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Pandey A, Wojan C, Feuka A, Craft ME, Manlove K, Pepin KM. The influence of social and spatial processes on the epidemiology of environmentally transmitted pathogens in wildlife: implications for management. Philos Trans R Soc Lond B Biol Sci 2024; 379:20220532. [PMID: 39230447 PMCID: PMC11449208 DOI: 10.1098/rstb.2022.0532] [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: 02/09/2024] [Revised: 04/29/2024] [Accepted: 05/07/2024] [Indexed: 09/05/2024] Open
Abstract
Social and spatial structures of host populations play important roles in pathogen transmission. For environmentally transmitted pathogens, the host space use interacts with both the host social structure and the pathogen's environmental persistence (which determines the time-lag across which two hosts can transmit). Together, these factors shape the epidemiological dynamics of environmentally transmitted pathogens. While the importance of both social and spatial structures and environmental pathogen persistence has long been recognized in epidemiology, they are often considered separately. A better understanding of how these factors interact to determine disease dynamics is required for developing robust surveillance and management strategies. Here, we use a simple agent-based model where we vary host mobility (spatial), host gregariousness (social) and pathogen decay (environmental persistence), each from low to high levels to uncover how they affect epidemiological dynamics. By comparing epidemic peak, time to epidemic peak and final epidemic size, we show that longer infectious periods, higher group mobility, larger group size and longer pathogen persistence lead to larger, faster growing outbreaks, and explore how these processes interact to determine epidemiological outcomes such as the epidemic peak and the final epidemic size. We identify general principles that can be used for planning surveillance and control for wildlife host-pathogen systems with environmental transmission across a range of spatial behaviour, social structure and pathogen decay rates. This article is part of the theme issue 'The spatial-social interface: a theoretical and empirical integration'.
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Affiliation(s)
- Aakash Pandey
- Department of Fisheries and Wildlife, Michigan State University , East Lansing, MI 48824, USA
| | - Chris Wojan
- Department of Ecology, Evolution, and Behavior, University of Minnesota, Saint Paul , MN 55108, USA
| | - Abigail Feuka
- National Wildlife Research Center, USDA-APHIS, Fort Collins, CO 80521, USA
| | - Meggan E Craft
- Department of Ecology, Evolution, and Behavior, University of Minnesota, Saint Paul , MN 55108, USA
| | - Kezia Manlove
- Department of Wildland Resources and Ecology Center, Utah State University, 5200 Old Main Hill , Logan, UT 84322, USA
| | - Kim M Pepin
- National Wildlife Research Center, USDA-APHIS, Fort Collins, CO 80521, USA
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2
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Timm FCB, Campos FS, Janssen L, Dos Santos RN, Paredes-Galarza B, Stone NV, Oliveira MT, Gasparetto R, Müller NFD, Melgarejo ADS, Corrêa ML, Lozano LMV, Salvato RS, Godinho FMDS, Barcellos RB, Teixeira MADS, Riet-Correa G, Cerqueira VD, Bezerra Júnior PS, Franco AC, Roehe PM. The virome of bubaline (Bubalus bubalis) tonsils reveals an unreported bubaline polyomavirus. Braz J Microbiol 2024; 55:2893-2900. [PMID: 39014291 PMCID: PMC11405355 DOI: 10.1007/s42770-024-01449-0] [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: 12/26/2023] [Accepted: 06/17/2024] [Indexed: 07/18/2024] Open
Abstract
Water buffalo (Bubalus bubalis) farming is increasing in many regions of the world due to the species' ability to thrive in environments where bovine cattle would struggle. Despite water buffaloes being known for their resistance to diseases, there is a lack of data about the diversity of the microbiome of the species. In this study, we examined the virome diversity in palatine tonsils collected from animals from the island of Marajó, northern Pará state, Brazil, which harbors the largest bubaline flock in the country. Tonsil fragments from 60 clinically healthy bubalines were randomly selected from a sample of 293 animals. The samples were purified, extracted, and randomly amplified with phi29 DNA polymerase. After amplification, the products were purified and sequenced. Circular DNA viruses were predominant in the tonsils' virome. Sequences of genome segments representative of members of the genera Alphapolyomavirus (including a previously unreported bubaline polyomavirus genome) and Gemycircularvirus were identified, along with other not yet classified circular virus genomes. As the animals were clinically healthy at the time of sampling, such viruses likely constitute part of the normal tonsillar virome of water buffaloes inhabiting the Ilha do Marajó biome.
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Affiliation(s)
- Francine C B Timm
- Laboratório de Virologia, Departamento de Microbiologia, Imunologia e Parasitologia, Instituto de Ciências Básicas da Saúde, Universidade Federal do Rio Grande do Sul (UFRGS), Porto Alegre, Rio Grande do Sul, Brasil
| | - Fabrício Souza Campos
- Laboratório de Virologia, Departamento de Microbiologia, Imunologia e Parasitologia, Instituto de Ciências Básicas da Saúde, Universidade Federal do Rio Grande do Sul (UFRGS), Porto Alegre, Rio Grande do Sul, Brasil.
| | - Luis Janssen
- Laboratório de Baculovírus, Instituto de Ciências Biológicas, Universidade de Brasília (UnB), Brasília, Brasil
| | - Raíssa Nunes Dos Santos
- Laboratório de Virologia, Departamento de Microbiologia, Imunologia e Parasitologia, Instituto de Ciências Básicas da Saúde, Universidade Federal do Rio Grande do Sul (UFRGS), Porto Alegre, Rio Grande do Sul, Brasil
| | - Bruna Paredes-Galarza
- Laboratório de Virologia, Departamento de Microbiologia, Imunologia e Parasitologia, Instituto de Ciências Básicas da Saúde, Universidade Federal do Rio Grande do Sul (UFRGS), Porto Alegre, Rio Grande do Sul, Brasil
| | - Nicole Vieira Stone
- Laboratório de Virologia, Departamento de Microbiologia, Imunologia e Parasitologia, Instituto de Ciências Básicas da Saúde, Universidade Federal do Rio Grande do Sul (UFRGS), Porto Alegre, Rio Grande do Sul, Brasil
| | - Martha Trindade Oliveira
- Laboratório de Virologia, Departamento de Microbiologia, Imunologia e Parasitologia, Instituto de Ciências Básicas da Saúde, Universidade Federal do Rio Grande do Sul (UFRGS), Porto Alegre, Rio Grande do Sul, Brasil
| | - Raíssa Gasparetto
- Laboratório de Virologia, Departamento de Microbiologia, Imunologia e Parasitologia, Instituto de Ciências Básicas da Saúde, Universidade Federal do Rio Grande do Sul (UFRGS), Porto Alegre, Rio Grande do Sul, Brasil
| | - Nicolas Felipe Drum Müller
- Laboratório de Virologia, Departamento de Microbiologia, Imunologia e Parasitologia, Instituto de Ciências Básicas da Saúde, Universidade Federal do Rio Grande do Sul (UFRGS), Porto Alegre, Rio Grande do Sul, Brasil
| | - Alanis da Silva Melgarejo
- Laboratório de Virologia, Departamento de Microbiologia, Imunologia e Parasitologia, Instituto de Ciências Básicas da Saúde, Universidade Federal do Rio Grande do Sul (UFRGS), Porto Alegre, Rio Grande do Sul, Brasil
| | - Miguel Leonetti Corrêa
- Laboratório de Virologia, Departamento de Microbiologia, Imunologia e Parasitologia, Instituto de Ciências Básicas da Saúde, Universidade Federal do Rio Grande do Sul (UFRGS), Porto Alegre, Rio Grande do Sul, Brasil
| | - Lina Marcela Violet Lozano
- Laboratório de Virologia, Departamento de Microbiologia, Imunologia e Parasitologia, Instituto de Ciências Básicas da Saúde, Universidade Federal do Rio Grande do Sul (UFRGS), Porto Alegre, Rio Grande do Sul, Brasil
| | - Richard Steiner Salvato
- Centro de Desenvolvimento Científico e Tecnológico (CDCT), Centro Estadual de Vigilância em Saúde (CEVS) da Secretaria Estadual da Saúde do Rio Grande do Sul (SESRS), Porto Alegre, Rio Grande do Sul, Brasil
| | - Fernanda Marques de Souza Godinho
- Centro de Desenvolvimento Científico e Tecnológico (CDCT), Centro Estadual de Vigilância em Saúde (CEVS) da Secretaria Estadual da Saúde do Rio Grande do Sul (SESRS), Porto Alegre, Rio Grande do Sul, Brasil
| | - Regina Bones Barcellos
- Centro de Desenvolvimento Científico e Tecnológico (CDCT), Centro Estadual de Vigilância em Saúde (CEVS) da Secretaria Estadual da Saúde do Rio Grande do Sul (SESRS), Porto Alegre, Rio Grande do Sul, Brasil
| | | | - Gabriela Riet-Correa
- Laboratório de Patologia Animal, Instituto de Medicina Veterinária, Universidade Federal do Pará (UFPA), Castanhal, Pará, Brasil
| | - Valíria Duarte Cerqueira
- Laboratório de Patologia Animal, Instituto de Medicina Veterinária, Universidade Federal do Pará (UFPA), Castanhal, Pará, Brasil
| | - Pedro Soares Bezerra Júnior
- Laboratório de Patologia Animal, Instituto de Medicina Veterinária, Universidade Federal do Pará (UFPA), Castanhal, Pará, Brasil
| | - Ana Cláudia Franco
- Laboratório de Virologia, Departamento de Microbiologia, Imunologia e Parasitologia, Instituto de Ciências Básicas da Saúde, Universidade Federal do Rio Grande do Sul (UFRGS), Porto Alegre, Rio Grande do Sul, Brasil
| | - Paulo Michel Roehe
- Laboratório de Virologia, Departamento de Microbiologia, Imunologia e Parasitologia, Instituto de Ciências Básicas da Saúde, Universidade Federal do Rio Grande do Sul (UFRGS), Porto Alegre, Rio Grande do Sul, Brasil.
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3
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Cook JD, Williams DM, Porter WF, Christensen SA. Improved predictions and forecasts of chronic wasting disease occurrence using multiple mechanism dynamic occupancy modeling. J Wildl Manage 2022. [DOI: 10.1002/jwmg.22296] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
Affiliation(s)
- Jonathan D. Cook
- Michigan State University 480 Wilson Road East Lansing MI 48823 USA
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Tober AV, Govender D, Russo IRM, Cable J. The microscopic five of the big five: Managing zoonotic diseases within and beyond African wildlife protected areas. ADVANCES IN PARASITOLOGY 2022; 117:1-46. [PMID: 35878948 DOI: 10.1016/bs.apar.2022.05.001] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/26/2023]
Abstract
African protected areas strive to conserve the continent's great biodiversity with a targeted focus on the flagship 'Big Five' megafauna. Though often not considered, this biodiversity protection also extends to the lesser-known microbes and parasites that are maintained in these diverse ecosystems, often in a silent and endemically stable state. Climate and anthropogenic change, and associated diversity loss, however, are altering these dynamics leading to shifts in ecological interactions and pathogen spill over into new niches and hosts. As many African protected areas are bordered by game and livestock farms, as well as villages, they provide an ideal study system to assess infection dynamics at the human-livestock-wildlife interface. Here we review five zoonotic, multi-host diseases (bovine tuberculosis, brucellosis, Rift Valley fever, schistosomiasis and cryptosporidiosis)-the 'Microscopic Five'-and discuss the biotic and abiotic drivers of parasite transmission using the iconic Kruger National Park, South Africa, as a case study. We identify knowledge gaps regarding the impact of the 'Microscopic Five' on wildlife within parks and highlight the need for more empirical data, particularly for neglected (schistosomiasis) and newly emerging (cryptosporidiosis) diseases, as well as zoonotic disease risk from the rising bush meat trade and game farm industry. As protected areas strive to become further embedded in the socio-economic systems that surround them, providing benefits to local communities, One Health approaches can help maintain the ecological integrity of ecosystems, while protecting local communities and economies from the negative impacts of disease.
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Affiliation(s)
- Anya V Tober
- School of Biosciences, Cardiff University, Cardiff, Wales, United Kingdom.
| | - Danny Govender
- SANParks, Scientific Services, Savanna and Grassland Research Unit, Pretoria, South Africa; Department of Paraclinical Sciences, University of Pretoria, Onderstepoort, South Africa
| | - Isa-Rita M Russo
- School of Biosciences, Cardiff University, Cardiff, Wales, United Kingdom
| | - Jo Cable
- School of Biosciences, Cardiff University, Cardiff, Wales, United Kingdom
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Gerken KN, LaBeaud AD, Mandi H, L’Azou Jackson M, Breugelmans JG, King CH. Paving the way for human vaccination against Rift Valley fever virus: A systematic literature review of RVFV epidemiology from 1999 to 2021. PLoS Negl Trop Dis 2022; 16:e0009852. [PMID: 35073355 PMCID: PMC8812886 DOI: 10.1371/journal.pntd.0009852] [Citation(s) in RCA: 4] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/26/2021] [Revised: 02/03/2022] [Accepted: 12/22/2021] [Indexed: 11/19/2022] Open
Abstract
BACKGROUND Rift Valley fever virus (RVFV) is a lethal threat to humans and livestock in many parts of Africa, the Arabian Peninsula, and the Indian Ocean. This systematic review's objective was to consolidate understanding of RVFV epidemiology during 1999-2021 and highlight knowledge gaps relevant to plans for human vaccine trials. METHODOLOGY/PRINCIPAL FINDINGS The review is registered with PROSPERO (CRD42020221622). Reports of RVFV infection or exposure among humans, animals, and/or vectors in Africa, the Arabian Peninsula, and the Indian Ocean during the period January 1999 to June 2021 were eligible for inclusion. Online databases were searched for publications, and supplemental materials were recovered from official reports and research colleagues. Exposures were classified into five groups: 1) acute human RVF cases, 2) acute animal cases, 3) human RVFV sero-surveys, 4) animal sero-surveys, and 5) arthropod infections. Human risk factors, circulating RVFV lineages, and surveillance methods were also tabulated. In meta-analysis of risks, summary odds ratios were computed using random-effects modeling. 1104 unique human or animal RVFV transmission events were reported in 39 countries during 1999-2021. Outbreaks among humans or animals occurred at rates of 5.8/year and 12.4/year, respectively, with Mauritania, Madagascar, Kenya, South Africa, and Sudan having the most human outbreak years. Men had greater odds of RVFV infection than women, and animal contact, butchering, milking, and handling aborted material were significantly associated with greater odds of exposure. Animal infection risk was linked to location, proximity to water, and exposure to other herds or wildlife. RVFV was detected in a variety of mosquito vectors during interepidemic periods, confirming ongoing transmission. CONCLUSIONS/SIGNIFICANCE With broad variability in surveillance, case finding, survey design, and RVFV case confirmation, combined with uncertainty about populations-at-risk, there were inconsistent results from location to location. However, it was evident that RVFV transmission is expanding its range and frequency. Gaps assessment indicated the need to harmonize human and animal surveillance and improve diagnostics and genotyping. Given the frequency of RVFV outbreaks, human vaccination has strong potential to mitigate the impact of this now widely endemic disease.
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Affiliation(s)
- Keli N. Gerken
- Division of Pediatric Infectious Diseases, Department of Pediatrics, Stanford University School of Medicine, Stanford, California, United States of America
| | - A. Desirée LaBeaud
- Division of Pediatric Infectious Diseases, Department of Pediatrics, Stanford University School of Medicine, Stanford, California, United States of America
| | - Henshaw Mandi
- Coalition for Epidemic Preparedness Innovations (CEPI), Oslo, Norway
| | | | | | - Charles H. King
- Center for Global Health and Diseases, Department of Pathology, Case Western Reserve University School of Medicine, Cleveland, Ohio, United States of America
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Wielgus E, Caron A, Bennitt E, De Garine‐Wichatitsky M, Cain B, Fritz H, Miguel E, Cornélis D, Chamaillé‐Jammes S. Inter‐Group Social Behavior, Contact Patterns and Risk for Pathogen Transmission in Cape Buffalo Populations. J Wildl Manage 2021. [DOI: 10.1002/jwmg.22116] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
Affiliation(s)
- Elodie Wielgus
- Department of Natural Sciences Manchester Metropolitan University, All Saints Manchester M15 6BH UK
| | - Alexandre Caron
- Faculdade de Veterinária Universidade Eduardo Mondlane Av. De Moçambique, CP 257 Maputo Mozambique
| | - Emily Bennitt
- Okavango Research Institute University of Botswana Shorobe Road Maun Botswana
| | | | - Bradley Cain
- Department of Natural Sciences Manchester Metropolitan University, All Saints Manchester M15 6BH UK
| | - Herve Fritz
- REHABS, CNRS ‐ Université Lyon 1 ‐ Nelson Mandela University International Research Laboratory George Campus, Madiba Drive George South Africa
| | - Eve Miguel
- Maladies Infectieuses et Vecteurs: Ecologie, Génétique, Evolution et Contrôle Institut de Recherche pour le Développement 911 Avenue Agropolis, 34394 Montpellier cedex 5 France
| | - Daniel Cornélis
- CIRAD, Forêts et Sociétés, F‐34398 Montpellier, France; Forêts et Sociétés Université de Montpellier CIRAD, 34090 Montpellier France
| | - Simon Chamaillé‐Jammes
- CEFE, University of Montpellier, CNRS, EPHE, IRD University Paul Valéry Montpellier 3 Montpellier France
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Woodburn DB, Steyl J, Du Plessis EC, Last RD, Reininghaus B, Mitchell EP. Pathological findings in African buffaloes (Syncerus caffer) in South Africa. J S Afr Vet Assoc 2021; 92:e1-e11. [PMID: 34476957 PMCID: PMC8424707 DOI: 10.4102/jsava.v92i0.2117] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/18/2020] [Revised: 06/04/2021] [Accepted: 06/15/2021] [Indexed: 11/05/2022] Open
Abstract
The African buffalo (Syncerus caffer) is an iconic species of South African megafauna. As the farmed buffalo population expands, the potential impacts on population health and disease transmission warrant investigation. A retrospective study of skin biopsy and necropsy samples from 429 animals was performed to assess the spectrum of conditions seen in buffaloes in South Africa. Determination of the cause of death (or euthanasia) could not be made in 33.1% (136/411) of the necropsy cases submitted due to autolysis or the absence of significant lesions in the samples submitted. Infectious and parasitic diseases accounted for 53.5% (147/275) of adult fatal cases and non-infectious conditions accounted for 34.9% (96/275). Abortions and neonatal deaths made up 11.6% (32/275) of necropsy cases. Rift Valley fever, bovine viral diarrhoea, malignant catarrhal fever, tuberculosis, bacterial pneumonia, anaesthetic deaths, cachexia and hepatotoxic lesions were the most common causes of death. The range of infectious, parasitic and non-infectious diseases to which African buffaloes were susceptible was largely similar to diseases in domestic cattle which supports concerns regarding disease transmission between the two species. The similarity between diseases experienced in both species will assist wildlife veterinarians in the diagnosis and treatment of diseases in captive African buffaloes. The present study likely does not represent accurate disease prevalence data within the source population of buffaloes, and diseases such as anthrax, brucellosis and foot and mouth disease are under-represented in this study. Hepatic ductal plate abnormalities and haemorrhagic septicaemia have not, to our knowledge, been previously reported in African buffaloes.
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Affiliation(s)
- Daniel B Woodburn
- Department of Pathobiology, Zoological Pathology Program, University of Illinois, Illinois.
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Tao Y, Hite JL, Lafferty KD, Earn DJD, Bharti N. Transient disease dynamics across ecological scales. THEOR ECOL-NETH 2021; 14:625-640. [PMID: 34075317 PMCID: PMC8156581 DOI: 10.1007/s12080-021-00514-w] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/08/2020] [Accepted: 05/04/2021] [Indexed: 11/25/2022]
Abstract
Analyses of transient dynamics are critical to understanding infectious disease transmission and persistence. Identifying and predicting transients across scales, from within-host to community-level patterns, plays an important role in combating ongoing epidemics and mitigating the risk of future outbreaks. Moreover, greater emphases on non-asymptotic processes will enable timely evaluations of wildlife and human diseases and lead to improved surveillance efforts, preventive responses, and intervention strategies. Here, we explore the contributions of transient analyses in recent models spanning the fields of epidemiology, movement ecology, and parasitology. In addition to their roles in predicting epidemic patterns and endemic outbreaks, we explore transients in the contexts of pathogen transmission, resistance, and avoidance at various scales of the ecological hierarchy. Examples illustrate how (i) transient movement dynamics at the individual host level can modify opportunities for transmission events over time; (ii) within-host energetic processes often lead to transient dynamics in immunity, pathogen load, and transmission potential; (iii) transient connectivity between discrete populations in response to environmental factors and outbreak dynamics can affect disease spread across spatial networks; and (iv) increasing species richness in a community can provide transient protection to individuals against infection. Ultimately, we suggest that transient analyses offer deeper insights and raise new, interdisciplinary questions for disease research, consequently broadening the applications of dynamical models for outbreak preparedness and management. SUPPLEMENTARY INFORMATION The online version contains supplementary material available at 10.1007/s12080-021-00514-w.
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Affiliation(s)
- Yun Tao
- Intelligence Community Postdoctoral Research Fellowship Program, Department of Ecology, Evolution and Marine Biology, University of California, Santa Barbara, CA 93106 USA
| | - Jessica L. Hite
- School of Veterinary Medicine, Department of Pathobiological Sciences, University of Wisconsin, Madison, WI 53706 USA
| | - Kevin D. Lafferty
- Western Ecological Research Center at UCSB Marine Science Institute, U.S. Geological Survey, CA 93106 Santa Barbara, USA
| | - David J. D. Earn
- Department of Mathematics and Statistics, McMaster University, Hamilton, ON L8S 4K1 Canada
| | - Nita Bharti
- Department of Biology Center for Infectious Disease Dynamics, Penn State University, University Park, PA 16802 USA
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Simpson G, Thompson PN, Saegerman C, Marcotty T, Letesson JJ, de Bolle X, Godfroid J. Brucellosis in wildlife in Africa: a systematic review and meta-analysis. Sci Rep 2021; 11:5960. [PMID: 33727580 PMCID: PMC7966391 DOI: 10.1038/s41598-021-85441-w] [Citation(s) in RCA: 13] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/24/2020] [Accepted: 02/28/2021] [Indexed: 01/31/2023] Open
Abstract
This study aimed to consolidate current knowledge of wildlife brucellosis in Africa and to analyse available predictors of infection. The Preferred Reporting Items for Systematic Reviews and Meta-Analyses guidelines were followed. Information on species, test used, test results, area, rainfall, livestock and wildlife contact and year of study were extracted. This systematic review revealed 42 prevalence studies, nine disease control articles and six articles on epidemiology. Brucella abortus, Brucella melitensis, Brucella inopinata and Brucella suis were reported in wildlife. The prevalence studies revealed serological evidence of brucellosis in buffalo, antelope (positive in 14/28 species), carnivores (4/12) and other species (7/20) over the last five decades. Buffalo populations were more likely to be infected and had a higher seroprevalence than other species; the pooled seroprevalence was 13.7% (95% CI 10.3-17.3%) in buffalo, 7.1% (95% CI 1.1-15.5%) in carnivores and 2.1% (95% CI 0.1-4.9%) in antelope. Wildlife in high rainfall areas (≥ 800 mm) were more likely to be infected, and infected populations showed higher seroprevalence in high rainfall areas and in studies published after 2000. Domestic animal contact was associated with increased seroprevalence in antelope and carnivore species, but not in buffalo, supporting the hypothesis that buffalo may be a reservoir species.
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Affiliation(s)
- Gregory Simpson
- Department of Production Animal Studies, Faculty of Veterinary Science, University of Pretoria, Onderstepoort, 0110, South Africa.
- Centre for Veterinary Wildlife Studies, Faculty of Veterinary Science, University of Pretoria, Pretoria, South Africa.
| | - Peter N Thompson
- Department of Production Animal Studies, Faculty of Veterinary Science, University of Pretoria, Onderstepoort, 0110, South Africa
- Centre for Veterinary Wildlife Studies, Faculty of Veterinary Science, University of Pretoria, Pretoria, South Africa
| | - Claude Saegerman
- Department of Infectious and Parasitic Diseases, Fundamental and Applied Research for Animal and Health (FARAH) Centre, Faculty of Veterinary Medicine, University of Liège, Liège, Belgium
| | - Tanguy Marcotty
- Faculty of Science, University of Namur, Namur, Belgium
- Department of Veterinary Tropical Diseases, Faculty of Veterinary Science, University of Pretoria, Pretoria, South Africa
| | | | | | - Jacques Godfroid
- Department of Veterinary Tropical Diseases, Faculty of Veterinary Science, University of Pretoria, Pretoria, South Africa
- Department of Arctic and Marine Biology, Faculty of Biosciences, Fisheries and Economics, UiT, The Arctic University of Norway, Tromsø, Norway
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Aruho R, MacLeod ET, Manirakiza L, Rwego IB. A serological survey of brucellosis in wildlife in four major National Parks of Uganda. BMC Vet Res 2021; 17:95. [PMID: 33648507 PMCID: PMC7923651 DOI: 10.1186/s12917-021-02782-4] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/25/2020] [Accepted: 01/31/2021] [Indexed: 11/13/2022] Open
Abstract
Background Brucellosis is a contagious zoonotic disease of great public health and economic significance especially in developing countries. The disease affects humans and several species of livestock and wildlife. Studies on Brucellosis in wildlife in Uganda have been limited to single populations particularly in Queen Elizabeth National Park. This study aimed at estimating the percentage of positive samples of Brucella spp. in wildlife in four major national parks of Uganda. This was a retrospective survey which utilized archived samples collected from wildlife during the annual disease surveillance activities between 2013 and 2017. Results A total of 241 samples from seven species namely African buffalo (Syncerus caffer, n = 109), African elephant (Loxodonta africana, n = 22), giraffe (Giraffa camelopardalis rothschildi, n = 41), Uganda kob (Kobus kob thomasi, n = 36), lion (Panthera leo, n = 6), plain zebra (Equus quagga, n = 25), and bushbuck (Tragelaphus scriptus, n = 2), were tested for antibodies using the Rose Bengal Plate Test. The overall percentage of positive samples in the four national parks was 31.1% (75/241; 95% CI: 25.6–37.2). Kidepo Valley National Park had a significantly higher percentage of positive samples of 55.9% (19/34; 95% CI: 39.5–71.1) compared to other sampled national parks (p < 0.05). Lions had significantly higher percentage of positive samples at 66.7% (4/6) than African buffalo at 48.6% (53/109, p < 0.0001). There were no antibodies for Brucella spp. detected in African elephant and bushbuck. Conclusion This study shows variations in percentage of positive samples with Brucella spp. between species and across national parks and notably a high percentage with Brucella spp. in wildlife in Uganda than that recorded elsewhere in sub-Saharan region of Africa. Potential for transmission to other wildlife and spill over to livestock is high especially in national parks with high livestock-wildlife interaction.
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Affiliation(s)
- Robert Aruho
- Uganda Wildlife Authority (UWA) Headquarters, Plot 7, Kira Road, Kamwokya, P. O Box 3530, Kampala, Uganda. .,Division of Infection and Pathway Medicine, 1 George Square, Biomedical Sciences, Edinburgh Medical School, College of Medicine and Veterinary Medicine, The University of Edinburgh, Edinburgh, EH8 9JZ, UK.
| | - Ewan T MacLeod
- Division of Infection and Pathway Medicine, 1 George Square, Biomedical Sciences, Edinburgh Medical School, College of Medicine and Veterinary Medicine, The University of Edinburgh, Edinburgh, EH8 9JZ, UK
| | - Leonard Manirakiza
- National Pharmacovigilance Centre, Uganda National Drug Authority, Ministry of Health, Kampala, Uganda
| | - Innocent B Rwego
- Department of Biosecurity Ecosystem and Veterinary Public Health, Africa One Health University Network (AFROHUN), College of Veterinary Medicine, Animal Resources and Biosecurity (COVAB), Makerere University, Box 7062, Kampala, Uganda. .,Department of Veterinary Population Medicine, One Health Division, College of Veterinary Medicine, University of Minnesota, St. Paul, MN, USA.
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Dwyer RA, Witte C, Buss P, Goosen WJ, Miller M. Epidemiology of Tuberculosis in Multi-Host Wildlife Systems: Implications for Black ( Diceros bicornis) and White ( Ceratotherium simum) Rhinoceros. Front Vet Sci 2020; 7:580476. [PMID: 33330701 PMCID: PMC7672123 DOI: 10.3389/fvets.2020.580476] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/06/2020] [Accepted: 10/05/2020] [Indexed: 11/13/2022] Open
Abstract
Cases of tuberculosis (TB) resulting from infection with Mycobacterium tuberculosis complex (MTBC) have been recorded in captive white (Ceratotherium simum) and black (Diceros bicornis) rhinoceros. More recently, cases have been documented in free-ranging populations of both species in bovine tuberculosis (bTB) endemic areas of South Africa. There is limited information on risk factors and transmission patterns for MTBC infections in African rhinoceros, however, extrapolation from literature on MTBC infections in other species and multi-host systems provides a foundation for understanding TB epidemiology in rhinoceros species. Current diagnostic tests include blood-based immunoassays but distinguishing between subclinical and active infections remains challenging due to the lack of diagnostic techniques. In other species, demographic risk factors for MTBC infection include sex and age, where males and adults are generally at higher risk than females and younger individuals. Limited available historical information reflects similar age- and sex-associated patterns for TB in captive black and white rhinoceros, with more reports of MTBC-associated disease in black rhinoceros than in white rhinoceros. The degree of MTBC exposure in susceptible wildlife depends on their level of interaction, either directly with other infected individuals or indirectly through MTBC contaminated environments, which is dependent on the presence and abundance of infected reservoir hosts and the amount of MTBC shed in their excreta. Captive African rhinoceros have shown evidence of MTBC shedding, and although infection levels are low in free-ranging rhinoceros, there is a risk for intraspecies transmission. Free-ranging rhinoceros in bTB endemic areas may be exposed to MTBC from other infected host species, such as the African buffalo (Syncerus caffer) and greater kudu (Tragelaphus strepsiceros), through shared environmental niches, and resource co-utilization. This review describes current knowledge and information gaps regarding the epidemiology of TB in African rhinoceros.
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Affiliation(s)
- Rebecca A Dwyer
- Division of Molecular Biology and Human Genetics, Faculty of Medicine and Health Sciences, Department of Science and Innovation - National Research Foundation Centre of Excellence for Biomedical Tuberculosis Research, South African Medical Research Council Centre for Tuberculosis Research, Stellenbosch University, Cape Town, South Africa
| | - Carmel Witte
- Disease Investigations, San Diego Zoo Global, San Diego, CA, United States
| | - Peter Buss
- Veterinary Wildlife Services, Kruger National Park, Skukuza, South Africa
| | - Wynand J Goosen
- Division of Molecular Biology and Human Genetics, Faculty of Medicine and Health Sciences, Department of Science and Innovation - National Research Foundation Centre of Excellence for Biomedical Tuberculosis Research, South African Medical Research Council Centre for Tuberculosis Research, Stellenbosch University, Cape Town, South Africa
| | - Michele Miller
- Division of Molecular Biology and Human Genetics, Faculty of Medicine and Health Sciences, Department of Science and Innovation - National Research Foundation Centre of Excellence for Biomedical Tuberculosis Research, South African Medical Research Council Centre for Tuberculosis Research, Stellenbosch University, Cape Town, South Africa
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12
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Ndengu M, Matope G, Tivapasi M, Pfukenyi DM, Cetre-Sossah C, De Garine-Wichatitsky M. Seroprevalence and associated risk factors of Rift Valley fever in cattle and selected wildlife species at the livestock/wildlife interface areas of Gonarezhou National Park, Zimbabwe. ACTA ACUST UNITED AC 2020; 87:e1-e7. [PMID: 32370521 PMCID: PMC7203192 DOI: 10.4102/ojvr.v87i1.1731] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/24/2019] [Revised: 07/05/2019] [Accepted: 07/17/2019] [Indexed: 12/18/2022]
Abstract
A study was conducted to investigate the seroprevalence and associated risk factors of Rift Valley fever (RVF) infection in cattle and some selected wildlife species at selected interface areas at the periphery of the Great Limpopo Transfrontier Conservation Area in Zimbabwe. Three study sites were selected based on the type of livestock–wildlife interface: porous livestock–wildlife interface (unrestricted); non-porous livestock–wildlife interface (restricted by fencing) and livestock–wildlife non-interface (totally absent contact or control). Sera were collected from cattle aged ≥ 2 years representing both female and intact male. Sera were also collected from selected wild ungulates from Mabalauta (porous interface) and Chipinda Pools (non-interface) areas of the Gonarezhou National Park. Sera were tested for antibodies to Rift Valley fever virus (RVFV) using a competitive enzyme-linked immunosorbent assay (ELISA) test. AX2 test was used to assess differences between categories, and p < 0.05 was considered as significant. In cattle, the overall seroprevalence was 1.7% (17/1011) (95% confidence interval [CI]: 1.01–2.7). The porous interface recorded a seroprevalence of 2.3% (95% CI: 1.2–4.3), the non-porous interface recorded a prevalence of 1.8% (95% CI: 0.7–4.3) and the non-interface area recorded a seroprevalence of 0.4% (955 CI: 0.02–2.5), but the difference in seroprevalence according to site was not significant (p > 0.05). All impala and kudu samples tested negative. The overall seroprevalence in buffaloes was 11.7% (95% CI: 6.6–19.5), and there was no significant (p = 0.38) difference between the sites (Mabalauta, 4.4% [95% CI: 0.2–24] vs. Chipinda, 13.6% [95% CI: 7.6–23]). The overall seroprevalence in buffaloes (11.7%, 13/111) was significantly (p < 0.0001) higher than in cattle (1.7%, 17/1011). The results established the presence of RVFV in cattle and selected wildlife and that sylvatic infections may be present in buffalo populations. Further studies are required to investigate if the virus is circulating between cattle and wildlife.
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Affiliation(s)
- Masimba Ndengu
- Department of Clinical Veterinary Studies, Faculty of Veterinary Science, University of Zimbabwe, Harare.
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13
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Owen‐Smith N, Hopcraft G, Morrison T, Chamaillé‐Jammes S, Hetem R, Bennitt E, Van Langevelde F. Movement ecology of large herbivores in African savannas: current knowledge and gaps. Mamm Rev 2020. [DOI: 10.1111/mam.12193] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/20/2022]
Affiliation(s)
- Norman Owen‐Smith
- Centre for African Ecology School of Animal, Plant and Environmental Sciences University of the Witwatersrand Wits 2050 South Africa
| | - Grant Hopcraft
- Institute of Biodiversity, Animal Health and Comparative Medicine University of Glasgow Glasgow G12 8QQ UK
| | - Thomas Morrison
- Institute of Biodiversity, Animal Health and Comparative Medicine University of Glasgow Glasgow G12 8QQ UK
| | | | - Robyn Hetem
- School of Animal, Plant and Environmental Sciences University of the Witwatersrand Wits 2050 South Africa
| | - Emily Bennitt
- Okavango Research Institute University of Botswana Maun Botswana
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14
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Britton A, Caron A, Bedane B. Progress to Control and Eradication of Peste des Petits Ruminants in the Southern African Development Community Region. Front Vet Sci 2019; 6:343. [PMID: 31681803 PMCID: PMC6803435 DOI: 10.3389/fvets.2019.00343] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/17/2019] [Accepted: 09/23/2019] [Indexed: 11/25/2022] Open
Abstract
In southern Africa, small ruminants are an important source of nutrition and income to resource-poor small holder farmers. After spreading from West to Central and Eastern Africa, peste des petits ruminants (PPR) emerged in the United Republic of Tanzania in 2008 and has since been reported in Angola, the Democratic Republic of the Congo, and the Comoros. The disease can cause considerable morbidity and mortality in naïve sheep and goat populations and severely impact rural livelihoods, particularly those of women. Gaps in the knowledge of PPR epidemiology still exist, particularly around the role of small-ruminant movement and the role of the abundant wildlife in southern Africa. The capacity of veterinary services to undertake surveillance and control PPR is heterogeneous within the region, with vaccination being limited. The Pan African strategy for the control and eradication of PPR mirrors the Global Strategy and provides the framework for the Southern African Development Community (SADC) region to meet the 2030 goal of eradication. Five countries and one zone within Namibia are officially PPR free according to OIE Standards. Most countries have developed national strategies for the control and eradication of PPR. To strengthen national and regional PPR eradication programme goals, there is a need for a regional risk-based surveillance adapted to infected, high-risk and lower-risk countries that will enable targeted and efficient control, rapid response to incursions and prevention of spread as well as improved preparedness. Continued international and national support will be necessary including laboratory diagnostics and enhancing surveillance capacity to prevent further spread southwards on the continent.
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Affiliation(s)
| | - Alexandre Caron
- ASTRE, Uni Montpellier, CIRAD, INRA, Montpellier, France
- Faculdade de Veterinaria, Universidade Eduardo Mondlane, Maputo, Mozambique
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15
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Guerrini L, Pfukenyi DM, Etter E, Bouyer J, Njagu C, Ndhlovu F, Bourgarel M, de Garine-Wichatitsky M, Foggin C, Grosbois V, Caron A. Spatial and seasonal patterns of FMD primary outbreaks in cattle in Zimbabwe between 1931 and 2016. Vet Res 2019; 50:73. [PMID: 31551078 PMCID: PMC6760110 DOI: 10.1186/s13567-019-0690-7] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/06/2019] [Accepted: 08/27/2019] [Indexed: 01/12/2023] Open
Abstract
Foot and mouth disease (FMD) is an important livestock disease impacting mainly intensive production systems. In southern Africa, the FMD virus is maintained in wildlife and its control is therefore complicated. However, FMD control is an important task to allow countries access to lucrative foreign meat market and veterinary services implement drastic control measures on livestock populations living in the periphery of protected areas, negatively impacting local small-scale livestock producers. This study investigated FMD primary outbreak data in Zimbabwe from 1931 to 2016 to describe the spatio-temporal distribution of FMD outbreaks and their potential drivers. The results suggest that: (i) FMD outbreaks were not randomly distributed in space across Zimbabwe but are clustered in the Southeast Lowveld (SEL); (ii) the proximity of protected areas with African buffalos was potentially responsible for primary FMD outbreaks in cattle; (iii) rainfall per se was not associated with FMD outbreaks, but seasons impacted the temporal occurrence of FMD outbreaks across regions; (iv) the frequency of FMD outbreaks increased during periods of major socio-economic and political crisis. The differences between the spatial clusters and other areas in Zimbabwe presenting similar buffalo/cattle interfaces but with fewer FMD outbreaks can be interpreted in light of the recent better understanding of wildlife/livestock interactions in these areas. The types of wildlife/livestock interfaces are hypothesized to be the key drivers of contacts between wildlife and livestock, triggering a risk of FMD inter-species spillover. The management of wildlife/livestock interfaces is therefore crucial for the control of FMD in southern Africa.
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Affiliation(s)
- Laure Guerrini
- ASTRE, CIRAD, INRA, Université de Montpellier, Montpellier, France
- CIRAD, RP-PCP, UMR ASTRE, Harare, Zimbabwe
| | - Davies Mubika Pfukenyi
- Department of Clinical Veterinary Studies, Faculty of Veterinary Science, University of Zimbabwe, Harare, Zimbabwe
| | - Eric Etter
- ASTRE, CIRAD, INRA, Université de Montpellier, Montpellier, France
- Epidemiology Section, Department of Production Animals Studies, Faculty of Veterinary Science, University of Pretoria, Pretoria, South Africa
| | - Jérémy Bouyer
- ASTRE, CIRAD, INRA, Université de Montpellier, Montpellier, France
| | | | | | - Mathieu Bourgarel
- ASTRE, CIRAD, INRA, Université de Montpellier, Montpellier, France
- CIRAD, RP-PCP, UMR ASTRE, Harare, Zimbabwe
| | - Michel de Garine-Wichatitsky
- ASTRE, CIRAD, INRA, Université de Montpellier, Montpellier, France
- CIRAD, RP-PCP, UMR ASTRE, Harare, Zimbabwe
- Faculty of Veterinary Medicine, Kasetsart University, Bangkok, Thailand
| | - Chris Foggin
- Victoria Falls Wildlife Trust, P O Box 159, Victoria Falls, Zimbabwe
| | | | - Alexandre Caron
- ASTRE, CIRAD, INRA, Université de Montpellier, Montpellier, France
- CIRAD, RP-PCP, UMR ASTRE, Harare, Zimbabwe
- Faculdade de Veterinaria, Universidade Eduardo Mondlane, Maputo, Mozambique
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16
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Gormley E, Corner LAL. Wild Animal Tuberculosis: Stakeholder Value Systems and Management of Disease. Front Vet Sci 2018; 5:327. [PMID: 30622951 PMCID: PMC6308382 DOI: 10.3389/fvets.2018.00327] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/03/2018] [Accepted: 12/10/2018] [Indexed: 11/13/2022] Open
Abstract
When human health is put at risk from the transmission of animal diseases, the options for intervention often require input from stakeholders whose differing values systems contribute to decisions on disease management. Animal tuberculosis (TB), caused principally by Mycobacterium bovis is an archetypical zoonotic pathogen in that it can be transmitted from animals to humans and vice versa. Although elimination of zoonotic transmission of TB to humans is frequently promoted as the raison d'être for TB management in livestock, in many countries the control strategies are more likely based on minimizing the impact of sustained infection on the agricultural industry. Where wild animals are implicated in the epidemiology of the disease, the options for control and eradication can require involvement of additional stakeholder groups. Conflict can arise when different monetary and/or societal values are assigned to the affected animals. This may impose practical and ethical dilemmas for decision makers where one or more species of wild animal is seen by some stakeholders to have a greater value than the affected livestock. Here we assess the role of stakeholder values in influencing TB eradication strategies in a number of countries including Ireland, the UK, the USA, Spain, France, Australia, New Zealand and South Africa. What it reveals is that the level of stakeholder involvement increases with the complexity of the epidemiology, and that similar groups of stakeholders may agree to a set of control and eradication measures in one region only to disagree with applying the same measures in another. The level of consensus depends on the considerations of the reservoir status of the infected host, the societal values assigned to each species, the type of interventions proposed, ethical issues raised by culling of sentient wild animals, and the economic cost benefit effectiveness of dealing with the problem in one or more species over a long time frame. While there is a societal benefit from controlling TB, the means to achieve this requires identification and long-term engagement with all key stakeholders in order to reach agreement on ethical frameworks that prioritize and justify control options, particularly where culling of wild animals is concerned.
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Affiliation(s)
- Eamonn Gormley
- School of Veterinary Medicine, University College Dublin, Dublin, Ireland
| | - Leigh A L Corner
- School of Veterinary Medicine, University College Dublin, Dublin, Ireland
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17
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Tavalire HF, Beechler BR, Buss PE, Gorsich EE, Hoal EG, le Roex N, Spaan JM, Spaan RS, van Helden PD, Ezenwa VO, Jolles AE. Context-dependent costs and benefits of tuberculosis resistance traits in a wild mammalian host. Ecol Evol 2018; 8:12712-12726. [PMID: 30619576 PMCID: PMC6308860 DOI: 10.1002/ece3.4699] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/29/2018] [Revised: 10/02/2018] [Accepted: 10/12/2018] [Indexed: 12/24/2022] Open
Abstract
Disease acts as a powerful driver of evolution in natural host populations, yet individuals in a population often vary in their susceptibility to infection. Energetic trade-offs between immune and reproductive investment lead to the evolution of distinct life history strategies, driven by the relative fitness costs and benefits of resisting infection. However, examples quantifying the cost of resistance outside of the laboratory are rare. Here, we observe two distinct forms of resistance to bovine tuberculosis (bTB), an important zoonotic pathogen, in a free-ranging African buffalo (Syncerus caffer) population. We characterize these phenotypes as "infection resistance," in which hosts delay or prevent infection, and "proliferation resistance," in which the host limits the spread of lesions caused by the pathogen after infection has occurred. We found weak evidence that infection resistance to bTB may be heritable in this buffalo population (h 2 = 0.10) and comes at the cost of reduced body condition and marginally reduced survival once infected, but also associates with an overall higher reproductive rate. Infection-resistant animals thus appear to follow a "fast" pace-of-life syndrome, in that they reproduce more quickly but die upon infection. In contrast, proliferation resistance had no apparent costs and was associated with measures of positive host health-such as having a higher body condition and reproductive rate. This study quantifies striking phenotypic variation in pathogen resistance and provides evidence for a link between life history variation and a disease resistance trait in a wild mammalian host population.
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Affiliation(s)
- Hannah F. Tavalire
- Department of Integrative BiologyOregon State UniversityCorvallisOregon
- The Institute of Ecology and EvolutionUniversity of OregonEugeneOregon
- Present address:
Prevention Science InstituteUniversity of OregonEugeneOregon
- Present address:
Institute of Ecology and EvolutionUniversity of OregonEugeneOregon
| | | | | | - Erin E. Gorsich
- College of Veterinary MedicineOregon State UniversityCorvallisOregon
- Present address:
Erin E. Gorsich, Zeeman Institute: Systems Biology and Infectious Disease Epidemiology Research (SBIDER)University of WarwickCoventryUK
- Present address:
School of Life SciencesUniversity of WarwickCoventryUK
| | - Eileen G. Hoal
- South African Medical Research Council, DST/NRF Centre of Excellence for Biomedical TB Research, Division of Molecular Biology and Human Genetics, Faculty of Health SciencesStellenbosch UniversityTygerbergSouth Africa
| | - Nikki le Roex
- South African Medical Research Council, DST/NRF Centre of Excellence for Biomedical TB Research, Division of Molecular Biology and Human Genetics, Faculty of Health SciencesStellenbosch UniversityTygerbergSouth Africa
| | - Johannie M. Spaan
- Department of Integrative BiologyOregon State UniversityCorvallisOregon
| | - Robert S. Spaan
- Department of Fisheries and WildlifeOregon State UniversityCorvallisOregon
| | - Paul D. van Helden
- South African Medical Research Council, DST/NRF Centre of Excellence for Biomedical TB Research, Division of Molecular Biology and Human Genetics, Faculty of Health SciencesStellenbosch UniversityTygerbergSouth Africa
| | - Vanessa O. Ezenwa
- Odum School of Ecology and Department of Infectious Diseases, College of Veterinary MedicineUniversity of GeorgiaAthensGeorgia
| | - Anna E. Jolles
- Department of Integrative BiologyOregon State UniversityCorvallisOregon
- College of Veterinary MedicineOregon State UniversityCorvallisOregon
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18
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Valls-Fox H, Chamaillé-Jammes S, de Garine-Wichatitsky M, Perrotton A, Courbin N, Miguel E, Guerbois C, Caron A, Loveridge A, Stapelkamp B, Muzamba M, Fritz H. Water and cattle shape habitat selection by wild herbivores at the edge of a protected area. Anim Conserv 2018. [DOI: 10.1111/acv.12403] [Citation(s) in RCA: 23] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- H. Valls-Fox
- LTSER France; Zone Atelier “Hwange”; Hwange National Park; CNRS HERD (Hwange Environmental Research Development) program; Dete Zimbabwe
- Centre d'Ecologie Fonctionnelle et Evolutive UMR 5175; CNRS; Université de Montpellier; Université Paul Valéry Montpellier; EPHE; Montpellier Cedex 5 France
- CIRAD; RP-PCP; University of Zimbabwe; Harare Zimbabwe
- CIRAD; UMR SELMET; Montpellier France
| | - S. Chamaillé-Jammes
- LTSER France; Zone Atelier “Hwange”; Hwange National Park; CNRS HERD (Hwange Environmental Research Development) program; Dete Zimbabwe
- Centre d'Ecologie Fonctionnelle et Evolutive UMR 5175; CNRS; Université de Montpellier; Université Paul Valéry Montpellier; EPHE; Montpellier Cedex 5 France
| | - M. de Garine-Wichatitsky
- LTSER France; Zone Atelier “Hwange”; Hwange National Park; CNRS HERD (Hwange Environmental Research Development) program; Dete Zimbabwe
- CIRAD; RP-PCP; University of Zimbabwe; Harare Zimbabwe
- CIRAD; UMR ASTRE; Montpellier France
- ASTRE; Université de Montpellier; CIRAD; INRA; Montpellier France
| | - A. Perrotton
- LTSER France; Zone Atelier “Hwange”; Hwange National Park; CNRS HERD (Hwange Environmental Research Development) program; Dete Zimbabwe
- CIRAD; RP-PCP; University of Zimbabwe; Harare Zimbabwe
- CIRAD; UMR ASTRE; Montpellier France
- ASTRE; Université de Montpellier; CIRAD; INRA; Montpellier France
| | - N. Courbin
- Centre d'Ecologie Fonctionnelle et Evolutive UMR 5175; CNRS; Université de Montpellier; Université Paul Valéry Montpellier; EPHE; Montpellier Cedex 5 France
| | - E. Miguel
- LTSER France; Zone Atelier “Hwange”; Hwange National Park; CNRS HERD (Hwange Environmental Research Development) program; Dete Zimbabwe
- CIRAD; RP-PCP; University of Zimbabwe; Harare Zimbabwe
- MIVEGEC; IRD; CNRS; Univ. Montpellier; Montpellier France
| | - C. Guerbois
- LTSER France; Zone Atelier “Hwange”; Hwange National Park; CNRS HERD (Hwange Environmental Research Development) program; Dete Zimbabwe
- CIRAD; RP-PCP; University of Zimbabwe; Harare Zimbabwe
- Sustainability Research Unit; Nelson Mandela University; George South Africa
| | - A. Caron
- LTSER France; Zone Atelier “Hwange”; Hwange National Park; CNRS HERD (Hwange Environmental Research Development) program; Dete Zimbabwe
- CIRAD; RP-PCP; University of Zimbabwe; Harare Zimbabwe
- CIRAD; UMR ASTRE; Montpellier France
- ASTRE; Université de Montpellier; CIRAD; INRA; Montpellier France
| | - A. Loveridge
- Department of Zoology; University of Oxford; Wild CRU; Recanati-Kaplan centre; Abingdon UK
| | - B. Stapelkamp
- LTSER France; Zone Atelier “Hwange”; Hwange National Park; CNRS HERD (Hwange Environmental Research Development) program; Dete Zimbabwe
- Department of Zoology; University of Oxford; Wild CRU; Recanati-Kaplan centre; Abingdon UK
- The Soft Foot Alliance trust; Dete Zimbabwe
| | - M. Muzamba
- LTSER France; Zone Atelier “Hwange”; Hwange National Park; CNRS HERD (Hwange Environmental Research Development) program; Dete Zimbabwe
- CIRAD; RP-PCP; University of Zimbabwe; Harare Zimbabwe
| | - H. Fritz
- LTSER France; Zone Atelier “Hwange”; Hwange National Park; CNRS HERD (Hwange Environmental Research Development) program; Dete Zimbabwe
- CIRAD; RP-PCP; University of Zimbabwe; Harare Zimbabwe
- LBBE; CNRS; Université de Lyon 1; Villeurbanne France
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19
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Dougherty ER, Seidel DP, Carlson CJ, Spiegel O, Getz WM. Going through the motions: incorporating movement analyses into disease research. Ecol Lett 2018; 21:588-604. [PMID: 29446237 DOI: 10.1111/ele.12917] [Citation(s) in RCA: 72] [Impact Index Per Article: 12.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/21/2017] [Revised: 09/22/2017] [Accepted: 01/01/2018] [Indexed: 01/28/2023]
Abstract
Though epidemiology dates back to the 1700s, most mathematical representations of epidemics still use transmission rates averaged at the population scale, especially for wildlife diseases. In simplifying the contact process, we ignore the heterogeneities in host movements that complicate the real world, and overlook their impact on spatiotemporal patterns of disease burden. Movement ecology offers a set of tools that help unpack the transmission process, letting researchers more accurately model how animals within a population interact and spread pathogens. Analytical techniques from this growing field can also help expose the reverse process: how infection impacts movement behaviours, and therefore other ecological processes like feeding, reproduction, and dispersal. Here, we synthesise the contributions of movement ecology in disease research, with a particular focus on studies that have successfully used movement-based methods to quantify individual heterogeneity in exposure and transmission risk. Throughout, we highlight the rapid growth of both disease and movement ecology and comment on promising but unexplored avenues for research at their overlap. Ultimately, we suggest, including movement empowers ecologists to pose new questions, expanding our understanding of host-pathogen dynamics and improving our predictive capacity for wildlife and even human diseases.
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Affiliation(s)
- Eric R Dougherty
- Department of Environmental Science Policy and Management, University of California, Berkeley, CA, USA
| | - Dana P Seidel
- Department of Environmental Science Policy and Management, University of California, Berkeley, CA, USA
| | - Colin J Carlson
- Department of Environmental Science Policy and Management, University of California, Berkeley, CA, USA
| | - Orr Spiegel
- Mitrani Department of Desert Ecology, Jacob Blaustein Institutes for Desert Research, Ben-Gurion University of the Negev, Beersheba, Israel
| | - Wayne M Getz
- Department of Environmental Science Policy and Management, University of California, Berkeley, CA, USA.,Schools of Mathematical Sciences, University of KwaZulu-Natal, Durban, South Africa
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20
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Moiane B, Mapaco L, Thompson P, Berg M, Albihn A, Fafetine J. High seroprevalence of Rift Valley fever phlebovirus in domestic ruminants and African Buffaloes in Mozambique shows need for intensified surveillance. Infect Ecol Epidemiol 2017; 7:1416248. [PMID: 29321827 PMCID: PMC5757227 DOI: 10.1080/20008686.2017.1416248] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/28/2017] [Accepted: 12/08/2017] [Indexed: 12/31/2022] Open
Abstract
Introduction: Rift Valley fever (RVF) is an arthropod-borne disease that affects both animals and humans. RVF phlebovirus (RVFPV) is widespread in Africa and Arabian Peninsula. In Mozambique, outbreaks were reported in South; seroprevalence studies performed in livestock and water buffaloes were limited to central and south regions. We evaluated the seroprevalence of RVFPV among domestic ruminants and African buffaloes from 7 of 10 provinces of Mozambique, to understand the distribution of RVFPV and provide data for further RVF control programs. Materials and methods: A total of 1581 blood samples were collected in cattle, 1117 in goats, 85 in sheep and 69 in African buffaloes, between 2013 and 2014, and the obtained sera were analyzed by ELISA. Results and discussion: The overall seroprevalence of RVFPV domestic ruminants and African buffaloes was 25.6%. The highest was observed in cattle (37.3%) and African buffaloes (30.4%), which were higher than in previous studies within Mozambique. In south and central regions, the overall seroprevalences were higher (14.9%–62.4%) than in the north. Conclusion: This study showed the presence of anti-RVFPV antibodies in animals from all sampled provinces, suggesting that RVFPV is actively circulating among domestic ruminants and African buffaloes in Mozambique, therefore surveillance should be intensified.
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Affiliation(s)
- Belisário Moiane
- Department of Para-clinical, Veterinary Faculty, Eduardo Mondlane University, Maputo, Mozambique.,Department of Biomedical Sciences and Veterinary Public Health, Swedish University of Agricultural Sciences, Uppsala, Sweden
| | - Lourenço Mapaco
- Directorate of Animal Sciences, Institute of Agrarian Research, Maputo, Mozambique
| | - Peter Thompson
- Department of Production Animal Studies, Faculty of Veterinary Science, University of Pretoria, Pretoria, Republic of South Africa
| | - Mikael Berg
- Department of Biomedical Sciences and Veterinary Public Health, Swedish University of Agricultural Sciences, Uppsala, Sweden
| | - Ann Albihn
- Department of Biomedical Sciences and Veterinary Public Health, Swedish University of Agricultural Sciences, Uppsala, Sweden.,Section for Environment and Biosecurity, National Veterinary Institute, Uppsala, Sweden
| | - José Fafetine
- Department of Para-clinical, Veterinary Faculty, Eduardo Mondlane University, Maputo, Mozambique
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21
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Rosen LE, Hanyire TG, Dawson J, Foggin CM, Michel AL, Huyvaert KP, Miller MA, Olea-Popelka FJ. Tuberculosis serosurveillance and management practices of captive African elephants (Loxodonta africana) in the Kavango-Zambezi Transfrontier Conservation Area. Transbound Emerg Dis 2017; 65:e344-e354. [PMID: 29143466 DOI: 10.1111/tbed.12764] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/03/2017] [Indexed: 11/29/2022]
Abstract
Transfrontier conservation areas represent an international effort to encourage conservation and sustainable development. Their success faces a number of challenges, including disease management in wildlife, livestock and humans. Tuberculosis (TB) affects humans and a multitude of non-human animal species and is of particular concern in sub-Saharan Africa. The Kavango-Zambezi Transfrontier Conservation Area encompasses five countries, including Zimbabwe, and is home to the largest contiguous population of free-ranging elephants in Africa. Elephants are known to be susceptible to TB; thus, understanding TB status, exposure and transmission risks to and from elephants in this area is of interest for both conservation and human health. To assess risk factors for TB seroprevalence, a questionnaire was used to collect data regarding elephant management at four ecotourism facilities offering elephant-back tourist rides in the Victoria Falls area of Zimbabwe. Thirty-five working African elephants were screened for Mycobacterium tuberculosis complex antibodies using the ElephantTB Stat-Pak and the DPP VetTB Assay for elephants. Six of 35 elephants (17.1%) were seropositive. The risk factor most important for seropositive status was time in captivity. This is the first study to assess TB seroprevalence and risk factors in working African elephants in their home range. Our findings will provide a foundation to develop guidelines to protect the health of captive and free-ranging elephants in the southern African context, as well as elephant handlers through simple interventions. Minimizing exposure through shared feed with other wildlife, routine TB testing of elephant handlers and regular serological screening of elephants are recommended as preventive measures.
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Affiliation(s)
- L E Rosen
- Department of Clinical Sciences, Colorado State University, Fort Collins, CO, USA.,Graduate Degree Program in Ecology, Colorado State University, Fort Collins, CO, USA
| | - T G Hanyire
- Wildlife Veterinary Unit, Department of Livestock and Veterinary Services, Ministry of Agriculture, Mechanisation and Irrigation, Harare, Zimbabwe.,Department of Veterinary Tropical Diseases, Faculty of Veterinary Science, University of Pretoria, Onderstepoort, Pretoria, South Africa
| | - J Dawson
- Victoria Falls Wildlife Trust, Victoria Falls, Zimbabwe
| | - C M Foggin
- Victoria Falls Wildlife Trust, Victoria Falls, Zimbabwe
| | - A L Michel
- Department of Veterinary Tropical Diseases, Faculty of Veterinary Science, University of Pretoria, Onderstepoort, Pretoria, South Africa
| | - K P Huyvaert
- Department of Fish, Wildlife, and Conservation Biology, Colorado State University, Fort Collins, CO, USA
| | - M A Miller
- DST/NRF Centre of Excellence for Biomedical Tuberculosis Research, Department of Biomedical Sciences, Faculty of Medicine and Health Sciences, Stellenbosch University, Cape Town, South Africa
| | - F J Olea-Popelka
- Department of Clinical Sciences, Colorado State University, Fort Collins, CO, USA.,Applied Veterinary Epidemiology Research Group, College of Veterinary Medicine and Biomedical Sciences, Colorado State University, Fort Collins, CO, USA
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22
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Miguel E, Grosbois V, Fritz H, Caron A, de Garine‐Wichatitsky M, Nicod F, Loveridge AJ, Stapelkamp B, Macdonald DW, Valeix M. Drivers of foot-and-mouth disease in cattle at wild/domestic interface: Insights from farmers, buffalo and lions. DIVERS DISTRIB 2017; 23:1018-1030. [PMID: 32313434 PMCID: PMC7163638 DOI: 10.1111/ddi.12585] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/19/2016] [Revised: 02/21/2017] [Accepted: 02/21/2017] [Indexed: 01/03/2023] Open
Abstract
Humans live increasingly in the proximity of natural areas, leading to increased interactions between people, their livestock and wildlife. AIM We explored the role of these interactions in the risk of disease transmission (foot-and-mouth disease [FMD]) between cattle and the African buffalo (the maintenance host) and how a top predator, the lion, may modulate these interactions. LOCATION The interface of Hwange National Park (HNP) and surrounding communal lands, Zimbabwe. METHOD We combined a longitudinal serological cattle survey for FMD, GPS-collar data and cattle owners' interviews during four seasons in 2010-2011. RESULTS Overall FMD incidence in cattle was low, but showed a peak during the rainy season. The incidence dynamic was significantly explained by cattle incursion into the protected area (i.e., buffer zone of 3 km inside HNP) and not by contacts with buffalo or contacts among cattle. These results suggest that FMD virus either survives in the environment or is transmitted by other ungulate groups or species. The analysis of incursion frequency in the buffer suggests that (1) buffalo and cattle are avoiding each other up to 2 months after one species track and that (2) lions make frequent incursions in the buffer few days to few weeks after buffalo had used it, whereas buffalo did not use areas occupied by lions. Lions could thus reduce the spatio-temporal overlap between cattle and buffalo in the interface, which could contribute to the low level of FMD incidence. MAIN CONCLUSIONS During the rainy season, traditional herding practices push cattle away from growing crops near villages into the HNP but not during the dry season, suggesting that cattle owners may decide to rely on lower quality resources in the communal land in the dry season to avoid the risks of infection and/or predation in the HNP.This study highlights the complex dynamics that operates at human/livestock/wildlife interfaces.
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Affiliation(s)
- Eve Miguel
- AGIRs Animal and Integrated Management UR22CiradMontpellierFrance
- RP‐PCP (Cirad, Cnrs, Nust, UZ)University of ZimbabweHarareZimbabwe
| | | | - Hervé Fritz
- RP‐PCP (Cirad, Cnrs, Nust, UZ)University of ZimbabweHarareZimbabwe
- Laboratoire de Biométrie et Biologie ÉvolutiveCNRS UMR 5558Université Claude BernardLyon 1VilleurbanneFrance
| | - Alexandre Caron
- AGIRs Animal and Integrated Management UR22CiradMontpellierFrance
- RP‐PCP (Cirad, Cnrs, Nust, UZ)University of ZimbabweHarareZimbabwe
- Department of Zoology and EntomologyMammal Research InstituteUniversity of PretoriaPretoriaSouth Africa
| | - Michel de Garine‐Wichatitsky
- AGIRs Animal and Integrated Management UR22CiradMontpellierFrance
- RP‐PCP (Cirad, Cnrs, Nust, UZ)University of ZimbabweHarareZimbabwe
| | - Florian Nicod
- AGIRs Animal and Integrated Management UR22CiradMontpellierFrance
| | - Andrew J Loveridge
- Wildlife Conservation Research UnitRecanati‐Kaplan CentreDepartment of ZoologyOxford UniversityAbingdonUK
| | - Brent Stapelkamp
- Wildlife Conservation Research UnitRecanati‐Kaplan CentreDepartment of ZoologyOxford UniversityAbingdonUK
| | - David W. Macdonald
- Wildlife Conservation Research UnitRecanati‐Kaplan CentreDepartment of ZoologyOxford UniversityAbingdonUK
| | - Marion Valeix
- Laboratoire de Biométrie et Biologie ÉvolutiveCNRS UMR 5558Université Claude BernardLyon 1VilleurbanneFrance
- Wildlife Conservation Research UnitRecanati‐Kaplan CentreDepartment of ZoologyOxford UniversityAbingdonUK
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23
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Ndengu M, Matope G, de Garine-Wichatitsky M, Tivapasi M, Scacchia M, Bonfini B, Pfukenyi DM. Seroprevalence of brucellosis in cattle and selected wildlife species at selected livestock/wildlife interface areas of the Gonarezhou National Park, Zimbabwe. Prev Vet Med 2017; 146:158-165. [PMID: 28992921 DOI: 10.1016/j.prevetmed.2017.08.004] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/02/2017] [Revised: 07/12/2017] [Accepted: 08/04/2017] [Indexed: 01/01/2023]
Abstract
A study was conducted to investigate seroprevalence and risk factors for Brucella species infection in cattle and some wildlife species in communities living at the periphery of the Great Limpopo Transfrontier Conservation Area in south eastern Zimbabwe. Three study sites were selected based on the type of livestock-wildlife interface: porous livestock-wildlife interface (unrestricted); non-porous livestock-wildlife interface (restricted by fencing); and livestock-wildlife non-interface (totally absent or control). Sera were collected from cattle aged≥2years representing both female and intact male animals. Sera were also collected from selected wild ungulates from Mabalauta (porous interface) and Chipinda (non-interface) areas of the Gonarezhou National Park. Samples were screened for Brucellaantibodies using the Rose Bengal plate test and confirmed by the complement fixation test. Data were analysed by descriptive statistics and multivariate logistic regression modelling. In cattle, brucellosis seroprevalence from all areas was 16.7% (169/1011; 95% CI: 14.5-19.2%). The porous interface recorded a significantly (p=0.03) higher seroprevalence (19.5%; 95% CI: 16.1-23.4%) compared to the non-interface area (13.0%; 95% CI: 9.2-19.9%).The odds of Brucellaseropositivity increased progressively with parity of animals and were also three times higher (OR=3.0, 2.0<OR<4.6, p<0.0001) in cows with history of abortion compared to those without.Brucella antibodies were detected in buffaloes; 20.7% (95% CI: 13.9-29.7%) form both study sites, but no antibodies were detected from impalas and kudus. These results highlight the importance of porous interface in the interspecies transmission of Brucella species and that independent infections may be maintained in buffalo populations. Thus, brucellosis control aimed at limiting animal inter-species mixing may help reduce the risk of human brucellosis in interface areas. Further studies should aim at establishing subspecies identity and direction of possible transmission of brucellosis between wildlife and livestock.
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Affiliation(s)
- Masimba Ndengu
- Department of Clinical Veterinary Studies, Faculty of Veterinary Science, University of Zimbabwe, P.O. BoxMP 167, Mount Pleasant, Harare, Zimbabwe; Research Platform Production and Conservation in Partnership, P.O. Box 1378, Harare, Zimbabwe.
| | - Gift Matope
- Research Platform Production and Conservation in Partnership, P.O. Box 1378, Harare, Zimbabwe; Department of Paraclinical Veterinary Studies, Faculty of Veterinary Science, University of Zimbabwe, P.O. Box MP 167, Mount Pleasant, Harare, Zimbabwe
| | - Michel de Garine-Wichatitsky
- Research Platform Production and Conservation in Partnership, P.O. Box 1378, Harare, Zimbabwe; UR AGIRs, Cirad, Campus International de Baillarguet, 34398 Montpellier, France
| | - Musavengana Tivapasi
- Department of Clinical Veterinary Studies, Faculty of Veterinary Science, University of Zimbabwe, P.O. BoxMP 167, Mount Pleasant, Harare, Zimbabwe; Research Platform Production and Conservation in Partnership, P.O. Box 1378, Harare, Zimbabwe
| | - Massimo Scacchia
- IstitutoZooprofilatticoSperimentaledell'Abruzzo e del Molise "G.Caporale", Via Campo Boario, 64100 Teramo, Italy
| | - Barbara Bonfini
- IstitutoZooprofilatticoSperimentaledell'Abruzzo e del Molise "G.Caporale", Via Campo Boario, 64100 Teramo, Italy
| | - Davis Mubika Pfukenyi
- Department of Clinical Veterinary Studies, Faculty of Veterinary Science, University of Zimbabwe, P.O. BoxMP 167, Mount Pleasant, Harare, Zimbabwe; Research Platform Production and Conservation in Partnership, P.O. Box 1378, Harare, Zimbabwe
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24
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Gomo C, Kanonhuwa K, Godobo F, Tada O, Makuza SM. Temporal and spatial distribution of lumpy skin disease (LSD) outbreaks in Mashonaland West Province of Zimbabwe from 2000 to 2013. Trop Anim Health Prod 2017; 49:509-514. [DOI: 10.1007/s11250-017-1222-y] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/17/2016] [Accepted: 01/15/2017] [Indexed: 11/30/2022]
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25
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Meunier NV, Sebulime P, White RG, Kock R. Wildlife-livestock interactions and risk areas for cross-species spread of bovine tuberculosis. Onderstepoort J Vet Res 2017; 84:e1-e10. [PMID: 28155286 PMCID: PMC6238759 DOI: 10.4102/ojvr.v84i1.1221] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/14/2016] [Revised: 06/12/2016] [Accepted: 07/21/2016] [Indexed: 11/01/2022] Open
Abstract
The transmission of diseases between livestock and wildlife can be a hindrance to effective disease control. Maintenance hosts and contact rates should be explored to further understand the transmission dynamics at the wildlife-livestock interface. Bovine tuberculosis (BTB) has been shown to have wildlife maintenance hosts and has been confirmed as present in the African buffalo (Syncerus caffer) in the Queen Elizabeth National Park (QENP) in Uganda since the 1960s. The first aim of this study was to explore the spatio-temporal spread of cattle illegally grazing within the QENP recorded by the Uganda Wildlife Authority (UWA) rangers in a wildlife crime database. Secondly, we aimed to quantify wildlife-livestock interactions and cattle movements, on the border of QENP, using a longitudinal questionnaire completed by 30 livestock owners. From this database, 426 cattle sightings were recorded within QENP in 8 years. Thirteen (3.1%) of these came within a 300 m-4 week space-time window of a buffalo herd, using the recorded GPS data. Livestock owners reported an average of 1.04 (95% CI 0.97-1.11) sightings of Uganda kob, waterbuck, buffalo or warthog per day over a 3-month period, with a rate of 0.22 (95% CI 0.20-0.25) sightings of buffalo per farmer per day. Reports placed 85.3% of the ungulate sightings and 88.0% of the buffalo sightings as further than 50 m away. Ungulate sightings were more likely to be closer to cattle at the homestead (OR 2.0, 95% CI 1.1-3.6) compared with the grazing area. Each cattle herd mixed with an average of five other cattle herds at both the communal grazing and watering points on a daily basis. Although wildlife and cattle regularly shared grazing and watering areas, they seldom came into contact close enough for aerosol transmission. Between species infection transmission is therefore likely to be by indirect or non-respiratory routes, which is suspected to be an infrequent mechanism of transmission of BTB. Occasional cross-species spillover of infection is possible, and the interaction of multiple wildlife species needs further investigation. Controlling the interface between wildlife and cattle in a situation where eradication is not being considered may have little impact on BTB disease control in cattle.
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Affiliation(s)
- Natascha V Meunier
- Department of Pathology and Pathogen Biology, Royal Veterinary College; Faculty of Epidemiology and Population Health, London School of Hygiene and Tropical Medicine.
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