - Issaka Youssao Abdou Karim
- Ecole Polytechnique d’Abomey-Calavi, Laboratoire de Biotechnologie Animale et de Technologie des Viandes, Université d’Abomey-Calavi 01 BP 2009 Cotonou Benin
| | - Lokman Galal
- Inserm U1094, IRD U270, Univ. Limoges, CHU Limoges, EpiMaCT - Epidémiologie des maladies chroniques en zone tropicale, Institut d’Epidémiologie et de Neurologie Tropicale, Omega Health 87000 Limoges France
| | - Christophe Diagne
- Institut de Recherche pour le Développement, UMR CBGP (IRD, INRA, Cirad, Montpellier SupAgro), Montpellier Université d’Excellence 755 avenue du campus Agropolis 34988 Montferrier-sur-Lez Cedex France
| | - Marie-Laure Dardé
- Inserm U1094, IRD U270, Univ. Limoges, CHU Limoges, EpiMaCT - Epidémiologie des maladies chroniques en zone tropicale, Institut d’Epidémiologie et de Neurologie Tropicale, Omega Health 87000 Limoges France,Centre National de Référence (CNR) Toxoplasmose/Toxoplasma Biological Center (BRC), Centre Hospitalier-Universitaire Dupuytren 87000 Limoges France
| | - Gauthier Dobigny
- Institut de Recherche pour le Développement, UMR CBGP (IRD, INRA, Cirad, Montpellier SupAgro), Montpellier Université d’Excellence 755 avenue du campus Agropolis 34988 Montferrier-sur-Lez Cedex France,Unité Peste, Institut Pasteur de Madagascar BP 1274 Ambatofotsikely Avaradoha 101 Antananarivo Madagascar
| | - Aurélien Mercier
- Inserm U1094, IRD U270, Univ. Limoges, CHU Limoges, EpiMaCT - Epidémiologie des maladies chroniques en zone tropicale, Institut d’Epidémiologie et de Neurologie Tropicale, Omega Health 87000 Limoges France,Centre National de Référence (CNR) Toxoplasmose/Toxoplasma Biological Center (BRC), Centre Hospitalier-Universitaire Dupuytren 87000 Limoges France
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Dossou H, Le Guyader M, Gauthier P, Badou S, Etougbetche J, Houemenou G, Djelouadji Z, Dobigny G. Fine-scale prevalence and genetic diversity of urban small mammal-borne pathogenic Leptospira in Africa: A spatiotemporal survey within Cotonou, Benin. Zoonoses Public Health 2022; 69:643-654. [PMID: 35524648 PMCID: PMC9540415 DOI: 10.1111/zph.12953] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/05/2021] [Revised: 04/11/2022] [Accepted: 04/13/2022] [Indexed: 11/30/2022]
Abstract
Leptospirosis is a zoonotic disease that is caused by spirochete bacteria of the genus Leptospira. Around the world, one million people each year are infected, leading to 60,000 deaths. Infection occurs through contact with environmental pathogens excreted by mammals (notably rodents). Data on Leptospira and leptospirosis in Africa are rather scarce, especially in urban habitats though these appear to be favourable environments for the pathogen circulation and human contamination. Using qPCR, DNA sequencing as well as MST/VNTR approaches, we examined Leptospira occurrence and genetic diversity in 779 commensal small mammals that were sampled over 2 years in the city centre of Cotonou, Benin, from three neighbourhoods with contrasting socio-environmental conditions. Overall prevalence reached 9.1%. However, very marked variations in both space and time were observed, with local peaks of high prevalence but no clear seasonal pattern. In most sites that could be regularly sampled, Leptospira-positive rodents were found at least once, thus confirming the widespread circulation of the pathogen within small mammal communities of Cotonou. Interestingly, an unusual diversity of small mammal-borne Leptospira species and genotypes was retrieved, with up to four species and three different genovars within the same neighbourhood, and even instances of two species and two genovars identified simultaneously within the same household. To our knowledge, such a high genetic diversity has never been described at such a fine scale, a fortiori in Africa and, more generally, within an urban environment. Altogether, our results underline that much remains unknown about leptospirosis as well as the associated infectious risk in African cities where the disease may be massively over-looked.
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Affiliation(s)
- Henri‐Joël Dossou
- Laboratoire de Recherche en Biologie Appliquée, Ecole Polytechnique d'Abomey‐CalaviUniversité d'Abomey‐CalaviCotonouBenin
- Institut de Géographie, Aménagement du Territoire et EnvironnementUniversité d'Abomey‐CalaviCotonouBenin
- Institut de Recherche pour le DéveloppementCentre de Biologie pour la Gestion des Populations (UMR IRD, INRAE, Cirad, Institut d'Agronomie), MUSEMontferrier‐sur‐LezFrance
| | - Marine Le Guyader
- USC1233‐INRAE Rongeurs Sauvages, Risque Sanitaire et Gestion des PopulationsVetAgro SupMarcy‐l'EtoileFrance
| | - Philippe Gauthier
- Institut de Recherche pour le DéveloppementCentre de Biologie pour la Gestion des Populations (UMR IRD, INRAE, Cirad, Institut d'Agronomie), MUSEMontferrier‐sur‐LezFrance
| | - Sylvestre Badou
- Laboratoire de Recherche en Biologie Appliquée, Ecole Polytechnique d'Abomey‐CalaviUniversité d'Abomey‐CalaviCotonouBenin
- Institut de Recherche pour le DéveloppementCentre de Biologie pour la Gestion des Populations (UMR IRD, INRAE, Cirad, Institut d'Agronomie), MUSEMontferrier‐sur‐LezFrance
| | - Jonas Etougbetche
- Laboratoire de Recherche en Biologie Appliquée, Ecole Polytechnique d'Abomey‐CalaviUniversité d'Abomey‐CalaviCotonouBenin
- Institut de Recherche pour le DéveloppementCentre de Biologie pour la Gestion des Populations (UMR IRD, INRAE, Cirad, Institut d'Agronomie), MUSEMontferrier‐sur‐LezFrance
| | - Gualbert Houemenou
- Laboratoire de Recherche en Biologie Appliquée, Ecole Polytechnique d'Abomey‐CalaviUniversité d'Abomey‐CalaviCotonouBenin
| | - Zouheira Djelouadji
- USC1233‐INRAE Rongeurs Sauvages, Risque Sanitaire et Gestion des PopulationsVetAgro SupMarcy‐l'EtoileFrance
| | - Gauthier Dobigny
- Institut de Recherche pour le DéveloppementCentre de Biologie pour la Gestion des Populations (UMR IRD, INRAE, Cirad, Institut d'Agronomie), MUSEMontferrier‐sur‐LezFrance
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7
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Diagne C, Turbelin AJ, Moodley D, Novoa A, Leroy B, Angulo E, Adamjy T, Dia CA, Taheri A, Tambo J, Dobigny G, Courchamp F. The economic costs of biological invasions in Africa: a growing but neglected threat? NEOBIOTA 2021. [DOI: 10.3897/neobiota.67.59132] [Citation(s) in RCA: 22] [Impact Index Per Article: 7.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
Abstract
Biological invasions can dramatically impact natural ecosystems and human societies. However, although knowledge of the economic impacts of biological invasions provides crucial insights for efficient management and policy, reliable syntheses are still lacking. This is particularly true for low income countries where economic resources are insufficient to control the effects of invasions. In this study, we relied on the recently developed "InvaCost" database – the most comprehensive repository on the monetised impacts of invasive alien species worldwide – to produce the first synthesis of economic costs of biological invasions on the African continent. We found that the reported costs of invasions ranged between US$ 18.2 billion and US$ 78.9 billion between 1970 and 2020. This represents a massive, yet highly underestimated economic burden for African countries. More alarmingly, these costs are exponentially increasing over time, without any signs of abatement in the near future. The reported costs were mostly driven by damage caused by invaders rather than expenses incurred for management. This trend was highly skewed towards a few regions (i.e. Southern and Eastern Africa) and activity sectors (i.e. agriculture) and incurred by a small number of invasive taxa (i.e. mainly three insect pests: Chilo partellus, Tuta absoluta, Spodoptera frugiperda). We also highlight crucial, large gaps in current knowledge on the economic costs of invasions that still need to be bridged with more widespread research effort and management actions across the continent. Finally, our study provides support for developing and implementing preventive measures as well as integrated post-invasion management actions at both national and regional levels. Considering the complex societal and economic realities in African countries, the currently neglected problem of biological invasions should become a priority for sustainable development.
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8
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Mastomys natalensis (Smith, 1834) as a natural host for Schistosoma haematobium (Bilharz, 1852) Weinland, 1858 x Schistosoma bovis Sonsino, 1876 introgressive hybrids. Parasitol Res 2021; 120:1755-1770. [PMID: 33687566 PMCID: PMC8084788 DOI: 10.1007/s00436-021-07099-7] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/08/2020] [Accepted: 02/21/2021] [Indexed: 11/04/2022]
Abstract
Cercarial emission of schistosomes is a determinant in the transmission to the definitive host and constitutes a good marker to identify which definitive host is responsible for transmission, mainly in introgressive hybridization situations. Our goal was to test the hypothesis that micro-mammals play a role in Schistosoma haematobium, S. bovis, and/or S. haematobium x S. bovis transmission. Small mammal sampling was conducted in seven semi-lacustrine villages of southern Benin. Among the 62 animals trapped, 50 individuals were investigated for Schistosoma adults and eggs: 37 Rattus rattus, 3 Rattus norvegicus, 9 Mastomys natalensis, and 1 Crocidura olivieri. Schistosoma adults were found in four R. rattus and two M. natalensis, with a local prevalence reaching 80% and 50%, respectively. Two cercarial chronotypes were found from Bulinus globosus experimentally infected with miracidia extracted from naturally infected M. natalensis: a late diurnal and nocturnal chronotype, and an early diurnal, late diurnal, and nocturnal chronotype. The cytochrome C oxidase subunit I mtDNA gene of the collected schistosomes (adults, miracidia, and cercariae) belonged to the S. bovis clade. Eleven internal transcribed spacer rDNA profiles were found; four belonged to S. bovis and seven to S. haematobium x S. bovis. These molecular results together with the observed multi-peak chronotypes add M. natalensis as a new host implicated in S. haematobium x S. bovis transmission. We discuss the origin of the new chronotypes which have become more complex with the appearance of several peaks in a 24-h day. We also discuss how the new populations of offspring may optimize intra-host ecological niche, host spectrum, and transmission time period.
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9
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Mangombi JB, N’dilimabaka N, Lekana-Douki JB, Banga O, Maghendji-Nzondo S, Bourgarel M, Leroy E, Fenollar F, Mediannikov O. First investigation of pathogenic bacteria, protozoa and viruses in rodents and shrews in context of forest-savannah-urban areas interface in the city of Franceville (Gabon). PLoS One 2021; 16:e0248244. [PMID: 33684147 PMCID: PMC7939261 DOI: 10.1371/journal.pone.0248244] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/27/2020] [Accepted: 02/23/2021] [Indexed: 12/29/2022] Open
Abstract
Rodents are reservoirs of numerous zoonotic diseases caused by bacteria, protozoans, or viruses. In Gabon, the circulation and maintenance of rodent-borne zoonotic infectious agents are poorly studied and are often limited to one type of pathogen. Among the three existing studies on this topic, two are focused on a zoonotic virus, and the third is focused on rodent Plasmodium. In this study, we searched for a wide range of bacteria, protozoa and viruses in different organs of rodents from the town of Franceville in Gabon. Samples from one hundred and ninety-eight (198) small mammals captured, including two invasive rodent species, five native rodent species and 19 shrews belonging to the Soricidae family, were screened. The investigated pathogens were bacteria from the Rickettsiaceae and Anaplasmataceae families, Mycoplasma spp., Bartonella spp., Borrelia spp., Orientia spp., Occidentia spp., Leptospira spp., Streptobacillus moniliformis, Coxiella burnetii, and Yersinia pestis; parasites from class Kinetoplastida spp. (Leishmania spp., Trypanosoma spp.), Piroplasmidae spp., and Toxoplasma gondii; and viruses from Paramyxoviridae, Hantaviridae, Flaviviridae and Mammarenavirus spp. We identified the following pathogenic bacteria: Anaplasma spp. (8.1%; 16/198), Bartonella spp. (6.6%; 13/198), Coxiella spp. (5.1%; 10/198) and Leptospira spp. (3.5%; 7/198); and protozoans: Piroplasma sp. (1%; 2/198), Toxoplasma gondii (0.5%; 1/198), and Trypanosoma sp. (7%; 14/198). None of the targeted viral genes were detected. These pathogens were found in Gabonese rodents, mainly Lophuromys sp., Lemniscomys striatus and Praomys sp. We also identified new genotypes: Candidatus Bartonella gabonensis and Uncultured Anaplasma spp. This study shows that rodents in Gabon harbor some human pathogenic bacteria and protozoans. It is necessary to determine whether the identified microorganisms are capable of undergoing zoonotic transmission from rodents to humans and if they may be responsible for human cases of febrile disease of unknown etiology in Gabon.
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Affiliation(s)
- Joa Braïthe Mangombi
- Centre Interdisciplinaire de Recherches Médicales de Franceville (CIRMF), Franceville, Gabon
- Aix Marseille Univ, IRD, AP-HM, Microbes, VITROME, Marseille, France
- IHU Méditerranée Infection, Marseille, France
| | - Nadine N’dilimabaka
- Centre Interdisciplinaire de Recherches Médicales de Franceville (CIRMF), Franceville, Gabon
- Département de Biologie, Faculté des sciences, Université des Sciences et Techniques de Masuku (USTM), Franceville, Gabon
| | - Jean-Bernard Lekana-Douki
- Centre Interdisciplinaire de Recherches Médicales de Franceville (CIRMF), Franceville, Gabon
- Département de Parasitologie, Université des Sciences de la Santé (USS), Owendo, Libreville
| | - Octavie Banga
- Centre Interdisciplinaire de Recherches Médicales de Franceville (CIRMF), Franceville, Gabon
| | - Sydney Maghendji-Nzondo
- Département Epidémiologie-Biostatistique et Informatique Médicale (DEBIM), Université des Sciences de la Santé (USS), Owendo, Libreville
| | - Mathieu Bourgarel
- CIRAD, UMR ASTRE, Harare, Zimbabwe
- ASTRE, Univ Montpellier, CIRAD, INRA, Montpellier, France
| | - Eric Leroy
- Centre Interdisciplinaire de Recherches Médicales de Franceville (CIRMF), Franceville, Gabon
- UMR MIVEGEC IRD-CNRS-UM, IRD, Montpellier, France
| | - Florence Fenollar
- Aix Marseille Univ, IRD, AP-HM, Microbes, VITROME, Marseille, France
- IHU Méditerranée Infection, Marseille, France
| | - Oleg Mediannikov
- IHU Méditerranée Infection, Marseille, France
- Aix Marseille Univ, IRD, AP-HM, Microbes, MEPHI, Marseille, France
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10
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Hamidović A, Etougbétché JR, Tonouhewa ABN, Galal L, Dobigny G, Houémènou G, Da Zoclanclounon H, Amagbégnon R, Laleye A, Fievet N, Piry S, Berthier K, Pena HFJ, Dardé ML, Mercier A. A hotspot of Toxoplasma gondii Africa 1 lineage in Benin: How new genotypes from West Africa contribute to understand the parasite genetic diversity worldwide. PLoS Negl Trop Dis 2021; 15:e0008980. [PMID: 33571262 PMCID: PMC7904144 DOI: 10.1371/journal.pntd.0008980] [Citation(s) in RCA: 13] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/02/2020] [Revised: 02/24/2021] [Accepted: 11/12/2020] [Indexed: 12/16/2022] Open
Abstract
Through international trades, Europe, Africa and South America share a long history of exchanges, potentially of pathogens. We used the worldwide parasite Toxoplasma gondii to test the hypothesis of a historical influence on pathogen genetic diversity in Benin, a West African country with a longstanding sea trade history. In Africa, T. gondii spatial structure is still non-uniformly studied and very few articles have reported strain genetic diversity in fauna and clinical forms of human toxoplasmosis so far, even in African diaspora. Sera from 758 domestic animals (mainly poultry) in two coastal areas (Cotonou and Ouidah) and two inland areas (Parakou and Natitingou) were tested for T. gondii antibodies using a Modified Agglutination Test (MAT). The hearts and brains of 69 seropositive animals were collected for parasite isolation in a mouse bioassay. Forty-five strains were obtained and 39 genotypes could be described via 15-microsatellite genotyping, with a predominance of the autochthonous African lineage Africa 1 (36/39). The remaining genotypes were Africa 4 variant TUB2 (1/39) and two identical isolates (clone) of Type III (2/39). No difference in terms of genotype distribution between inland and coastal sampling sites was found. In particular, contrarily to what has been described in Senegal, no type II (mostly present in Europe) was isolated in poultry from coastal cities. This result seems to refute a possible role of European maritime trade in Benin despite it was one of the most important hubs during the slave trade period. However, the presence of the Africa 1 genotype in Brazil, predominant in Benin, and genetic analyses suggest that the triangular trade was a route for the intercontinental dissemination of genetic strains from Africa to South America. This supports the possibility of contamination in humans and animals with potentially imported virulent strains. The parasite Toxoplasma gondii is a worldwide-distributed pathogen, able to infect all warm-blooded animals. There are important differences in the clinical expression of the infection in direct relation with the parasite genetic profile. In some regions, the geographical structuration of its genetic diversity points towards a crucial role of human activities in some lineages introduction or sorting. Benin is a West African country with a history of extensive transcontinental exchanges. Our genetic study of Toxoplasma in Benin shows a surprisingly homogeneous and autochthonous diversity, which contrasts with previous studies from other West and Central African countries. In Benin, the absence of European Toxoplasma lineages may be explained by the extreme rarity of the house mouse (Mus musculus), a host species that was previously described as highly susceptible to the mouse-virulent African strains. Might Benin be the origin region for the Africa 1 lineage, our results suggest that Guinean Gulf coasts may be a starting point of this lineage towards South America, especially Brazil, during the slave trade. As a whole, the present study provides further insights into the recent evolutionary history of Toxoplasma gondii and its consequences on human and animal health.
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Affiliation(s)
- Azra Hamidović
- INSERM, Univ. Limoges, CHU Limoges, IRD, U1094, Tropical Neuroepidemiology, Institute of Epidemiology and Tropical Neurology, GEIST, Limoges, France
- * E-mail:
| | - Jonas Raoul Etougbétché
- UAC, EPAC, Laboratoire de Recherche en Biologie Appliquée, Unité de Recherche sur les Invasions Biologiques, Cotonou, Benin
| | | | - Lokman Galal
- INSERM, Univ. Limoges, CHU Limoges, IRD, U1094, Tropical Neuroepidemiology, Institute of Epidemiology and Tropical Neurology, GEIST, Limoges, France
| | - Gauthier Dobigny
- UAC, EPAC, Laboratoire de Recherche en Biologie Appliquée, Unité de Recherche sur les Invasions Biologiques, Cotonou, Benin
- Centre de Biologie pour la Gestion des Populations, IRD, CIRAD, INRA, Montpellier SupAgro, MUSE, Montpellier, France
| | - Gualbert Houémènou
- UAC, EPAC, Laboratoire de Recherche en Biologie Appliquée, Unité de Recherche sur les Invasions Biologiques, Cotonou, Benin
| | - Honoré Da Zoclanclounon
- Laboratoire d’Expérimentation Animale, Unité de Biologie Humaine, Faculté des Sciences de la Santé, Université d’Abomey-Calavi, Cotonou, Benin
| | - Richard Amagbégnon
- Laboratoire de biologie médicale, Centre Hospitalo-Universitaire de la Mère et de l’Enfant Lagune (CHU-MEL), Cotonou, Bénin
| | - Anatole Laleye
- Laboratoire d’Expérimentation Animale, Unité de Biologie Humaine, Faculté des Sciences de la Santé, Université d’Abomey-Calavi, Cotonou, Benin
| | - Nadine Fievet
- UMR216-MERIT, IRD, Université Paris-5, Sorbonne Paris Cité, Paris, France; Centre d’Etude et de Recherche sur le Paludisme Associé à la Grossesse et à l’Enfance (CERPAGE), Cotonou, Bénin
| | - Sylvain Piry
- Centre de Biologie pour la Gestion des Populations, IRD, CIRAD, INRA, Montpellier SupAgro, MUSE, Montpellier, France
| | - Karine Berthier
- Centre de Biologie pour la Gestion des Populations, IRD, CIRAD, INRA, Montpellier SupAgro, MUSE, Montpellier, France
| | - Hilda Fátima Jesus Pena
- Department of Preventive Veterinary Medicine and Animal Health, Faculty of Veterinary Medicine, University of São Paulo, São Paulo, Brazil
| | - Marie-Laure Dardé
- INSERM, Univ. Limoges, CHU Limoges, IRD, U1094, Tropical Neuroepidemiology, Institute of Epidemiology and Tropical Neurology, GEIST, Limoges, France
- Centre National de Référence Toxoplasmose/Toxoplasma Biological Resource Center, CHU Limoges, Limoges, France
| | - Aurélien Mercier
- INSERM, Univ. Limoges, CHU Limoges, IRD, U1094, Tropical Neuroepidemiology, Institute of Epidemiology and Tropical Neurology, GEIST, Limoges, France
- Centre National de Référence Toxoplasmose/Toxoplasma Biological Resource Center, CHU Limoges, Limoges, France
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11
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Etougbétché J, Houémènou G, Dossou HJ, Badou S, Gauthier P, Abdou Karim IY, Nicolas V, Dobigny G. Genetic diversity and origins of invasive black rats (Rattus rattus) in Benin, West Africa. JOURNAL OF VERTEBRATE BIOLOGY 2020. [DOI: 10.25225/jvb.20014] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/03/2022]
Affiliation(s)
- Jonas Etougbétché
- Ecole Polytechnique d'Abomey-Calavi, Laboratoire de Recherche en Biologie Appliquée, Unité de Recherche sur les Invasions Biologiques, Université d'Abomey-Calavi, Benin; e-mail: , , sylvestrebado
| | - Gualbert Houémènou
- Ecole Polytechnique d'Abomey-Calavi, Laboratoire de Recherche en Biologie Appliquée, Unité de Recherche sur les Invasions Biologiques, Université d'Abomey-Calavi, Benin; e-mail: , , sylvestrebado
| | - Henri-Joël Dossou
- Ecole Polytechnique d'Abomey-Calavi, Laboratoire de Recherche en Biologie Appliquée, Unité de Recherche sur les Invasions Biologiques, Université d'Abomey-Calavi, Benin; e-mail: , , sylvestrebado
| | - Sylvestre Badou
- Ecole Polytechnique d'Abomey-Calavi, Laboratoire de Recherche en Biologie Appliquée, Unité de Recherche sur les Invasions Biologiques, Université d'Abomey-Calavi, Benin; e-mail: , , sylvestrebado
| | - Philippe Gauthier
- Institut de Recherche pour le Développement, UMR CBGP IRD, INRA, Cirad, Institut SupAgro, Montpellier Université d'Excellence, France; e-mail: ;
| | - Issaka Youssao Abdou Karim
- Ecole Polytechnique d'Abomey-Calavi, Laboratoire de Biotechnologie Animale et de Technologie des Viandes, Université d'Abomey-Calavi, Benin; e-mail:
| | - Violaine Nicolas
- Institut de Systématique, Evolution, Biodiversité (ISYEB) Muséum national d'Histoire naturelle, CNRS, Sorbonne Université, EPHE, Université des Antilles, CP51, 57 rue Cuvier, 75005 Paris, France; e-mail:
| | - Gauthier Dobigny
- Ecole Polytechnique d'Abomey-Calavi, Laboratoire de Recherche en Biologie Appliquée, Unité de Recherche sur les Invasions Biologiques, Université d'Abomey-Calavi, Benin; e-mail: , , sylvestrebado
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