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Atero N, Córdova-Bührle F, Salgado-Caxito M, Benavides JA, Fernández M, Diethelm-Varela B, Ramos R, Sapiente Aguirre C, Trujillo F, Dürr S, Mardones FO. An assessment of the owned canine and feline demographics in Chile: registration, sterilization, and unsupervised roaming indicators. Prev Vet Med 2024; 226:106185. [PMID: 38507889 DOI: 10.1016/j.prevetmed.2024.106185] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/12/2023] [Revised: 03/06/2024] [Accepted: 03/08/2024] [Indexed: 03/22/2024]
Abstract
The global rise in companion animal populations, particularly dogs and cats, is driven by emotional and social benefits for owners, and their population management is becoming critically important to avoid a plethora of adverse effects on themselves, humans, and wildlife. We estimated the size and density of the owned canine and feline population in Chile and evaluated the status of microchipping, registration, sterilization rates, and the proportion of owned animals that roam unsupervised. A cross-sectional household survey in 36 districts was conducted and standard inferential statistics was employed to analyze differences between cats and dogs, sexes within each species, and between rural and urban areas. Additionally, two negative binomial models with mixed effects were developed to predict the number of dogs and cats per households. Two methods were used to compare population size estimates at the country level, multiplying: (1) the estimated mean number of companion animals per household by the estimated number of households at the country level, and (2) the estimated human:dog and human:cat ratios by the total human population. The study involved 6333 respondents, of which 76% (74% urban; 83% rural) owned companion animals (dogs and/or cats). Individuals in rural multi-person households increase the probability of owning dogs and/or cats. Additionally, women exhibit a greater inclination towards cat and dog ownership compared to men, while those over 30 years old demonstrate lower rates of companion animal ownership in contrast to the 18-30 age group for both species. The overall human:dog and human:cat ratios estimated were 2.7:1, and 6.2:1, respectively. The estimated total number of owned dogs and cats in Chile ranged from 9.6 to 10.7 million, depending on the methodological approach, while national median density of companion animals was 12 dogs per km2 (ranging from 0.02 to 7232) and 5 cats per km2 (ranging from 0.01 to 3242). This nationwide study showed one of the highest percentages of households with companion animals in Latin America and relatively low registration and sterilization rates, highlighting the need to strength long-term public policies to control populations of companion animals and promote responsibility in pet ownership.
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Affiliation(s)
- Nicolhole Atero
- Escuela de Medicina Veterinaria, Facultad de Agronomía e Ingeniería Forestal, Facultad de Ciencias Biológicas y Facultad de Medicina, Pontificia Universidad Católica de Chile, Santiago, Chile
| | - Francisca Córdova-Bührle
- Escuela de Medicina Veterinaria, Facultad de Agronomía e Ingeniería Forestal, Facultad de Ciencias Biológicas y Facultad de Medicina, Pontificia Universidad Católica de Chile, Santiago, Chile; Dirección de Transferencia y Desarrollo, Vicerrectoría de Investigación, Pontificia Universidad Católica de Chile, Santiago, Chile
| | | | - Julio A Benavides
- UMR MIVEGEC, IRD, CNRS, Université Montpellier, Montpellier, France; Centro de Investigación para la Sustentabilidad y Doctorado en Medicina de la Conservación, Facultad Ciencias de la Vida, Universidad Andrés Bello, Santiago, Chile
| | - Miriam Fernández
- Estación Costera de Investigaciones Marinas (ECIM), Las Cruces, Facultad de Ciencias Biológicas y Núcleo Milenio para la Ecología y la Conservación de los Ecosistemas de Arrecifes Mesofóticos Templados (NUTME), Pontificia Universidad Católica de Chile, Av. Bernardo O'Higgins 340, Santiago, Chile
| | - Benjamín Diethelm-Varela
- Escuela de Medicina Veterinaria, Facultad de Agronomía e Ingeniería Forestal, Facultad de Ciencias Biológicas y Facultad de Medicina, Pontificia Universidad Católica de Chile, Santiago, Chile; Departamento de Genética Molecular y Microbiología, Facultad de Ciencias Biológicas, Pontificia Universidad Católica de Chile, Santiago 7820244, Chile
| | - Romina Ramos
- Escuela de Medicina Veterinaria, Facultad de Agronomía e Ingeniería Forestal, Facultad de Ciencias Biológicas y Facultad de Medicina, Pontificia Universidad Católica de Chile, Santiago, Chile
| | - Claudia Sapiente Aguirre
- Programa Nacional de Tenencia Responsable de Animales de Compañía (PTRAC), Subsecretaría de Desarrollo Regional y Administrativo (SUBDERE), Ministerio del Interior y Seguridad Pública de Chile; Departamento de Planificación y Gestión, de la División de Administración y Finanzas, Subsecretaría de Desarrollo Regional y Administrativo (SUBDERE), Ministerio del Interior y Seguridad Pública de Chile, Chile
| | - Florencia Trujillo
- Programa Nacional de Tenencia Responsable de Animales de Compañía (PTRAC), Subsecretaría de Desarrollo Regional y Administrativo (SUBDERE), Ministerio del Interior y Seguridad Pública de Chile
| | - Salome Dürr
- Veterinary Public Health Institute, Vetsuisse Faculty, University of Bern, Bern, Switzerland
| | - Fernando O Mardones
- Escuela de Medicina Veterinaria, Facultad de Agronomía e Ingeniería Forestal, Facultad de Ciencias Biológicas y Facultad de Medicina, Pontificia Universidad Católica de Chile, Santiago, Chile; Departamento de Enfermedades Infecciosas e Inmunología Pediátrica, Escuela de Medicina, Pontificia Universidad Católica de Chile, Santiago 7820244, Chile.
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Doras C, Özcelik R, Abakar MF, Issa R, Kimala P, Youssouf S, Bolon I, Dürr S. Community-based symptom reporting among agro-pastoralists and their livestock in Chad in a One Health approach. Acta Trop 2024; 253:107167. [PMID: 38458407 DOI: 10.1016/j.actatropica.2024.107167] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/02/2023] [Revised: 02/02/2024] [Accepted: 02/28/2024] [Indexed: 03/10/2024]
Abstract
One Health Syndromic Surveillance has a high potential for detecting early epidemiological events in remote and hard-to-reach populations. Chadian pastoralists living close to their animals and being socio-economically unprivileged have an increased risk for zoonosis exposure. Engaging communities in disease surveillance could also strengthen preparedness capacities for outbreaks in rural Chad. This study describes a retrospective cross-sectional survey that collected data on clinical symptoms reported in people and livestock in Chadian agro-pastoral communities. In January-February 2018, interviews were conducted in rural households living in nomadic camps or settled villages in the Yao and Danamadji health districts. The questionnaire covered demographic data and symptoms reported in humans and animals for the hot, wet, and cold seasons over the last 12 months. Incidence rates of human and animal symptoms were comparatively analyzed at the household level. Ninety-two households with a homogeneous socio-demographic distribution were included. We observed cough and diarrhea as the most frequent symptoms reported simultaneously in humans and animals. In all species, the incidence rate of cough was significantly higher during the cold season, and diarrhea tended to occur more frequently during the wet season. However, the incidence rate of cough and diarrhea in animals did not predict the incidence rate of these symptoms in humans. Overall, the variations in reported symptoms were consistent with known seasonal, regional, and sociological influences on endemic diseases. Our retrospective study demonstrated the feasibility of collecting relevant health data in humans and animals in remote regions with low access to health services by actively involving community members. This encourages establishing real-time community-based syndromic surveillance in areas such as rural Chad.
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Affiliation(s)
- Camille Doras
- Institute of Global Health, Faculty of Medicine, University of Geneva, Geneva, Switzerland; Veterinary Public Health Institute, Vetsuisse Faculty Bern, University of Bern, Bern, Switzerland
| | - Ranya Özcelik
- Veterinary Public Health Institute, Vetsuisse Faculty Bern, University of Bern, Bern, Switzerland
| | | | - Ramadan Issa
- Institut de Recherche en Elevage pour le Développement (IRED), N'Djamena, Chad
| | - Pidou Kimala
- Institut de Recherche en Elevage pour le Développement (IRED), N'Djamena, Chad
| | - Soumaya Youssouf
- Institut de Recherche en Elevage pour le Développement (IRED), N'Djamena, Chad
| | - Isabelle Bolon
- Institute of Global Health, Faculty of Medicine, University of Geneva, Geneva, Switzerland
| | - Salome Dürr
- Veterinary Public Health Institute, Vetsuisse Faculty Bern, University of Bern, Bern, Switzerland.
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Alinaitwe L, Aturinda CJ, Lubega A, Kivali V, Bugeza J, Wainaina M, Richter MH, Hoona JJ, Roesel K, Mayer-Scholl A, Cook EAJ, Kankya C, Dürr S. Cross-sectional serosurvey of Leptospira species among slaughter pigs, goats, and sheep in Uganda. PLoS Negl Trop Dis 2024; 18:e0012055. [PMID: 38489377 PMCID: PMC10971767 DOI: 10.1371/journal.pntd.0012055] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/14/2023] [Revised: 03/27/2024] [Accepted: 03/07/2024] [Indexed: 03/17/2024] Open
Abstract
INTRODUCTION Leptospira are a group of bacteria, including pathogenic types that cause leptospirosis. In Uganda, Leptospira exposure has been reported in humans, with domesticated animals being speculated as the source. However, comparable evidence of Leptospira prevalence and circulating serovars/serogroups in animals is only documented for cattle, and dogs. Our study determined Leptospira seroprevalence, associated risk factors and serogroups circulating among slaughtered pigs, goats, and sheep in Uganda. METHODS During an 11-month cross-sectional survey in selected slaughter facilities in three regions of Uganda, we collected blood from 926 pigs, 347 goats, and 116 sheep. The age, sex, breed, and origin of each sampled animal were noted. The samples were tested for anti-Leptospira antibodies using the microscopic agglutination test, based on a panel of 12 serovars belonging to 12 serogroups. RESULTS Leptospira seroprevalence was 26.67% (247/926, 95%CI 23.92-29.61) among pigs, and 21.81% (101/463, 95%CI 18.29-25.80) in goats and sheep (small ruminants). L. interrogans Australis and L. kirschneri Grippotyphosa were the commonest serovars among pigs, as was L. borgpetersenii Tarassovi in small ruminants. Pigs sourced from the Eastern (Odds Ratio [OR] = 2.82, 95%CI 1.84-4.30) and Northern (OR = 3.56, 95%CI 2.52-5.02) regions were more likely to be seropositive, compared to those from the Central region. For small ruminants, being female (OR 2.74, 95% CI 1.69-4.57) and adult (OR 4.47, 95% CI 1.57-18.80) was significantly more associated with Leptospira seropositivity. Conclusion/significance: Detection of a moderate seroprevalence, and several Leptospira serogroups among pigs, sheep, and goats from all regions of Uganda, supports existing reports in cattle and dogs, and implies widespread Leptospira exposure in domestic animals in Uganda. These findings may inform future programs for the control of leptospirosis in livestock in Uganda.
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Affiliation(s)
- Lordrick Alinaitwe
- Human and Animal Health Program, International Livestock Research Institute, Nairobi, Kenya
- Veterinary Public Health Institute, University of Bern, Bern, Switzerland
- Graduate School for Cellular and Biomedical Sciences, University of Bern, Bern, Switzerland
- College of Veterinary Medicine, Animal Resources and Biosecurity (COVAB), Makerere University, Kampala, Uganda
| | - Christopher Joshua Aturinda
- College of Veterinary Medicine, Animal Resources and Biosecurity (COVAB), Makerere University, Kampala, Uganda
| | - Ashiraf Lubega
- College of Veterinary Medicine, Animal Resources and Biosecurity (COVAB), Makerere University, Kampala, Uganda
| | - Velma Kivali
- Human and Animal Health Program, International Livestock Research Institute, Nairobi, Kenya
| | - James Bugeza
- Human and Animal Health Program, International Livestock Research Institute, Nairobi, Kenya
- Vaccinology Research Program, National Livestock Resources Research Institute, Kampala, Uganda
| | - Martin Wainaina
- Department of Biological Safety, Federal Institute for Risk Assessment, Berlin, Germany
| | - Martin H. Richter
- Department of Biological Safety, Federal Institute for Risk Assessment, Berlin, Germany
| | - Jolly Justine Hoona
- Department of Animal Production, Ministry of Agriculture, Animal Industry and Fisheries (MAAIF), Entebbe, Uganda
| | - Kristina Roesel
- Human and Animal Health Program, International Livestock Research Institute, Nairobi, Kenya
| | - Anne Mayer-Scholl
- Department of Biological Safety, Federal Institute for Risk Assessment, Berlin, Germany
| | | | - Clovice Kankya
- College of Veterinary Medicine, Animal Resources and Biosecurity (COVAB), Makerere University, Kampala, Uganda
| | - Salome Dürr
- Veterinary Public Health Institute, University of Bern, Bern, Switzerland
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Sousa FM, Warembourg C, Abakar MF, Alvarez D, Berger-Gonzalez M, Odoch T, Wera E, Chitnis N, Silva LC, Alobo G, Sikko MM, Roquel P, Hernández ALL, Dürr S. Investigation of optimized observation periods for estimating a representative home range of free-roaming domestic dogs. Sci Rep 2023; 13:22750. [PMID: 38123585 PMCID: PMC10733426 DOI: 10.1038/s41598-023-49851-2] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/06/2023] [Accepted: 12/12/2023] [Indexed: 12/23/2023] Open
Abstract
Free-roaming domestic dogs (FRDD), as vectors of zoonotic diseases, are of high relevance for public health. Understanding roaming patterns of dogs can help to design disease control programs and disease transmission simulation models. Studies on GPS tracking of dogs report stark differences in recording periods. So far, there is no accepted number of days required to capture a representative home range (HR) of FRDD. The objective of this study was to evaluate changes in HR size and shape over time of FRDD living in Chad, Guatemala, Indonesia and Uganda and identify the period required to capture stable HR values. Dogs were collared with GPS units, leading to a total of 46 datasets with, at least, 19 recorded days. For each animal and recorded day, HR sizes were estimated using the Biased Random Bridge method and percentages of daily change in size and shape calculated and taken as metrics. The analysis revealed that the required number of days differed substantially between individuals, isopleths, and countries, with the extended HR (95% isopleth value) requiring a longer recording period. To reach a stable HR size and shape values for 75% of the dogs, 26 and 21 days, respectively, were sufficient. However, certain dogs required more extended observational periods.
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Affiliation(s)
- Filipe Maximiano Sousa
- Veterinary Public Health Institute, Vetsuisse Faculty, University of Bern, Bern, Switzerland.
- Graduate School for Cellular and Biomedical Sciences, University of Bern, Bern, Switzerland.
| | - Charlotte Warembourg
- Veterinary Public Health Institute, Vetsuisse Faculty, University of Bern, Bern, Switzerland
| | | | - Danilo Alvarez
- Universidad del Valle de Guatemala, Guatemala City, Guatemala
| | - Monica Berger-Gonzalez
- Universidad del Valle de Guatemala, Guatemala City, Guatemala
- Swiss Tropical and Public Health Institute, Allschwil, Switzerland
| | - Terence Odoch
- College of Veterinary Medicine, Animal Resources and Biosecurity, Makerere University, Kampala, Uganda
| | - Ewaldus Wera
- Kupang State Agricultural Polytechnic (Politeknik Pertanian Negeri Kupang), West Timor, Indonesia
| | - Nakul Chitnis
- Swiss Tropical and Public Health Institute, Allschwil, Switzerland
- University of Basel, Basel, Switzerland
| | - Laura Cunha Silva
- Veterinary Public Health Institute, Vetsuisse Faculty, University of Bern, Bern, Switzerland
| | - Grace Alobo
- College of Veterinary Medicine, Animal Resources and Biosecurity, Makerere University, Kampala, Uganda
| | - Maria M Sikko
- Animal Health Division, Agricultural Department of Sikka Regency, Flores, Indonesia
| | - Pablo Roquel
- Universidad del Valle de Guatemala, Guatemala City, Guatemala
| | | | - Salome Dürr
- Veterinary Public Health Institute, Vetsuisse Faculty, University of Bern, Bern, Switzerland
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Clavadetscher G, Biner B, Schaub M, Studer E, Dürr S, Blatter S, Schmelz P, Steinborn R, Brandt S, Seuberlich T, Steiner A, Alsaaod M. [Risk factors for chronic perforating skin lesions in the area of the digits in cattle on Swiss alpine pastures]. SCHWEIZ ARCH TIERH 2023; 165:771-782. [PMID: 38014543 DOI: doi.org/10.17236/sat00412] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2023]
Abstract
INTRODUCTION Diseases of the digits often occur in cattle on larger cattle mountain pastures. In the late spring 2020, at the time of the ascent of 1554 cattle to 11 high altitude alpine pastures in the Lower Engadine region, lesions in the area of the digits were clinically assessed and documented. 254 cattle were of non-cantonal and 1300 of local origin (Lower Engadine; postal code CH-75XX). Skin lesions in the area of the digits, identified as digital dermatitis (DD; Mortellaro's disease), were further classified according to the DD scoring system. Nonspecific skin lesions with clinical evidence of granulation tissue formation were termed chronic penetrating skin lesions (CPSL). At the end of the alpine pasturing season, in the early fall (descent of cattle from the alpine pastures), the procedure was repeated, and biopsies were taken from randomly selected cattle with CPSL. Digital dermatitis lesions were found in 34 of 1551 cattle at ascent, but no case of CPSL was found at that time. At descent, 19 of 1529 cattle had DD lesions and 88 cattle had CPSL. The clinical appearance of the CPSL was consistent with chronic skin lesions caused by penetrating skin lacerations. Histologically, the majority of the CPSL were classified as chronic hyperplastic dermatitis with granulation tissue formation. In all CPSL biopsies examined by PCR, Fusobacterium necrophorum and Porphyromonas levii, but neither Dichelobacter nodosus nor the tested Treponema species were detected. Fluorescence in situ hybridization revealed a negative result for Treponema species in all biopsies. In the regression analysis, cattle in the age group of 365 to 730 days had an increased risk for the presence of CPSL compared to the age group of 160 to 365 days (odds ratio (OR) = 4,95; confidence interval (CI) = 1,97-12,43). Holstein cattle had an increased risk of developing CPSL compared to Brown cattle (OR = 2,92; CI = 1,46-5,86) and cattle of non-cantonal origin showed a massively higher risk compared to local cattle (OR = 10,59; CI = 5,79 - 19,37). The statistically significant associations found in the present study can be taken into account in the selection of animals for summer pasturing on high altitudes in the future in order to reduce the prevalence of CPSL and consequently reduce the antimicrobial use. Spread of DD during the alpine pasturing season within the cattle groups examined was not found.
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Affiliation(s)
- G Clavadetscher
- Wiederkäuerklinik, Vetsuisse-Fakultät, Universität Bern
- Clinica Alpina SA, Tiermedizinisches Zentrum, Scuol, Switzerland
| | - B Biner
- Clinica Alpina SA, Tiermedizinisches Zentrum, Scuol, Switzerland
| | - M Schaub
- Wiederkäuerklinik, Vetsuisse-Fakultät, Universität Bern
| | - E Studer
- Wiederkäuerklinik, Vetsuisse-Fakultät, Universität Bern
| | - S Dürr
- Veterinary Public Health Institut (VPHI), Vetsuisse-Fakultät, Universität Bern
| | - S Blatter
- Institut für Tierpathologie, Vetsuisse-Fakultät, Universität Bern
| | - P Schmelz
- AG Genomik, VetCore, Veterinärmedizinische Universität Wien
| | - R Steinborn
- AG Genomik, VetCore, Veterinärmedizinische Universität Wien
| | - S Brandt
- Universitätsklinik für Pferde, Veterinärmedizinische Universität Wien
| | - T Seuberlich
- Abteilung Neurologische Wissenschaften, Vetsuisse-Fakultät, Universität Bern
| | - A Steiner
- Wiederkäuerklinik, Vetsuisse-Fakultät, Universität Bern
| | - M Alsaaod
- Wiederkäuerklinik, Vetsuisse-Fakultät, Universität Bern
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Alban L, Brookes VJ, Dórea F, Sauter-Louis C, Dürr S. Editorial: Bridging science and policy for animal health surveillance: ICAHS4 2022. Front Vet Sci 2023; 10:1285992. [PMID: 37822953 PMCID: PMC10562719 DOI: 10.3389/fvets.2023.1285992] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/30/2023] [Accepted: 09/14/2023] [Indexed: 10/13/2023] Open
Affiliation(s)
- Lis Alban
- Department for Food Safety, Veterinary Issues and Risk Analysis, Danish Agriculture & Food Council, Aarhus, Denmark
- Department of Veterinary and Animal Sciences, University of Copenhagen, Frederiksberg, Denmark
| | - Victoria J. Brookes
- Sydney School of Veterinary Science, University of Sydney, Camperdown, NSW, Australia
| | - Fernanda Dórea
- Department of Disease Control and Epidemiology, National Veterinary Institute, Uppsala, Sweden
| | | | - Salome Dürr
- Veterinary Public Health Institute, Vetsuisse Faculty, University of Bern, Bern, Switzerland
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Tesfaye AB, Assefa GA, Shishaye LB, Abera BM, Gebreanenya NT, Gebregiorgis GL, Dürr S. Outbreak investigation of foot-and-mouth disease in cattle in Tigray region, Northern Ethiopia. Front Vet Sci 2023; 10:1157395. [PMID: 37645676 PMCID: PMC10462391 DOI: 10.3389/fvets.2023.1157395] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/02/2023] [Accepted: 07/18/2023] [Indexed: 08/31/2023] Open
Abstract
An investigation of a foot-and-mouth disease (FMD) outbreak was conducted between late October and mid-December 2019 in Tigray region. The outbreak investigation team collected epidemiological data from the six villages of Kafta Humera and Seharti Samre districts, including morbidity proportions, mortality proportions, and clinical signs, and cattle management and vaccination history were collected via participatory methods, including interviews and group discussions with local experts and farmers in Kafta Humera and reports from the district veterinarians in Seharti Samre. Twenty-two tissue samples were collected for laboratory confirmation. Overall, 4,299/9,811 (43.8%) and 13,654/16,921 (80.6%) cattle showed clinical signs for FMD in Kafta Humera and Seharti Samre, respectively. In Kafta Humera, the highest morbidity proportion was found in adult cows and heifers (48.1%), followed by 27.8% in oxen and 15.9% in calves. In Seharti Samre, the morbidity proportion was similar in all age groups at ~81%. No death of FMD-suspected cattle was reported throughout the outbreak. The serotype of foot-and-mouth disease virus (FMDV) identified by laboratory analysis differed between the two districts (serotype O in Kafta Humera and serotype A in Seharti Samre). We, therefore, suggest that the outbreaks in the two districts occurred independently from each other. Experts and farmers were interviewed and believed that the outbreak in Kafta Humera was most likely caused by interaction between cattle and wildlife from the surrounding Kafta Sheraro National Park, which share common grazing land. This outbreak investigation showed that FMD can cause devastating cattle morbidity. A regular vaccination program against the identified circulating FMDV serotypes with sufficient coverage is required to avoid future outbreaks.
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Affiliation(s)
- Adehanom Baraki Tesfaye
- Mekelle Agricultural Research Center, Tigray Agricultural Research Institute, Mekelle, Ethiopia
| | - Guash Abay Assefa
- Abergelle Agricultural Research Center, Tigray Agricultural Research Institute, Abi Adi, Ethiopia
| | - Leul Berhe Shishaye
- Humera Begait Research Center, Tigray Agricultural Research Institute, Humera, Ethiopia
| | - Bisrat Mesfin Abera
- Tigray Bureau of Agriculture and Rural Development, Animal Health Core-process, Mekelle, Ethiopia
| | | | | | - Salome Dürr
- Veterinary Public Health Institute, University of Bern, Bern, Switzerland
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Fahrion AS, Freuling CM, Léchenne M, Müller T, Recuenco S, Vigilato MAN, Busch F, Heitz-Tokpa K, Mauti S, Muturi M, Dürr S. Editorial: Rabies, a long-standing One Health example - progress, challenges, lessons and visions on the way to 0 by 30. Front Vet Sci 2023; 10:1220327. [PMID: 37533452 PMCID: PMC10392924 DOI: 10.3389/fvets.2023.1220327] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/10/2023] [Accepted: 07/07/2023] [Indexed: 08/04/2023] Open
Affiliation(s)
- Anna S. Fahrion
- Institute for International Animal Health/One Health, Friedrich-Loeffler-Institute, Federal Research Institute for Animal Health, Riems, Germany
| | - Conrad M. Freuling
- Institute for Molecular Virology and Cell Biology, Friedrich-Loeffler-Institute, Federal Research Institute for Animal Health, Riems, Germany
| | - Monique Léchenne
- Department of Epidemiology and Public Health, Swiss Tropical and Public Health Institute, Allschwil, Switzerland
- Department of Public Health, Medical Faculty, University of Basel, Basel, Switzerland
| | - Thomas Müller
- Institute for Molecular Virology and Cell Biology, Friedrich-Loeffler-Institute, Federal Research Institute for Animal Health, Riems, Germany
| | - Sergio Recuenco
- Department of Preventive Medicine and Public Health, Faculty of Medicine, Universidad Nacional Mayor de San Marcos, Lima, Peru
| | - Marco A. N. Vigilato
- Pan American Foot and Mouth Disease and Veterinary Public Health Center, Pan American Health Organization, Rio de Janeiro, Brazil
| | - Frank Busch
- Institute for International Animal Health/One Health, Friedrich-Loeffler-Institute, Federal Research Institute for Animal Health, Riems, Germany
| | - Kathrin Heitz-Tokpa
- Centre Suisse de Recherches Scientifiques en Côte d'Ivoire, Abidjan, Côte d'Ivoire
| | - Stephanie Mauti
- Department of Epidemiology and Public Health, Swiss Tropical and Public Health Institute, Allschwil, Switzerland
- Department of Public Health, Medical Faculty, University of Basel, Basel, Switzerland
| | - Mathew Muturi
- Zoonotic Disease Unit, State Directorate of Veterinary Services, Nairobi, Kenya
- Department of Veterinary Medicine, Dahlem Research School of Biomedical Sciences (DRS), Freie Universität Berlin, Berlin, Germany
| | - Salome Dürr
- Veterinary Public Health Institute, Vetsuisse Faculty, University of Bern, Bern, Switzerland
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Özcelik R, Abakar MF, Counotte MJ, Abdelrazak Zakaria F, Kimala P, Issa R, Dürr S. Seroprevalence and associated risk factors of brucellosis, Rift Valley fever and Q fever among settled and mobile agro-pastoralist communities and their livestock in Chad. PLoS Negl Trop Dis 2023; 17:e0011395. [PMID: 37352362 DOI: 10.1371/journal.pntd.0011395] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/17/2022] [Accepted: 05/22/2023] [Indexed: 06/25/2023] Open
Abstract
Brucellosis, Rift Valley fever (RVF) and Q fever are zoonoses prevalent in many developing countries, causing a high burden on human and animal health. Only a few studies are available on these among agro-pastoralist communities and their livestock in Chad. The objective of our study was to estimate brucellosis, RVF and Q fever seroprevalence among Chadian agro-pastoralist communities and their livestock, and to investigate risk factors for seropositivity. We conducted a multi-stage cross-sectional serological survey in two rural health districts, Yao and Danamadji (966 human and 1041 livestock (cattle, sheep, goat and equine) samples)). The true seroprevalence were calculated applying a Bayesian framework to adjust for imperfect diagnostic test characteristics and accounting for clustering in the study design. Risk factors for each of the zoonotic diseases were estimated using mixed effects logistic regression models. The overall prevalence for brucellosis, Q fever and RVF combined for both regions was estimated at 0.2% [95% credibility Interval: 0-1.1], 49.1% [%CI: 38.9-58.8] and 28.1% [%CI: 23.4-33.3] in humans, and 0.3% [%CI: 0-1.5], 12.8% [%CI: 9.7-16.4] and 10.2% [%CI: 7.6-13.4] in animals. Risk factors correlating significantly with the respective disease seropositivity were sex for human brucellosis, sex and Q fever co-infection for animal brucellosis, age for human Q fever, species and brucellosis co-infection for animal Q fever, age and herd-level animal RVF seroprevalence within the same cluster for human RVF, and cluster-level human RVF seroprevalence within the same cluster for animal RVF. In Danamadji and Yao, Q fever and RVF are notably seroprevalent among agro-pastoralist human and animal communities, while brucellosis appears to have a low prevalence. Correlation between the seroprevalence between humans and animals living in the same communities was detected for RVF, highlighting the interlinkage of human and animal transmissible diseases and of their health, highlighting the importance of a One Health approach.
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Affiliation(s)
- Ranya Özcelik
- Veterinary Public Health Institute, Vetsuisse Faculty, University of Bern, Bern, Switzerland
| | | | | | | | - Pidou Kimala
- Institut de Recherche en Elevage pour le Développement, N'Djamena, Chad
| | - Ramadane Issa
- Institut de Recherche en Elevage pour le Développement, N'Djamena, Chad
| | - Salome Dürr
- Veterinary Public Health Institute, Vetsuisse Faculty, University of Bern, Bern, Switzerland
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10
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Kirkeby C, Brookes VJ, Ward MP, Dürr S, Halasa T. Corrigendum: A practical introduction to mechanistic modeling of disease transmission in veterinary science. Front Vet Sci 2023; 10:1129870. [PMID: 36756311 PMCID: PMC9900625 DOI: 10.3389/fvets.2023.1129870] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/22/2022] [Accepted: 01/09/2023] [Indexed: 01/25/2023] Open
Abstract
[This corrects the article DOI: 10.3389/fvets.2020.546651.].
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Affiliation(s)
- Carsten Kirkeby
- Department of Veterinary and Animal Sciences, Faculty of Health and Medical Sciences, University of Copenhagen, Frederiksberg, Denmark,*Correspondence: Carsten Kirkeby ✉
| | - Victoria J. Brookes
- School of Animal and Veterinary Sciences, Faculty of Science, Charles Sturt University, Wagga, NSW, Australia,Graham Centre for Agricultural Innovation (Charles Sturt University and NSW Department of Primary Industries), Wagga, NSW, Australia
| | - Michael P. Ward
- Faculty of Veterinary Science, Sydney School of Veterinary Science, University of Sydney, Sydney, NSW, Australia
| | - Salome Dürr
- Department of Clinical Research and Public Health, Veterinary Public Health Institute, University of Bern, Bern, Switzerland
| | - Tariq Halasa
- Department of Veterinary and Animal Sciences, Faculty of Health and Medical Sciences, University of Copenhagen, Frederiksberg, Denmark
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11
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Cunha Silva L, Friker B, Warembourg C, Kanankege K, Wera E, Berger-González M, Alvarez D, Dürr S. Habitat selection by free-roaming domestic dogs in rabies endemic countries in rural and urban settings. Sci Rep 2022; 12:20928. [PMID: 36463285 PMCID: PMC9719531 DOI: 10.1038/s41598-022-25038-z] [Citation(s) in RCA: 4] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/02/2022] [Accepted: 11/23/2022] [Indexed: 12/07/2022] Open
Abstract
Domestic dogs can affect human health through bites and pathogen transmission, particularly in resource-poor countries where dogs, including owned ones, predominantly roam freely. Habitat and resource selection analysis methods are commonplace in wildlife studies but have not been used to investigate the environmental resource use of free-roaming domestic dogs (FRDD). The present study implements GPS devices to investigate habitat selection by FRDD from an urban site and a rural site in Indonesia, and one urban and two rural sites in Guatemala (N = 321 dogs). Spatial mixed effects logistic regression models, accounting for heterogeneous distribution of the resources, showed that patterns of habitat selection by FRDD were similar across study sites. The most preferred resources were anthropogenic, being buildings and roads, which implies selection for human proximity. Vegetation and open fields were less preferred and steep terrain was avoided, indicating that FRDD were synanthropic and that their space patterns likely optimised energy use. Results presented here provide novel data on FRDD habitat selection patterns, while improving our understanding of dog roaming behaviour. These findings provide insights into possible high-risk locations for pathogen transmission for diseases such as rabies, and can assist management authorities in the planning and deployment of efficient disease control campaigns, including oral vaccination.
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Affiliation(s)
- Laura Cunha Silva
- grid.5734.50000 0001 0726 5157Veterinary Public Health Institute, Vetsuisse Faculty, University of Bern, Bern, Switzerland ,grid.5734.50000 0001 0726 5157Graduate School for Cellular and Biomedical Sciences, University of Bern, Bern, Switzerland
| | - Brian Friker
- grid.5734.50000 0001 0726 5157Veterinary Public Health Institute, Vetsuisse Faculty, University of Bern, Bern, Switzerland
| | - Charlotte Warembourg
- grid.5734.50000 0001 0726 5157Veterinary Public Health Institute, Vetsuisse Faculty, University of Bern, Bern, Switzerland
| | - Kaushi Kanankege
- grid.17635.360000000419368657College of Veterinary Medicine, University of Minnesota, St Paul, MN USA
| | - Ewaldus Wera
- Kupang State Agricultural Polytechnic (Politeknik Pertanian Negeri Kupang), West Timor, Indonesia
| | - Monica Berger-González
- grid.8269.50000 0000 8529 4976Universidad del Valle de Guatemala, Guatemala City, Guatemala ,grid.416786.a0000 0004 0587 0574Swiss Tropical and Public Health Institute, Basel, Switzerland
| | - Danilo Alvarez
- grid.8269.50000 0000 8529 4976Universidad del Valle de Guatemala, Guatemala City, Guatemala
| | - Salome Dürr
- grid.5734.50000 0001 0726 5157Veterinary Public Health Institute, Vetsuisse Faculty, University of Bern, Bern, Switzerland
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12
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Galli F, Friker B, Bearth A, Dürr S. Direct and indirect pathways for the spread of African swine fever and other porcine infectious diseases: An application of the mental models approach. Transbound Emerg Dis 2022; 69:e2602-e2616. [PMID: 35665473 PMCID: PMC9796639 DOI: 10.1111/tbed.14605] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/14/2022] [Revised: 05/02/2022] [Accepted: 05/26/2022] [Indexed: 01/01/2023]
Abstract
In this study, we investigated the occurrence of direct and indirect infectious disease transmission pathways among pig farms in Switzerland, as well as their specific relevance for the spread of African swine fever, porcine reproductive and respiratory syndrome (PRRS), and enzootic pneumonia. Data were collected using an adapted mental models approach, involving initial interviews with experts in the field of pig health and logistics, semi-structured interviews with pig farmers, and a final expert workshop, during which all identified pathways were graded by their predicted frequency of occurrence, their likelihood of spread of the three diseases of interest, and their overall relevance considering both parameters. As many as 24 disease pathways were identified in four areas: pig trade, farmer encounters, external collaborators, and environmental or other pathways. Two thirds of the pathways were expected to occur with moderate-to-high frequency. While both direct and indirect pig trade transmission routes were highly relevant for the spread of the three pathogens, pathways from the remaining areas were especially important for PRRS due to higher spread potential via aerosols and fomites. In addition, we identified factors modifying the relevance of disease pathways, such as farm production type and affiliation with trader companies. During the interviews, we found varying levels of risk perception among farmers concerning some of the pathways, which affected adherence to biosecurity measures and were often linked to the degree of trust that farmers had towards their colleagues and external collaborators. Our findings highlight the importance of integrating indirect disease pathways into existing surveillance and control strategies and in disease modelling efforts. We also propose that biosecurity training aimed at professionals and risk communication campaigns targeting farmers should be considered to mitigate the risk of disease spread through the identified pathways.
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Affiliation(s)
- Francesco Galli
- Veterinary Public Health Institute (VPHI)Vetsuisse FacultyUniversity of BernBernSwitzerland
| | - Brian Friker
- Veterinary Public Health Institute (VPHI)Vetsuisse FacultyUniversity of BernBernSwitzerland
| | - Angela Bearth
- Consumer BehaviorInstitute for Environmental DecisionsSwiss Federal Institute of Technology Zurich (ETHZ)ZurichSwitzerland
| | - Salome Dürr
- Veterinary Public Health Institute (VPHI)Vetsuisse FacultyUniversity of BernBernSwitzerland
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13
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Wera E, Warembourg C, Bulu PM, Siko MM, Dürr S. Immune Response After Rabies Vaccination in Owned Free-Roaming Domestic Dogs in Flores Island, Indonesia. Front Vet Sci 2022; 9:868380. [PMID: 35754536 PMCID: PMC9218352 DOI: 10.3389/fvets.2022.868380] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/02/2022] [Accepted: 05/02/2022] [Indexed: 11/17/2022] Open
Abstract
Vaccination is the main tool to prevent the circulation of rabies in dog populations. The development of an immune response after vaccination differs between individual dogs and depends on many factors such as dog characteristics, management, or genetics. Here, we first investigated the level of, and associated factors for, the presence of binding antibodies in 130 healthy dogs from Flores Island, Indonesia. Secondly, we identified factors associated with the development of binding antibodies within 30 days after vaccination among a subsample of dogs that had a binding antibody titre <0.5 EU/ml at the day of vaccination (D0, N = 91). Blood samples were collected from the individual dogs immediately before vaccination at D0 and 30 days after vaccination (D30). The rabies antibody titres were determined using ELISAs. Information on potential risk factors such as the dog's age and sex, history of vaccination, type and frequency of feeding, and BCS (body condition score) were gathered during interviews at D0. Regression analyses were performed to identify the risk factors associated with the presence of binding antibody titre ≥0.5 EU/ml at D0 for the 130 dogs and the development of binding antibody titre ≥0.5EU/ml at D30 for the 91 dogs. The results showed that the proportion of dogs with antibody titre ≥0.5 EU/ml was 30% (39/130) at D0. The only factors found to be significantly influencing the presence of binding antibodies titres ≥0.5 EU/ml was previous vaccination within 1 year before D0 [46.8 vs. 14.7%, Odds ratio (OR) = 3.6, 95%CI 1.5–9.3; p-value = 0.006], although the same trend was found for dogs of higher age and better BCS. Eighty-six percent (79/91) of dogs whose rabies binding antibody level was <0.5 EU/ml at D0 had developed an adequate immune response (≥0.5 EU/ml) at D30. Almost a significantly higher proportion developed an adequate immune response in dogs of good BCS compared to those of poor BCS (95.3% vs. 79.2%, OR = 4.7, 95%CI 1.1–32.5; p-value = 0.057. Twelve (13.2%) dogs retain binding antibody level <0.5 EU/ml at D30, indicating poor immune response after vaccination. A majority of them did not receive vaccine before D0 according to the owner and had poor BCS (83.3%; 10/12). Our findings show the high effectiveness of rabies vaccine in under field conditions to develop measurable immunity and the importance of a good BCS, often achievable by good dog keeping conditions, for developing efficient immunity after parenteral vaccination in dogs.
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Affiliation(s)
- Ewaldus Wera
- Animal Health Study Program, Kupang State Agricultural Polytechnic (Politeknik Pertanian Negeri Kupang), Kupang, Indonesia
| | - Charlotte Warembourg
- Vetsuisse Faculty, Veterinary Public Health Institute, University of Bern, Bern, Switzerland
| | - Petrus M Bulu
- Animal Health Study Program, Kupang State Agricultural Polytechnic (Politeknik Pertanian Negeri Kupang), Kupang, Indonesia
| | - Maria M Siko
- Animal Health Division, Agricultural Department of Sikka Regency, Maumere, Indonesia
| | - Salome Dürr
- Vetsuisse Faculty, Veterinary Public Health Institute, University of Bern, Bern, Switzerland
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14
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Kankya C, Dürr S, Hartnack S, Warembourg C, Okello J, Muleme J, Okello W, Methodius T, Alobo G, Odoch T. Awareness, Knowledge, and Perceptions Regarding Rabies Prevention Among Rural Communities in Masaka District, Central Uganda: A Qualitative Study. Front Vet Sci 2022; 9:863526. [PMID: 35769323 PMCID: PMC9236570 DOI: 10.3389/fvets.2022.863526] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/27/2022] [Accepted: 04/12/2022] [Indexed: 11/13/2022] Open
Abstract
Rabies is a zoonotic disease that is mainly transmitted to humans through dog bites. It remains a major public health threat in many Asian and African countries, including Uganda. The main objective of this study was to investigate awareness, knowledge, and perceptions of communities toward human and dog health related to rabies prevention, as well as dog management practices within Masaka district, central Uganda. Data collection involved nine key informant interviews (KIIs) and six focus group discussions (FGDs). Methods used during focus group discussions included qualitative interviews (using open-ended questions), simple ranking, and proportional piling. Data from KIIs and FGDs were analyzed using content analysis in NVivo (version 12.0). This study reveals that community members in the rural settings uses herbal concoctions in replacement or as an alternative to dog vaccination. Furthermore, the study reveals that dogs play the vital roles in the households like as they offer protection to people and household properties, despite being ranked second least among the household animals. The commonest livelihood activity was a small-scale mixed farming. Most of the households kept dogs, but they are ranked at second lowest in terms of economic value among all domestic animals. Free roaming and tethering were the common dog-keeping systems, and home-based feed (food leftovers, bones) was provided mainly to the tethered dogs. Rabies, also locally known as “Eddalu Lyembwa” (that can be translated as “madness of the dogs”), was ranked as the disease of most important among dogs, besides other common diseases such as skin diseases, venereal diseases, worm infestations, and tick infestations. Inadequate vaccination services for both humans and dogs were reported, and dog bite victims traveled a long distance to seek for post-exposure prophylaxis after dog bites. It can be concluded that there is a clear request for periodic mass vaccination campaigns against rabies among dogs, and access to vaccines within reasonable distances by humans after a rabies exposure, but also pre-emptive vaccination for those at high risk, such as veterinarians, needs to be improved.
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Affiliation(s)
- Clovice Kankya
- Department of Biosecurity, Ecosystems and Veterinary Public Health, School of Biosecurity, Biotechnical and Laboratory Sciences, College of Veterinary Medicine, Animal Resources and Biosecurity, Makerere University, Kampala, Uganda
- *Correspondence: Clovice Kankya
| | - Salome Dürr
- Veterinary Public Health Institute, Vetsuisse Faculty, University of Bern, Bern, Switzerland
| | - Sonja Hartnack
- Section of Epidemiology, Vetsuisse Faculty, University of Zurich, Zurich, Switzerland
| | - Charlotte Warembourg
- Veterinary Public Health Institute, Vetsuisse Faculty, University of Bern, Bern, Switzerland
| | - Justine Okello
- Department of Biosecurity, Ecosystems and Veterinary Public Health, School of Biosecurity, Biotechnical and Laboratory Sciences, College of Veterinary Medicine, Animal Resources and Biosecurity, Makerere University, Kampala, Uganda
| | - James Muleme
- Department of Biosecurity, Ecosystems and Veterinary Public Health, School of Biosecurity, Biotechnical and Laboratory Sciences, College of Veterinary Medicine, Animal Resources and Biosecurity, Makerere University, Kampala, Uganda
- Department of Disease Control and Environmental Health, School of Public Health, College of Health Sciences, Makerere University, Kampala, Uganda
| | - Walter Okello
- Department of Biosecurity, Ecosystems and Veterinary Public Health, School of Biosecurity, Biotechnical and Laboratory Sciences, College of Veterinary Medicine, Animal Resources and Biosecurity, Makerere University, Kampala, Uganda
| | - Tubihemukama Methodius
- Department of Biosecurity, Ecosystems and Veterinary Public Health, School of Biosecurity, Biotechnical and Laboratory Sciences, College of Veterinary Medicine, Animal Resources and Biosecurity, Makerere University, Kampala, Uganda
| | - Grace Alobo
- Department of Biosecurity, Ecosystems and Veterinary Public Health, School of Biosecurity, Biotechnical and Laboratory Sciences, College of Veterinary Medicine, Animal Resources and Biosecurity, Makerere University, Kampala, Uganda
| | - Terence Odoch
- Department of Biosecurity, Ecosystems and Veterinary Public Health, School of Biosecurity, Biotechnical and Laboratory Sciences, College of Veterinary Medicine, Animal Resources and Biosecurity, Makerere University, Kampala, Uganda
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15
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Schmid RM, Steiner A, Becker J, Baumberger S, Dürr S, Alsaaod M. Field Validation of a Non-carcinogenic and Eco-Friendly Disinfectant in a Stand-In Footbath for Treatment of Footrot Associated With aprV2-Positive Strains of Dichelobacter nodosus in Swiss Sheep Flocks. Front Vet Sci 2022; 9:812638. [PMID: 35774977 PMCID: PMC9237958 DOI: 10.3389/fvets.2022.812638] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/10/2021] [Accepted: 03/30/2022] [Indexed: 11/13/2022] Open
Abstract
A national control program for virulent footrot is currently planned in Switzerland. Since commonly used disinfectants either contain heavy metals or are carcinogenic, the aim of this study was to verify the effectiveness of an eco-friendly and non-carcinogenic candidate disinfectant against aprV2-positive strains of Dichelobacter nodosus. Additionally, the effect of the selective use of long-acting oxytetracyclines was evaluated. A total of 18 farms with confirmed footrot infection, randomly allocated to two treatment groups: (1) with antibiotics (AB; n = 9) and, (2) no antibiotics (NAB; n = 9), were included. Claws were carefully trimmed and scored using a scale from 0 (clinically healthy) to 5 (complete loss of the horn capsule) and a prewash waterbath was implemented on 11 farms. Twice-weekly, repeated whole-flock stand-in footbaths with the candidate disinfectant (6%) were performed. Additionally, animals of group AB with a score ≥ 3 were administered oxytetracyclines by injection. On all farms, 10 days after last treatment, aprV2-positive strains could not be detected by risk-based sampling for real-time PCR analysis after 7–21 (median = 12) footbaths with a minimal culling rate of non-responders on nine farms. Farms without contact to other sheep remained without clinical signs of footrot for a minimum of 245 days (mean ± standard deviation: 293.6 ± 23.6). Antibiotic treatment did not reduce the number of footbaths needed. In contrast, a mean of 3.3 disinfecting footbaths could be saved by implementing a prewash waterbath. At animal level, individual and selective use of oxytetracyclines lead to a higher chance (odds ratio = 9.95; 95% CI: 3.54–27.95; p < 0.001) for a lesion score ≥ 3 to improve to a lesion score < 3 within 2 weeks compared to treatment without antibiotics. The test disinfectant is an effective and eco-friendly alternative for the planned Swiss footrot control program and selective use of oxytetracycline has a beneficial impact on the recovery of animals with lesion scores ≥ 3.
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Affiliation(s)
- Robin Michael Schmid
- Clinic for Ruminants, Department of Clinical Veterinary Science, Vetsuisse-Faculty, University of Bern, Bern, Switzerland
| | - Adrian Steiner
- Clinic for Ruminants, Department of Clinical Veterinary Science, Vetsuisse-Faculty, University of Bern, Bern, Switzerland
| | - Jens Becker
- Clinic for Ruminants, Department of Clinical Veterinary Science, Vetsuisse-Faculty, University of Bern, Bern, Switzerland
| | - Sandra Baumberger
- Clinic for Ruminants, Department of Clinical Veterinary Science, Vetsuisse-Faculty, University of Bern, Bern, Switzerland
| | - Salome Dürr
- Veterinary Public Health Institute, Department of Clinical Research and Veterinary Public Health, Vetsuisse-Faculty, University of Bern, Bern, Switzerland
| | - Maher Alsaaod
- Clinic for Ruminants, Department of Clinical Veterinary Science, Vetsuisse-Faculty, University of Bern, Bern, Switzerland
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16
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Alsaaod M, Dürr S, Iten D, Buescher W, Steiner A. Locomotion behavior of dairy cows on traditional summer mountain farms in comparison with modern cubicle housing without access to pasture. PLoS One 2022; 17:e0264320. [PMID: 35263371 PMCID: PMC8906619 DOI: 10.1371/journal.pone.0264320] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/25/2021] [Accepted: 02/08/2022] [Indexed: 11/19/2022] Open
Abstract
Pasture based systems enable cattle to express their natural behavior and are thus expected to provide better welfare than the majority of confinement systems. The aim of this study was to objectively measure locomotion activity of healthy dairy cattle kept on mountain pastures (n = 44) compared with cows kept in cubicle housing systems (n = 38). Selected cows were equipped with a validated 3D-accelerometer on one hind limb, and locomotion behavior was recorded for 48 hours. The 1-hour summaries of the variables lying time, walking time, standing bouts, walking bouts and number of strides were summed up to 24-hour summaries, and the means of the stride distance and stride duration were weighted by the variable number of strides. Mountain pasture cows had higher locomotor activity levels in comparison to cubicle cows. Mountain pasture cows spent less time lying down (528.1±109.5 min/day vs. 693.3±73.8 min/day; P<0.0001) and more time walking (75.6±25.9 min/day vs. 38.8±15.8 min/day; P <0.0001) than cubicle cows. Lying bout duration was longer in cubicle than in mountain pasture cows (90.9± 15.2 min/bout vs. 74.2 ± 21.1 min/bout; P = 0.0001), whilst the number of walking bouts was higher in mountain pasture cows than cubicle cows (199.1 ± 49.1 vs. 123.8 ± 43.8 bouts per day; P < 0.001). Likewise, the number of strides was higher in mountain pasture cows than cubicle cows (2040.5 ± 825.3 vs. 916.7 ± 408.6; P < 0.001). Mountain pasture cows had shorter stride duration (P < 0.0001) and shorter strides (P = 0.0002) than cubicle cows (1.8 ± 0.1 s/stride vs 2 ± 0.2 s/stride and 126.3 ± 18.1 vs 142.1 ± 17.8 m/stride, respectively). In summary, cows kept on mountain pasture were more active and spent longer than 12 hours / day standing. Lying markedly less than 12 hours per day seems to represent the normal behavior of pastured cows searching for fresh grass. This does not cause any obvious damage to the locomotor system as claws of cattle are well adapted to long periods of movement on mountain pastures.
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Affiliation(s)
- Maher Alsaaod
- Clinic for Ruminants, Vetsuisse-Faculty, University of Bern, Bern, Switzerland
- * E-mail:
| | - Salome Dürr
- Veterinary Public Health Institute, Vetsuisse-Faculty, University of Bern, Bern, Switzerland
| | - Damian Iten
- Clinic for Ruminants, Vetsuisse-Faculty, University of Bern, Bern, Switzerland
| | - Wolfgang Buescher
- Livestock Technology Section, Institute for Agricultural Engineering, University of Bonn, Bonn, Germany
| | - Adrian Steiner
- Clinic for Ruminants, Vetsuisse-Faculty, University of Bern, Bern, Switzerland
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17
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De la Puente‐Arévalo M, Motta P, Dürr S, Warembourg C, Nikola C, Burdon‐Bailey J, Mayer D, Lohr F, Gibson AD, Chikungwa P, Chulu J, Gamble L, Anderson NE, Bronsvoort BMD, Mellanby RJ, Mazeri S. Ranging patterns and factors associated with movement in free-roaming domestic dogs in urban Malawi. Ecol Evol 2022; 12:e8498. [PMID: 35127025 PMCID: PMC8794712 DOI: 10.1002/ece3.8498] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/16/2021] [Revised: 12/03/2021] [Accepted: 12/10/2021] [Indexed: 11/16/2022] Open
Abstract
Rabies is a neglected zoonotic disease that causes around 59,000 deaths per year globally. In Africa, rabies virus is mostly maintained in populations of free-roaming domestic dogs (FRDD) that are predominantly owned. Characterizing the roaming behavior of FRDD can provide relevant information to understand disease spread and inform prevention and control interventions. To estimate the home range (HR) of FRDD and identify predictors of HR size, we studied 168 dogs in seven different areas of Blantyre city, Malawi, tracking them with GPS collars for 1-4 days. The median core HR (HR50) of FRDD in Blantyre city was 0.2 ha (range: 0.08-3.95), while the median extended HR (HR95) was 2.14 ha (range: 0.52-23.19). Multivariable linear regression models were built to identify predictors of HR size. Males presented larger HR95 than females. Dogs living in houses with a higher number of adults had smaller HR95, while those living in houses with higher number of children had larger HR95. Animals that received products of animal origin in their diets had larger HR95, and only in the case of females, animals living in low-income areas had larger HR50 and HR95. In contrast, whether male dogs were castrated or not was not found to be associated with HR size. The results of this study may help inform rabies control and prevention interventions in Blantyre city, such as designing risk-based surveillance activities or rabies vaccination campaigns targeting certain FRDD subpopulations. Our findings can also be used in rabies awareness campaigns, particularly to illustrate the close relationship between children and their dogs.
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Affiliation(s)
| | - Paolo Motta
- European Commission for the Control of Foot‐and‐Mouth DiseaseFAORomeItaly
| | - Salome Dürr
- Veterinary Public Health Institute, Vetsuisse FacultyUniversity of BernBernSwitzerland
| | - Charlotte Warembourg
- Veterinary Public Health Institute, Vetsuisse FacultyUniversity of BernBernSwitzerland
| | | | | | | | | | | | | | - Julius Chulu
- Department of Animal Health and Livestock DevelopmentLilongweMalawi
| | | | - Neil E. Anderson
- The Roslin Institute and The Royal (Dick) School of Veterinary Studies, Easter Bush Veterinary CentreUniversity of EdinburghMidlothianUK
| | - Barend M deC. Bronsvoort
- The Epidemiology, Economics and Risk Assessment Group, The Roslin Institute and The Royal (Dick) School of Veterinary Studies, Easter Bush Veterinary CentreThe University of EdinburghMidlothianUK
| | - Richard J. Mellanby
- Division of Veterinary Clinical Studies, Hospital for Small Animals, The Roslin Institute and The Royal (Dick) School of Veterinary Studies, Easter Bush Veterinary CentreThe University of EdinburghMidlothianUK
| | - Stella Mazeri
- Mission RabiesCranborneUK
- The Epidemiology, Economics and Risk Assessment Group, The Roslin Institute and The Royal (Dick) School of Veterinary Studies, Easter Bush Veterinary CentreThe University of EdinburghMidlothianUK
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18
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Alban L, Sauter-Louis C, Brookes VJ, Bartels CJM, Vosough Ahmadi B, Rushton J, Dürr S. Editorial: Bridging Science and Policy for Surveillance, Economics and Social Sciences: ICAHS and ISESSAH 2020. Front Vet Sci 2021; 8:790248. [PMID: 34869754 PMCID: PMC8637403 DOI: 10.3389/fvets.2021.790248] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/06/2021] [Accepted: 10/22/2021] [Indexed: 11/30/2022] Open
Affiliation(s)
- Lis Alban
- Danish Agriculture and Food Council, Copenhagen, Denmark.,Department of Veterinary and Animal Sciences, University of Copenhagen, Copenhagen, Denmark
| | - Carola Sauter-Louis
- Institute of Epidemiology, Friedrich-Loeffler-Institute, Greifswald, Germany
| | - Victoria J Brookes
- Sydney School of Veterinary Science, University of Sydney, Camperdown, NSW, Australia
| | | | - Bouda Vosough Ahmadi
- The European Commission for the Control of Foot and Mouth Disease (EuFMD), Animal Production and Health Division (NSA), Food and Agricultural Organization, Rome, Italy
| | - Jonathan Rushton
- Veterinary and Ecological Sciences, Faculty of Health and Life Sciences, Institute of Infection, University of Liverpool, Liverpool, United Kingdom
| | - Salome Dürr
- Veterinary Public Health Institute, Vetsuisse Faculty, University of Bern, Bern, Switzerland
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19
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Jori F, Hernandez-Jover M, Magouras I, Dürr S, Brookes VJ. Wildlife-livestock interactions in animal production systems: what are the biosecurity and health implications? Anim Front 2021; 11:8-19. [PMID: 34676135 PMCID: PMC8527523 DOI: 10.1093/af/vfab045] [Citation(s) in RCA: 10] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/27/2022] Open
Affiliation(s)
- Ferran Jori
- UMR ASTRE (Animal, Health, Territories, Risks and Ecosystems), Bios Department, CIRAD, INRAE, Campus International de Baillarguet, University de Montpellier, Montpellier, Cedex 5, France
- Department of Zoology and Entomology, University of Pretoria, Hatfield, Gauteng, South Africa
| | - Marta Hernandez-Jover
- School of Agriculture, Environmental and Veterinary Sciences, Charles Sturt University, Wagga Wagga, NSW, Australia
| | - Ioannis Magouras
- Centre for Applied One Health Research and Policy Advice, Department of Infectious Diseases and Public Health, City University of Hong Kong, Kowloon Tong, Hong Kong SAR
| | - Salome Dürr
- Veterinary Public Health Institute, Vetsuisse Faculty, University of Bern, Bern, Switzerland
| | - Victoria J Brookes
- Graham Centre for Agricultural Innovation, Charles Sturt University, Wagga Wagga, NSW, Australia
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20
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Wera E, Warembourg C, Bulu PM, Siko MM, Dürr S. Loss of binding antibodies against rabies in a vaccinated dog population in Flores Island, Indonesia. PLoS Negl Trop Dis 2021; 15:e0009688. [PMID: 34492033 PMCID: PMC8448366 DOI: 10.1371/journal.pntd.0009688] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/22/2020] [Revised: 09/17/2021] [Accepted: 07/27/2021] [Indexed: 12/26/2022] Open
Abstract
Effective parenteral vaccines are available to control rabies in dogs. While such vaccines are successfully used worldwide, the period between vaccine boosters required to guarantee protection of the population against rabies varies between vaccines and populations. In Flores Island, Indonesia, internationally and locally produced rabies vaccines are used during annual vaccination campaigns of predominantly free-roaming owned domestic dogs. The study objective was to identify the duration of the presence and factors associated with the loss of adequate level of binding antibodies (≥0.5 EU/ml) following rabies vaccination in a domestic dog population on Flores Island. A total of 171 dogs that developed an antibody titre higher or equal to 0.5 EU/ml 30 days after vaccination (D30), were repeatedly sampled at day 90, 180, 270, and 360 after vaccination. On the day of vaccination (D0), an interview was performed with dog owners to collect information on dog characteristics (age, sex, body condition score (BCS)), history of rabies vaccination, kind of daily food, frequency of feeding, and origin of the dog. Serum samples were collected and the level of antibodies was quantitatively assessed using ELISA tests. Dogs were categorized as having an adequate level of binding antibodies (≥0.5 EU/ml) or inadequate level of binding antibodies (<0.5 EU/ml) at each time points examined. A total of 115, 72, 23, and 31 dogs were sampled at D90, D180, D270, and D360, respectively, with the highest proportion of antibodies ≥ 0.5 EU/ml (58%, 95% CI, 49-67%) at D90, which reduced gradually until D360 (35%, 95% CI, 19-52%). Multivariable logistic regression models showed that loss of adequate level of binding antibodies is significantly associated with dogs having no history of vaccination or vaccination applied more than 12 months before D0, being less than 12 months of age, and having a poor BCS. These results highlight the importance of BCS regarding the immune response duration and provide insights into frequency of vaccination campaigns required for the internationally available vaccine used on Flores Island. For dogs without vaccination history or vaccination being applied more than 12 months before D0, a booster is recommended within 3 months (a largest drop of antibodies was detected within the first 90 days) after the first vaccination to guarantee measurable protection of the population that lasts at least for one year.
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Affiliation(s)
- Ewaldus Wera
- Animal Health Study Program, Kupang State Agricultural Polytechnic (Politeknik Pertanian Negeri Kupang), Kupang, Indonesia
| | - Charlotte Warembourg
- Veterinary Public Health Institute, Vetsuisse Faculty, University of Bern, Bern, Switzerland
| | - Petrus M. Bulu
- Animal Health Study Program, Kupang State Agricultural Polytechnic (Politeknik Pertanian Negeri Kupang), Kupang, Indonesia
| | - Maria M. Siko
- Animal Health Division, Agricultural Department of Sikka Regency, Maumere, Indonesia
| | - Salome Dürr
- Veterinary Public Health Institute, Vetsuisse Faculty, University of Bern, Bern, Switzerland
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21
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Warembourg C, Fournié G, Abakar MF, Alvarez D, Berger-González M, Odoch T, Wera E, Alobo G, Carvallo ETL, Bal VD, López Hernandez AL, Madaye E, Maximiano Sousa F, Naminou A, Roquel P, Hartnack S, Zinsstag J, Dürr S. Predictors of free-roaming domestic dogs' contact network centrality and their relevance for rabies control. Sci Rep 2021; 11:12898. [PMID: 34145344 PMCID: PMC8213792 DOI: 10.1038/s41598-021-92308-7] [Citation(s) in RCA: 10] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/30/2020] [Accepted: 06/04/2021] [Indexed: 11/17/2022] Open
Abstract
Free roaming domestic dogs (FRDD) are the main vectors for rabies transmission to humans worldwide. To eradicate rabies from a dog population, current recommendations focus on random vaccination with at least 70% coverage. Studies suggest that targeting high-risk subpopulations could reduce the required vaccination coverage, and increase the likelihood of success of elimination campaigns. The centrality of a dog in a contact network can be used as a measure of its potential contribution to disease transmission. Our objectives were to investigate social networks of FRDD in eleven study sites in Chad, Guatemala, Indonesia and Uganda, and to identify characteristics of dogs, and their owners, associated with their centrality in the networks. In all study sites, networks had small-world properties and right-skewed degree distributions, suggesting that vaccinating highly connected dogs would be more effective than random vaccination. Dogs were more connected in rural than urban settings, and the likelihood of contacts was negatively correlated with the distance between dogs' households. While heterogeneity in dog's connectedness was observed in all networks, factors predicting centrality and likelihood of contacts varied across networks and countries. We therefore hypothesize that the investigated dog and owner characteristics resulted in different contact patterns depending on the social, cultural and economic context. We suggest to invest into understanding of the sociocultural structures impacting dog ownership and thus driving dog ecology, a requirement to assess the potential of targeted vaccination in dog populations.
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Affiliation(s)
- Charlotte Warembourg
- Veterinary Public Health Institute, Vetsuisse Faculty, University of Bern, Bern, Switzerland.
| | | | | | - Danilo Alvarez
- Universidad del Valle de Guatemala, Guatemala City, Guatemala
| | - Monica Berger-González
- Universidad del Valle de Guatemala, Guatemala City, Guatemala
- Swiss Tropical and Public Health Institute, Basel, Switzerland
| | - Terence Odoch
- College of Veterinary Medicine, Animal Resources and Biosecurity, Makerere University, Kampala, Uganda
| | - Ewaldus Wera
- Kupang State Agricultural Polytechnic (Politeknik Pertanian Negeri Kupang), West Timor, Indonesia
| | - Grace Alobo
- College of Veterinary Medicine, Animal Resources and Biosecurity, Makerere University, Kampala, Uganda
| | | | | | | | - Enos Madaye
- Institut de Recherche en Elevage pour le Développement, N'Djaména, Chad
| | - Filipe Maximiano Sousa
- Veterinary Public Health Institute, Vetsuisse Faculty, University of Bern, Bern, Switzerland
| | - Abakar Naminou
- Institut de Recherche en Elevage pour le Développement, N'Djaména, Chad
| | - Pablo Roquel
- Universidad del Valle de Guatemala, Guatemala City, Guatemala
| | - Sonja Hartnack
- Section of Epidemiology, Vetsuisse Faculty, University of Zurich, Zurich, Switzerland
| | - Jakob Zinsstag
- Swiss Tropical and Public Health Institute, Basel, Switzerland
| | - Salome Dürr
- Veterinary Public Health Institute, Vetsuisse Faculty, University of Bern, Bern, Switzerland
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22
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Dürr S, Brookes VJ, Perez AM. Editorial: Principles and Challenges of Fundamental Methods in Veterinary Epidemiology and Economics. Front Vet Sci 2021; 8:705980. [PMID: 34195250 PMCID: PMC8236608 DOI: 10.3389/fvets.2021.705980] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/06/2021] [Accepted: 05/21/2021] [Indexed: 11/18/2022] Open
Affiliation(s)
- Salome Dürr
- Veterinary Public Health Institute, Vetsuisse Faculty, University of Bern, Bern, Switzerland
| | - Victoria J Brookes
- Faculty of Science, School of Animal and Veterinary Sciences, Charles Sturt University, Wagga Wagga, NSW, Australia.,Graham Centre for Agricultural Innovation (NSW Department of Primary Industries and Charles Sturt University), Wagga Wagga, NSW, Australia
| | - Andres M Perez
- College of Veterinary Medicine, University of Minnesota, St Paul, MN, United States
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23
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Hitziger M, Berezowski J, Dürr S, Falzon LC, Léchenne M, Lushasi K, Markosyan T, Mbilo C, Momanyi KN, Özçelik R, Prejit N, Zinsstag J, Rüegg SR. System Thinking and Citizen Participation Is Still Missing in One Health Initiatives - Lessons From Fifteen Evaluations. Front Public Health 2021; 9:653398. [PMID: 34150701 PMCID: PMC8211880 DOI: 10.3389/fpubh.2021.653398] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/14/2021] [Accepted: 04/29/2021] [Indexed: 11/24/2022] Open
Abstract
Tackling complex public health challenges requires integrated approaches to health, such as One Health (OH). A key element of these approaches is the integration of knowledge across sectors, disciplines and stakeholders. It is not yet clear which elements of knowledge integration need endorsement to achieve best outcomes. This paper assesses 15 OH initiatives in 16 African, Asian and European countries to identify opportunities to improve knowledge integration and to investigate geographic influences on knowledge integration capacities. Two related evaluation tools, both relying on semi-quantitative questionnaires, were applied to two sets of case studies. In one tool, the questions relate to operations and infrastructure, while the other assigns questions to the three phases of “design,” “implementation,” and “evaluation” of the project life cycle. In both, the question scores are aggregated using medians. For analysis, extreme values were identified to highlight strengths and weaknesses. Seven initiatives were assessed by a single evaluator external to the initiative, and the other eight initiatives were jointly assessed by several internal and external evaluators. The knowledge integration capacity was greatest during the project implementation stage, and lowest during the evaluation stage. The main weaknesses pointing towards concrete potential for improvement were identified to be a lack of consideration of systemic characteristics, missing engagement of external stakeholders and poor bridging of knowledge, amplified by the absence of opportunities to learn and evolve in a collective process. Most users were unfamiliar with the systems approach to evaluation and found the use of the tools challenging, but they appreciated the new perspective and saw benefits in the ensuing reflections. We conclude that systems thinking and associated practises for OH require not only specific education in OH core competencies, but also methodological and institutional measures to endorse broad participation. To facilitate meta-analyses and generic improvement of integrated approaches to health we suggest including knowledge integration processes as elements to report according to the COHERE guidelines.
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Affiliation(s)
- Martin Hitziger
- Section of Epidemiology, Vetsuisse Faculty, University of Zürich, Zurich, Switzerland
| | - John Berezowski
- Veterinary Public Health Institute, Vetsuisse Faculty, University of Bern, Bern, Switzerland
| | - Salome Dürr
- Veterinary Public Health Institute, Vetsuisse Faculty, University of Bern, Bern, Switzerland
| | - Laura C Falzon
- Institute of Infection, Veterinary and Ecological Sciences, University of Liverpool, Liverpool, United Kingdom.,International Livestock Research Institute, Nairobi, Kenya
| | - Monique Léchenne
- Department of Epidemiology and Public Health, Swiss Tropical and Public Health Institute, Basel, Switzerland.,Department of Public Health, Medical Faculty, University of Basel, Basel, Switzerland
| | - Kennedy Lushasi
- Department of Environmental Health and Ecological Sciences, Ifakara Health Institute, Dar es Salaam, Tanzania
| | - Tigran Markosyan
- Scientific Center for Risk Assessment and Analysis in Food Safety Area, Yerevan, Armenia
| | - Céline Mbilo
- Department of Epidemiology and Public Health, Swiss Tropical and Public Health Institute, Basel, Switzerland
| | | | - Ranya Özçelik
- Veterinary Public Health Institute, Vetsuisse Faculty, University of Bern, Bern, Switzerland
| | - Nambiar Prejit
- Centre for One Health Education, Advocacy, Research and Training, Kerala Veterinary and Animal Sciences University, Wayanad, India
| | - Jakob Zinsstag
- Department of Epidemiology and Public Health, Swiss Tropical and Public Health Institute, Basel, Switzerland.,Department of Public Health, Medical Faculty, University of Basel, Basel, Switzerland
| | - Simon R Rüegg
- Section of Epidemiology, Vetsuisse Faculty, University of Zürich, Zurich, Switzerland
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24
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Özçelik R, Remy-Wohlfender F, Küker S, Visschers V, Hadorn D, Dürr S. Potential and Challenges of Community-Based Surveillance in Animal Health: A Pilot Study Among Equine Owners in Switzerland. Front Vet Sci 2021; 8:641448. [PMID: 34150880 PMCID: PMC8212947 DOI: 10.3389/fvets.2021.641448] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/14/2020] [Accepted: 02/28/2021] [Indexed: 11/17/2022] Open
Abstract
Animal owners' potential to observe and report clinical signs, as the persons with the closest contact to their animals, is an often neglected source of information in surveillance. Allowing community members other than health care professionals, such as animal owners, to report health events can contribute to close current surveillance gaps and enhance early detection. In the present study, we tested a community-based surveillance (CBS) approach in the equine community in Switzerland. We aimed at revealing the attitudes and intentions of equine owners toward reporting clinical signs by making use of an online questionnaire. We further set up and operated an online CBS tool, named Equi-Commun. Finally, we investigated potential reasons for the lack of its use by applying qualitative telephone interviews. The majority of the respondents of the online questionnaire (65.5%, 707/1,078) answered that they could see themselves reporting clinical observations of their equine. The multivariate logistic regression analysis indicated that French-speaking equine owners and those belonging to the positive attitude cluster are more likely to report to a CBS tool. Equi-Commun operated between October 2018 and December 2019 yet received only four reports. With the addition of qualitative interviews, we identified three critical, interlinked issues that may have led to the non-use of Equi-Commun within the Swiss equine community: (1) for successfully implementing CBS, the need for surveillance within the community of interest must be given; (2) the respective population under surveillance, here the equine, needs to show enough clinical cases for owners to be able to maintain the memory of an existing tool and its possible use; and (3) targeted and high effort communication of the system is key for its success. While CBS relying only on lay animal owners, complementary to existing surveillance systems, could potentially provide a good proxy of timely surveillance data, it is questionable whether the added value of generated surveillance knowledge is in balance with efforts necessary to implement a successful system. With this study, we showcased both the potential and challenges of CBS in animal health, as this may be of relevance and guidance for future initiatives.
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Affiliation(s)
- Ranya Özçelik
- Veterinary Public Health Institute, Vetsuisse Faculty, University of Bern, Bern, Switzerland
| | | | - Susanne Küker
- Veterinary Public Health Institute, Vetsuisse Faculty, University of Bern, Bern, Switzerland
| | - Vivianne Visschers
- School of Applied Psychology, University of Applied Sciences and Arts Northwestern Switzerland, Olten, Switzerland
| | - Daniela Hadorn
- Federal Food Safety and Veterinary Office, Bern, Switzerland
| | - Salome Dürr
- Veterinary Public Health Institute, Vetsuisse Faculty, University of Bern, Bern, Switzerland
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25
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Muinde P, Bettridge JM, Sousa FM, Dürr S, Dohoo IR, Berezowski J, Mutwiri T, Odinga CO, Fèvre EM, Falzon LC. Who let the dogs out? Exploring the spatial ecology of free-roaming domestic dogs in western Kenya. Ecol Evol 2021; 11:4218-4231. [PMID: 33976805 PMCID: PMC8093722 DOI: 10.1002/ece3.7317] [Citation(s) in RCA: 15] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/17/2020] [Revised: 01/22/2021] [Accepted: 01/26/2021] [Indexed: 11/23/2022] Open
Abstract
The spatial ecology of free-roaming dogs determines their role in the transmission of zoonoses. This study describes the geographic range of and identifies sites frequently visited by free-roaming domestic dogs in western Kenya. Eight sites in Busia county, western Kenya, were selected. At each site, ten dog-keeping households were recruited, a questionnaire was administered, and a GPS logger was fixed around the neck of one dog in each household. Loggers were programmed to capture the dog's position every minute, for five consecutive days. Individual summaries of GPS recordings were produced, and the daily distance traveled was calculated. 50% and 95% utilization distribution isopleths were produced, and the area within these isopleths was extracted to estimate the size of the core and extended Home Ranges (HRs), respectively. Linear regression analyses were performed to identify factors associated with the movement parameters. The centroid points of the 10, 50, and 90% isopleths were reproduced, and the corresponding sites identified on the ground. Seventy-three dogs were included in the final analyses. The median daily distance traveled was 13.5km, while the median core and extended HRs were 0.4 and 9.3 ha, respectively. Older dogs had a larger extended HR and traveled more daily, while the effect of sex on dog movement depended on their neutering status. Dogs spent most of their time at their household; other frequently visited sites included other household compounds, fields, and rubbish dumps. One of the centroids corresponded to a field located across the international Kenya-Uganda border, emphasizing the fluidity across the border in this ecosystem. Multiple dogs visited the same location, highlighting the heterogeneous contact networks between dogs, and between dogs and people. The field data presented are of value both in understanding domestic dog ecology and resource utilization, and in contextualizing infectious and parasitic disease transmission models.
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Affiliation(s)
- Patrick Muinde
- International Livestock Research InstituteNairobiKenya
- Present address:
World Animal ProtectionNairobiKenya
| | - Judy M. Bettridge
- International Livestock Research InstituteNairobiKenya
- Institute of Infection, Veterinary, and Ecological SciencesUniversity of LiverpoolLiverpoolUK
- Present address:
Natural Resources InstituteUniversity of GreenwichChatham MaritimeUK
| | - Filipe M. Sousa
- Veterinary Public Health InstituteUniversity of BernBernSwitzerland
| | - Salome Dürr
- Veterinary Public Health InstituteUniversity of BernBernSwitzerland
| | - Ian R. Dohoo
- Atlantic Veterinary CollegeUniversity of Prince Edward IslandCharlottetownCanada
| | - John Berezowski
- Veterinary Public Health InstituteUniversity of BernBernSwitzerland
| | - Titus Mutwiri
- International Livestock Research InstituteNairobiKenya
- Jomo Kenyatta University of Agriculture and TechnologyNairobiKenya
| | | | - Eric M. Fèvre
- International Livestock Research InstituteNairobiKenya
- Institute of Infection, Veterinary, and Ecological SciencesUniversity of LiverpoolLiverpoolUK
| | - Laura C. Falzon
- International Livestock Research InstituteNairobiKenya
- Institute of Infection, Veterinary, and Ecological SciencesUniversity of LiverpoolLiverpoolUK
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26
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Warembourg C, Wera E, Odoch T, Bulu PM, Berger-González M, Alvarez D, Abakar MF, Maximiano Sousa F, Cunha Silva L, Alobo G, Bal VD, López Hernandez AL, Madaye E, Meo MS, Naminou A, Roquel P, Hartnack S, Dürr S. Comparative Study of Free-Roaming Domestic Dog Management and Roaming Behavior Across Four Countries: Chad, Guatemala, Indonesia, and Uganda. Front Vet Sci 2021; 8:617900. [PMID: 33748208 PMCID: PMC7970034 DOI: 10.3389/fvets.2021.617900] [Citation(s) in RCA: 15] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/15/2020] [Accepted: 01/25/2021] [Indexed: 12/20/2022] Open
Abstract
Dogs play a major role in public health because of potential transmission of zoonotic diseases, such as rabies. Dog roaming behavior has been studied worldwide, including countries in Asia, Latin America, and Oceania, while studies on dog roaming behavior are lacking in Africa. Many of those studies investigated potential drivers for roaming, which could be used to refine disease control measures. However, it appears that results are often contradictory between countries, which could be caused by differences in study design or the influence of context-specific factors. Comparative studies on dog roaming behavior are needed to better understand domestic dog roaming behavior and address these discrepancies. The aim of this study was to investigate dog demography, management, and roaming behavior across four countries: Chad, Guatemala, Indonesia, and Uganda. We equipped 773 dogs with georeferenced contact sensors (106 in Chad, 303 in Guatemala, 217 in Indonesia, and 149 in Uganda) and interviewed the owners to collect information about the dog [e.g., sex, age, body condition score (BCS)] and its management (e.g., role of the dog, origin of the dog, owner-mediated transportation, confinement, vaccination, and feeding practices). Dog home range was computed using the biased random bridge method, and the core and extended home range sizes were considered. Using an AIC-based approach to select variables, country-specific linear models were developed to identify potential predictors for roaming. We highlighted similarities and differences in term of demography, dog management, and roaming behavior between countries. The median of the core home range size was 0.30 ha (95% range: 0.17-0.92 ha) in Chad, 0.33 ha (0.17-1.1 ha) in Guatemala, 0.30 ha (0.20-0.61 ha) in Indonesia, and 0.25 ha (0.15-0.72 ha) in Uganda. The median of the extended home range size was 7.7 ha (95% range: 1.1-103 ha) in Chad, 5.7 ha (1.5-27.5 ha) in Guatemala, 5.6 ha (1.6-26.5 ha) in Indonesia, and 5.7 ha (1.3-19.1 ha) in Uganda. Factors having a significant impact on the home range size in some of the countries included being male dog (positively), being younger than one year (negatively), being older than 6 years (negatively), having a low or a high BCS (negatively), being a hunting dog (positively), being a shepherd dog (positively), and time when the dog was not supervised or restricted (positively). However, the same outcome could have an impact in a country and no impact in another. We suggest that dog roaming behavior is complex and is closely related to the owner's socioeconomic context and transportation habits and the local environment. Free-roaming domestic dogs are not completely under human control but, contrary to wildlife, they strongly depend upon humans. This particular dog-human bound has to be better understood to explain their behavior and deal with free-roaming domestic dogs related issues.
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Affiliation(s)
- Charlotte Warembourg
- Veterinary Public Health Institute, Vetsuisse Faculty, University of Bern, Bern, Switzerland
- Graduate School for Health Sciences, University of Bern, Bern, Switzerland
| | - Ewaldus Wera
- Kupang State Agricultural Polytechnic (Politeknik Pertanian Negeri Kupang), West Timor, Indonesia
| | - Terence Odoch
- College of Veterinary Medicine, Animal Resources and Biosecurity, Makerere University, Kampala, Uganda
| | - Petrus Malo Bulu
- Kupang State Agricultural Polytechnic (Politeknik Pertanian Negeri Kupang), West Timor, Indonesia
| | - Monica Berger-González
- Center for Health Studies, Universidad del Valle de Guatemala, Guatemala City, Guatemala
- Swiss Tropical and Public Health Institute, Basel, Switzerland
| | - Danilo Alvarez
- Center for Health Studies, Universidad del Valle de Guatemala, Guatemala City, Guatemala
| | | | - Filipe Maximiano Sousa
- Veterinary Public Health Institute, Vetsuisse Faculty, University of Bern, Bern, Switzerland
| | - Laura Cunha Silva
- Veterinary Public Health Institute, Vetsuisse Faculty, University of Bern, Bern, Switzerland
- Faculty of Veterinary Medicine, University of Lisbon, Lisbon, Portugal
| | - Grace Alobo
- Kupang State Agricultural Polytechnic (Politeknik Pertanian Negeri Kupang), West Timor, Indonesia
| | - Valentin Dingamnayal Bal
- College of Veterinary Medicine, Animal Resources and Biosecurity, Makerere University, Kampala, Uganda
| | | | - Enos Madaye
- College of Veterinary Medicine, Animal Resources and Biosecurity, Makerere University, Kampala, Uganda
| | - Maria Satri Meo
- Animal Health Division, Agricultural Department of Sikka Regency, Flores, Indonesia
| | - Abakar Naminou
- College of Veterinary Medicine, Animal Resources and Biosecurity, Makerere University, Kampala, Uganda
| | - Pablo Roquel
- Center for Health Studies, Universidad del Valle de Guatemala, Guatemala City, Guatemala
| | - Sonja Hartnack
- Section of Epidemiology, Vetsuisse Faculty, University of Zurich, Zurich, Switzerland
| | - Salome Dürr
- Veterinary Public Health Institute, Vetsuisse Faculty, University of Bern, Bern, Switzerland
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27
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Warembourg C, Wera E, Odoch T, Bulu PM, Berger-González M, Alvarez D, Abakar MF, Maximiano Sousa F, Cunha Silva L, Alobo G, Bal VD, López Hernandez AL, Madaye E, Meo MS, Naminou A, Roquel P, Hartnack S, Dürr S. Comparative Study of Free-Roaming Domestic Dog Management and Roaming Behavior Across Four Countries: Chad, Guatemala, Indonesia, and Uganda. Front Vet Sci 2021. [PMID: 33748208 DOI: 10.3389/fvets.2021.617900/full#b11] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022] Open
Abstract
Dogs play a major role in public health because of potential transmission of zoonotic diseases, such as rabies. Dog roaming behavior has been studied worldwide, including countries in Asia, Latin America, and Oceania, while studies on dog roaming behavior are lacking in Africa. Many of those studies investigated potential drivers for roaming, which could be used to refine disease control measures. However, it appears that results are often contradictory between countries, which could be caused by differences in study design or the influence of context-specific factors. Comparative studies on dog roaming behavior are needed to better understand domestic dog roaming behavior and address these discrepancies. The aim of this study was to investigate dog demography, management, and roaming behavior across four countries: Chad, Guatemala, Indonesia, and Uganda. We equipped 773 dogs with georeferenced contact sensors (106 in Chad, 303 in Guatemala, 217 in Indonesia, and 149 in Uganda) and interviewed the owners to collect information about the dog [e.g., sex, age, body condition score (BCS)] and its management (e.g., role of the dog, origin of the dog, owner-mediated transportation, confinement, vaccination, and feeding practices). Dog home range was computed using the biased random bridge method, and the core and extended home range sizes were considered. Using an AIC-based approach to select variables, country-specific linear models were developed to identify potential predictors for roaming. We highlighted similarities and differences in term of demography, dog management, and roaming behavior between countries. The median of the core home range size was 0.30 ha (95% range: 0.17-0.92 ha) in Chad, 0.33 ha (0.17-1.1 ha) in Guatemala, 0.30 ha (0.20-0.61 ha) in Indonesia, and 0.25 ha (0.15-0.72 ha) in Uganda. The median of the extended home range size was 7.7 ha (95% range: 1.1-103 ha) in Chad, 5.7 ha (1.5-27.5 ha) in Guatemala, 5.6 ha (1.6-26.5 ha) in Indonesia, and 5.7 ha (1.3-19.1 ha) in Uganda. Factors having a significant impact on the home range size in some of the countries included being male dog (positively), being younger than one year (negatively), being older than 6 years (negatively), having a low or a high BCS (negatively), being a hunting dog (positively), being a shepherd dog (positively), and time when the dog was not supervised or restricted (positively). However, the same outcome could have an impact in a country and no impact in another. We suggest that dog roaming behavior is complex and is closely related to the owner's socioeconomic context and transportation habits and the local environment. Free-roaming domestic dogs are not completely under human control but, contrary to wildlife, they strongly depend upon humans. This particular dog-human bound has to be better understood to explain their behavior and deal with free-roaming domestic dogs related issues.
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Affiliation(s)
- Charlotte Warembourg
- Veterinary Public Health Institute, Vetsuisse Faculty, University of Bern, Bern, Switzerland.,Graduate School for Health Sciences, University of Bern, Bern, Switzerland
| | - Ewaldus Wera
- Kupang State Agricultural Polytechnic (Politeknik Pertanian Negeri Kupang), West Timor, Indonesia
| | - Terence Odoch
- College of Veterinary Medicine, Animal Resources and Biosecurity, Makerere University, Kampala, Uganda
| | - Petrus Malo Bulu
- Kupang State Agricultural Polytechnic (Politeknik Pertanian Negeri Kupang), West Timor, Indonesia
| | - Monica Berger-González
- Center for Health Studies, Universidad del Valle de Guatemala, Guatemala City, Guatemala.,Swiss Tropical and Public Health Institute, Basel, Switzerland
| | - Danilo Alvarez
- Center for Health Studies, Universidad del Valle de Guatemala, Guatemala City, Guatemala
| | | | - Filipe Maximiano Sousa
- Veterinary Public Health Institute, Vetsuisse Faculty, University of Bern, Bern, Switzerland
| | - Laura Cunha Silva
- Veterinary Public Health Institute, Vetsuisse Faculty, University of Bern, Bern, Switzerland.,Faculty of Veterinary Medicine, University of Lisbon, Lisbon, Portugal
| | - Grace Alobo
- Kupang State Agricultural Polytechnic (Politeknik Pertanian Negeri Kupang), West Timor, Indonesia
| | - Valentin Dingamnayal Bal
- College of Veterinary Medicine, Animal Resources and Biosecurity, Makerere University, Kampala, Uganda
| | | | - Enos Madaye
- College of Veterinary Medicine, Animal Resources and Biosecurity, Makerere University, Kampala, Uganda
| | - Maria Satri Meo
- Animal Health Division, Agricultural Department of Sikka Regency, Flores, Indonesia
| | - Abakar Naminou
- College of Veterinary Medicine, Animal Resources and Biosecurity, Makerere University, Kampala, Uganda
| | - Pablo Roquel
- Center for Health Studies, Universidad del Valle de Guatemala, Guatemala City, Guatemala
| | - Sonja Hartnack
- Section of Epidemiology, Vetsuisse Faculty, University of Zurich, Zurich, Switzerland
| | - Salome Dürr
- Veterinary Public Health Institute, Vetsuisse Faculty, University of Bern, Bern, Switzerland
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Zanolari P, Dürr S, Jores J, Steiner A, Kuhnert P. Ovine footrot: A review of current knowledge. Vet J 2021; 271:105647. [PMID: 33840488 DOI: 10.1016/j.tvjl.2021.105647] [Citation(s) in RCA: 18] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/21/2020] [Revised: 02/17/2021] [Accepted: 02/18/2021] [Indexed: 12/14/2022]
Abstract
Footrot is a contagious foot disease mainly affecting sheep. It is caused by the Gram-negative anaerobic bacterium Dichelobacter nodosus. Warm, wet environmental conditions favour development of footrot, and under perfect conditions, it takes just 2-3 weeks from infection to manifestation of clinical signs. Affected sheep show lameness of various degrees and often graze while resting on their carpi. Local clinical signs vary in severity and extent from interdigital inflammation (benign footrot) to underrunning of the complete horn shoe in advanced stages of virulent footrot. Laboratory diagnosis ideally involves collection of four-foot interdigital swab samples followed by competitive real time PCR, allowing for detection of the presence of D. nodosus and differentiation between benign and virulent strains. Laboratory-based diagnostics at the flock level based on risk-based sampling and pooling of interdigital swab samples are recommended. The list of treatment options of individual sheep includes careful removal of the loose undermined horn, local or systemic administration of antimicrobials, systemic administration of non-steroidal anti-inflammatories (NSAIDs) and disinfectant footbathing. Strategies for control at the flock level are manifold and depend on the environmental conditions and the procedures traditionally implemented by the respective country. Generally, measures consist of treatment/culling of infected sheep, vaccination and prevention of reinfection of disease-free flocks. Gaining deeper insight into the beneficial effects of NSAIDs, screening for eco-friendly footbath solutions, developing better vaccines, including the development of a robust, reproducible infection model and elucidation of protective immune responses, as well as the elaboration of effective awareness training programs for sheep farmers, are relevant research gaps.
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Affiliation(s)
- Patrik Zanolari
- Clinic for Ruminants, Vetsuisse Faculty, University of Bern, Bern, Switzerland
| | - Salome Dürr
- Veterinary Public Health Institute, Vetsuisse Faculty, University of Bern, Bern, Switzerland
| | - Jörg Jores
- Institute of Veterinary Bacteriology, Vetsuisse Faculty, University of Bern, Bern, Switzerland
| | - Adrian Steiner
- Clinic for Ruminants, Vetsuisse Faculty, University of Bern, Bern, Switzerland.
| | - Peter Kuhnert
- Institute of Veterinary Bacteriology, Vetsuisse Faculty, University of Bern, Bern, Switzerland
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Kirkeby C, Brookes VJ, Ward MP, Dürr S, Halasa T. A Practical Introduction to Mechanistic Modeling of Disease Transmission in Veterinary Science. Front Vet Sci 2021; 7:546651. [PMID: 33575275 PMCID: PMC7870987 DOI: 10.3389/fvets.2020.546651] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/29/2020] [Accepted: 12/21/2020] [Indexed: 11/13/2022] Open
Abstract
Computer-based disease spread models are frequently used in veterinary science to simulate disease spread. They are used to predict the impacts of the disease, plan and assess surveillance, or control strategies, and provide insights about disease causation by comparing model outputs with real life data. There are many types of disease spread models, and here we present and describe the implementation of a particular type: individual-based models. Our aim is to provide a practical introduction to building individual-based disease spread models. We also introduce code examples with the goal to make these techniques more accessible to those who are new to the field. We describe the important steps in building such models before, during and after the programming stage, including model verification (to ensure that the model does what was intended), validation (to investigate whether the model results reflect the modeled system), and convergence analysis (to ensure models of endemic diseases are stable before outputs are collected). We also describe how sensitivity analysis can be used to assess the potential impact of uncertainty about model parameters. Finally, we provide an overview of some interesting recent developments in the field of disease spread models.
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Affiliation(s)
- Carsten Kirkeby
- Department of Veterinary and Animal Sciences, Faculty of Health and Medical Sciences, University of Copenhagen, Frederiksberg, Denmark,*Correspondence: Carsten Kirkeby
| | - Victoria J. Brookes
- School of Animal and Veterinary Sciences, Faculty of Science, Charles Sturt University, Wagga, NSW, Australia,Graham Centre for Agricultural Innovation (Charles Sturt University and NSW Department of Primary Industries), Wagga, NSW, Australia
| | - Michael P. Ward
- Faculty of Veterinary Science, Sydney School of Veterinary Science, University of Sydney, Sydney, NSW, Australia
| | - Salome Dürr
- Department of Clinical Research and Public Health, Veterinary Public Health Institute, University of Bern, Bern, Switzerland
| | - Tariq Halasa
- Department of Veterinary and Animal Sciences, Faculty of Health and Medical Sciences, University of Copenhagen, Frederiksberg, Denmark
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Gerber M, Dürr S, Bodmer M. Reducing Antimicrobial Use by Implementing Evidence-Based, Management-Related Prevention Strategies in Dairy Cows in Switzerland. Front Vet Sci 2021; 7:611682. [PMID: 33537355 PMCID: PMC7847904 DOI: 10.3389/fvets.2020.611682] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/29/2020] [Accepted: 12/15/2020] [Indexed: 02/04/2023] Open
Abstract
The aim of this study was to reduce antimicrobial use (AMU) on dairy farms that implemented evidence-based management strategies. The study not only examined whether these strategies led to a reduction in AMU in practice, but also examined the influence of the level of their implementation on AMU. For data analysis, practice software recordings of the farm veterinarians were used. The AMU data of 50 farms with prevention strategies applied (intervention group, IG) over 3 years (2017–2019) and of 74 farms without prevention strategies (control group, CG) over 2 years (2018–2019) were analyzed. Project participation was supported with 500 Swiss francs (~545 USD) per farmer per year. The AMU was compared between the IG and CG using the treatment incidence. In December 2017/January 2018, the farmers of the IG had chosen at least one of the proposed 17 prevention strategies from one of three sectors, i.e., udder health, uterine health and/or replacement calf health. The prevention strategies, were developed in a standard operating procedure protocol and were discussed in detail with the farmers before the implementation. Forty-eight farms chose at least one udder strategy, 10 farms at least one uterine strategy and 37 farms at least one calf strategy. By choosing an udder health strategy or a uterine health strategy, the corresponding systemically administered AMU could be significantly reduced (p < 0.04) in the IG compared with the CG. In addition, udder strategies that were well-implemented led to a significant reduction (p = 0.05) of intramammary “highest priority critically important antimicrobials (HPCIA)” (quinolones, cephalosporins 3rd and higher generation, macrolides and ketolides, glycopeptides, and polymyxins). The level of implementation was significantly lower in 2019 compared to 2018 (p < 0.05, Fisher's exact test). No significant reduction in AMU could be achieved for the calf sector. A reduction of AMU in dairy farms is possible by implementing evidence-based management-related prevention strategies. The level of implementation has only an influence on the consumption of HPCIA. The reduction of AMU in practice by means of evidence-based measures requires supportive human resources instead of financial support, because financial support for farmers seems not to motivate them sufficiently.
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Affiliation(s)
- Manuela Gerber
- Clinic for Ruminants, Vetsuisse-Faculty, University of Berne, Berne, Switzerland
| | - Salome Dürr
- Veterinary Public Health Institute, Vetsuisse Faculty, University of Bern, Bern, Switzerland
| | - Michèle Bodmer
- Clinic for Ruminants, Vetsuisse-Faculty, University of Berne, Berne, Switzerland
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Magouras I, Brookes VJ, Jori F, Martin A, Pfeiffer DU, Dürr S. Emerging Zoonotic Diseases: Should We Rethink the Animal-Human Interface? Front Vet Sci 2020; 7:582743. [PMID: 33195602 PMCID: PMC7642492 DOI: 10.3389/fvets.2020.582743] [Citation(s) in RCA: 36] [Impact Index Per Article: 9.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/13/2020] [Accepted: 09/03/2020] [Indexed: 12/17/2022] Open
Affiliation(s)
- Ioannis Magouras
- Department of Infectious Diseases and Public Health, City University of Hong Kong, Kowloon, Hong Kong
| | - Victoria J Brookes
- School of Animal and Veterinary Sciences, Faculty of Science, Charles Sturt University, Wagga Wagga, NSW, Australia.,Graham Centre for Agricultural Innovation (NSW Department of Primary Industries and Charles Sturt University), Wagga Wagga, NSW, Australia
| | - Ferran Jori
- UMR ASTRE (Animal, Santé, Territoires, Risques et Ecosystémes), CIRAD-INRAE, Université de Montpellier, Montpellier, France
| | - Angela Martin
- Department of Philosophy, University of Basel, Basel, Switzerland
| | - Dirk Udo Pfeiffer
- Department of Infectious Diseases and Public Health, City University of Hong Kong, Kowloon, Hong Kong
| | - Salome Dürr
- Vetsuisse Faculty, Veterinary Public Health Institute, University of Bern, Bern, Switzerland
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Gerber M, Dürr S, Bodmer M. Decision-Making of Swiss Farmers and the Role of the Veterinarian in Reducing Antimicrobial Use on Dairy Farms. Front Vet Sci 2020; 7:565. [PMID: 33005642 PMCID: PMC7479233 DOI: 10.3389/fvets.2020.00565] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/18/2020] [Accepted: 07/15/2020] [Indexed: 12/31/2022] Open
Abstract
The reduction of antimicrobials on dairy farms is a topical issue and confronts both veterinarians and farmers with major challenges. The aim of this study was to investigate dairy farmers' motivation to reduce antimicrobial use on their farms. Factors influencing dairy farmers' decision-making regarding dairy cow health were identified and the role of the veterinarian in these processes was characterized. A customized structured questionnaire was sent to all participants (n = 59) of an ongoing antimicrobial reduction project among dairy farmers in the Canton of Fribourg, Switzerland, by mail. Fifty-eight completed questionnaires were returned and evaluated (response rate 98.3%). The majority of respondents were men (56/58, 96.6%) and farm managers (55/57, 96.5%) managing their farms as their main occupation (56/57, 98.2%). Using a 5-point-Likert-scale (1 = not a reason, 5 = very important reason), respondents ranked “My veterinarian is putting pressure on us to use less antimicrobials” (median=2.5, interquartile range = 1–3) and “Other farmers also reduce antimicrobial use” (2.0, 1–3) as the least important factors affecting their motivation to reduce the use of antimicrobials in dairy cows (P < 0.001). Respondents ranked their veterinarian's opinion (4.0, 4–5) and their own feelings and knowledge (4.0, 3–4) as the two factors having significantly more importance on their decisions regarding dairy cow management (P < 0.001). The farmers indicated they were satisfied with the quality of the consultancy given by their veterinarians (4.0, 4–5) and with the quality of communication with veterinarians (4.0, 3–4). They indicated that they understood recommendations made by the veterinarian (4.0, 3.75–4) and also felt understood by the veterinarian (4.0, 3–4). However, only 25.9% (14/54) indicated they were willing to pay for good quality, farm-adapted consulting by their veterinarian. Based on these findings, veterinarians play an important role in influencing Swiss dairy farmers in decision-making concerning animal health and treatment. However, veterinarians were not viewed by farmers as important motivators for reducing antimicrobial use. Swiss veterinarians are encouraged to be aware of their influence on farmers' decisions and to use that influence to more clearly promote antimicrobial reduction on dairy farms.
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Affiliation(s)
- Manuela Gerber
- Vetsuisse-Faculty, Clinic for Ruminants, University of Berne, Berne, Switzerland
| | - Salome Dürr
- Vetsuisse-Faculty, Veterinary Public Health Institute, University of Berne, Berne, Switzerland
| | - Michèle Bodmer
- Vetsuisse-Faculty, Clinic for Ruminants, University of Berne, Berne, Switzerland
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Gerber M, Dürr S, Bodmer M. [Survey among livestock veterinarians from the Canton of Fribourg investigating the topics of herd-health management, counselling and the use of antimicrobial drugs]. SCHWEIZ ARCH TIERH 2020; 162:23-36. [PMID: 31899447 DOI: 10.17236/sat00240] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
Abstract
INTRODUCTION The work of veterinarians is continuously undergoing structural changes. A shift from purely curative individual animal care towards herd-health management is observed worldwide in the livestock sector. To illustrate the practical implementation with all its advantages and disadvantages, an online survey was conducted among all practicing livestock veterinarians in the Canton of Fribourg. A link to the survey was sent by email, it was voluntary and possible to complete the questionnaire anonymously. The survey focused on four topics: Demographic data, herd-health management, billing of counselling and use of antimicrobial drugs. Forty veterinarians from at least 79.2% (n = 19) of all veterinary practices located in the canton of Fribourg (n = 24) responded. Of these, 67.5% were practice owners or partner (n = 27) and 32.5% were employed veterinarians (n = 13). In Fribourg, only herd fertility management is included in the herd-health management on a regular basis. The quality and quantity of advanced trainings in herd-health management for veterinarians was assessed as moderate to poor. There are various options for charging herd-health management services. The amount charged was variable. The most frequently used options were hourly rates (100-300 CHF/h), "rate per cow per year excl. visit rate" (22-75 CHF/cow/year) or "rate per cow per year incl. visit rate" (85-98 CHF/ cow/year). Only one veterinarian (2.5%) charges for advisory activities not included in the the herd-health management service, which was asked for separately. However, the time required for counselling (excluding herd-health management) was estimated to be between 5.0-70.0% of the total working time (median 15.0%, interquartile range = 10.0-32.5%). Veterinarians in Fribourg are reHauptluctant to follow the international trend towards a regular, integrated herd-health management. The majority of them do not charge for consultancy outside the herdhealth management service. A nationwide survey should be considered to better assess the situation all over Switzerland.
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Affiliation(s)
- M Gerber
- Wiederkäuerklinik, Vetsuisse-Fakultät, Universität Bern
| | - S Dürr
- Veterinary Public Health Institut (VPHI), Vetsuisse-Fakultät, Universität Bern
| | - M Bodmer
- Wiederkäuerklinik, Vetsuisse-Fakultät, Universität Bern
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Özçelik R, Graubner C, Remy-Wohlfender F, Dürr S, Faverjon C. Evaluating 5.5 Years of Equinella: A Veterinary-Based Voluntary Infectious Disease Surveillance System of Equines in Switzerland. Front Vet Sci 2020; 7:327. [PMID: 32695799 PMCID: PMC7339941 DOI: 10.3389/fvets.2020.00327] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/19/2020] [Accepted: 05/11/2020] [Indexed: 12/03/2022] Open
Abstract
Equine health is important in regard to trade, economy, society, and the veterinary, as well as public health. To reduce the burden of equine infectious diseases internationally, it is important to collect, review, and distribute equine health surveillance data as accurate and timely as possible. Within this study, we aimed at providing a comprehensive descriptive analysis of data submitted to Equinella, a voluntary veterinary-based surveillance system of non-notifiable equine infectious diseases and clinical signs, in Switzerland. This was achieved by reviewing the reports submitted since its relaunch in November 2013 and until April 2019, as well as assessing the data validity, activeness of participating veterinarians, coverage of the equine population, geographical representativeness, and timeliness of the system. In total, 630 reports have been submitted. Data validity ranged between 88.2 and 100%. The coverage of Equinella was assessed to be 50.8% of the Swiss equine population. Over the 5.5 years, of all 102 registered veterinarians, 67 (65.7%) submitted at least one report. On average, these veterinarians submitted 1.7 reports per year (median = 4 reports). More recently, in 2018, approximately only one-third [29 (28.4%)] of all registered veterinarians submitted at least one report. However, 59 (57.8%) have responded to the monthly reminder emails to confirm that they have not observed any relevant clinical case to be reported at least once (median number of confirmation per veterinarian = 9 of 12 reminder emails). The incidence of reports varied between cantons (member states of the Swiss confederation). The median timeliness of report submission was found to be 7 days. Overall, Equinella has been receiving reports since its initiation and contributed continuously to the surveillance of infectious diseases in the Swiss equine population and provided an output for the international equine community. Challenges encountered in achieving a higher number of submitted reports and increasing the coverage of the equine population, as well as the overall activeness of veterinarians, require further work. With our study, we provide a comprehensive overview of a veterinary-based voluntary surveillance system for equine health, assessed challenges of such, and suggest concrete improvements with transdisciplinary approaches for similar veterinary-based surveillance systems.
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Affiliation(s)
- Ranya Özçelik
- Veterinary Public Health Institute, Vetsuisse Faculty, University of Bern, Bern, Switzerland
| | - Claudia Graubner
- ISME-Equine Clinic Bern, Vetsuisse Faculty, University of Bern, Bern, Switzerland
| | | | - Salome Dürr
- Veterinary Public Health Institute, Vetsuisse Faculty, University of Bern, Bern, Switzerland
| | - Céline Faverjon
- Veterinary Public Health Institute, Vetsuisse Faculty, University of Bern, Bern, Switzerland
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Warembourg C, Berger-González M, Alvarez D, Maximiano Sousa F, López Hernández A, Roquel P, Eyerman J, Benner M, Dürr S. Estimation of free-roaming domestic dog population size: Investigation of three methods including an Unmanned Aerial Vehicle (UAV) based approach. PLoS One 2020; 15:e0225022. [PMID: 32267848 PMCID: PMC7141685 DOI: 10.1371/journal.pone.0225022] [Citation(s) in RCA: 14] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/24/2019] [Accepted: 03/16/2020] [Indexed: 11/18/2022] Open
Abstract
Population size estimation is performed for several reasons including disease surveillance and control, for example to design adequate control strategies such as vaccination programs or to estimate a vaccination campaign coverage. In this study, we aimed at investigating the possibility of using Unmanned Aerial Vehicles (UAV) to estimate the size of free-roaming domestic dog (FRDD) populations and compare the results with two regularly used methods for population estimations: foot-patrol transect survey and the human: dog ratio estimation. Three studies sites of one square kilometer were selected in Petén department, Guatemala. A door-to-door survey was conducted in which all available dogs were marked with a collar and owner were interviewed. The day after, UAV flight were performed twice during two consecutive days per study site. The UAV's camera was set to regularly take pictures and cover the entire surface of the selected areas. Simultaneously to the UAV's flight, a foot-patrol transect survey was performed and the number of collared and non-collared dogs were recorded. Data collected during the interviews and the number of dogs counted during the foot-patrol transects informed a capture-recapture (CR) model fit into a Bayesian inferential framework to estimate the dog population size, which was found to be 78, 259, and 413 in the three study sites. The difference of the CR model estimates compared to previously available dog census count (110 and 289) can be explained by the fact that the study population addressed by the different methods differs. The human: dog ratio covered the same study population as the dog census and tended to underestimate the FRDD population size (97 and 161). Under the conditions within this study, the total number of dogs identified on the UAV pictures was 11, 96, and 71 for the three regions (compared to the total number of dogs counted during the foot-patrol transects of 112, 354 and 211). In addition, the quality of the UAV pictures was not sufficient to assess the presence of a mark on the spotted dogs. Therefore, no CR model could be implemented to estimate the size of the FRDD using UAV. We discussed ways for improving the use of UAV for this purpose, such as flying at a lower altitude in study area wisely chosen. We also suggest to investigate the possibility of using infrared camera and automatic detection of the dogs to increase visibility of the dogs in the pictures and limit workload of finding them. Finally, we discuss the need of using models, such as spatial capture-recapture models to obtain reliable estimates of the FRDD population. This publication may provide helpful directions to design dog population size estimation methods using UAV.
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Affiliation(s)
- Charlotte Warembourg
- Veterinary Public Health Institute, Vetsuisse Faculty, University of Bern, Bern, Switzerland
| | - Monica Berger-González
- Universidad del Valle, Guatemala City, Guatemala
- Swiss Tropical and Public Health Institute, University of Basel, Basel, Switzerland
| | | | - Filipe Maximiano Sousa
- Veterinary Public Health Institute, Vetsuisse Faculty, University of Bern, Bern, Switzerland
| | | | - Pablo Roquel
- Universidad del Valle, Guatemala City, Guatemala
| | - Joe Eyerman
- RTI International, Seattle, Washington DC, United States of America
| | - Merlin Benner
- Remote Intelligence, LLC, Wellsboro, Pennsylvania, United States of America
| | - Salome Dürr
- Veterinary Public Health Institute, Vetsuisse Faculty, University of Bern, Bern, Switzerland
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Moore-Jones G, Ardüser F, Dürr S, Gobeli Brawand S, Steiner A, Zanolari P, Ryser-Degiorgis MP. Identifying maintenance hosts for infection with Dichelobacter nodosus in free-ranging wild ruminants in Switzerland: A prevalence study. PLoS One 2020; 15:e0219805. [PMID: 31917824 PMCID: PMC6952115 DOI: 10.1371/journal.pone.0219805] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/27/2019] [Accepted: 12/16/2019] [Indexed: 12/14/2022] Open
Abstract
Footrot is a worldwide economically important, painful, contagious bacterial foot disease of domestic and wild ungulates caused by Dichelobacter nodosus. Benign and virulent strains have been identified in sheep presenting with mild and severe lesions, respectively. However, in Alpine ibex (Capra ibex ibex), both strains have been associated with severe lesions. Because the disease is widespread throughout sheep flocks in Switzerland, a nationwide footrot control program for sheep focusing on virulent strains shall soon be implemented. The aim of this cross-sectional study was to estimate the nationwide prevalence of both strain groups of D. nodosus in four wild indigenous ruminant species and to identify potential susceptible wildlife maintenance hosts that could be a reinfection source for domestic sheep. During two years (2017–2018), interdigital swabs of 1,821 wild indigenous ruminant species (Alpine ibex, Alpine chamois (Rupicapra rupicapra), roe deer (Capreolus capreolus), red deer (Cervus elaphus)) were analysed by Real-Time PCR. Furthermore, observed interspecies interactions were documented for each sample. Overall, we report a low prevalence of D. nodosus in all four indigenous wild ruminants, for both benign (1.97%, N = 36, of which 31 red deer) and virulent (0.05%, N = 1 ibex) strains. Footrot lesions were documented in one ibex with virulent strains, and in one ibex with benign strains. Interspecific interactions involving domestic livestock occurred mainly with cattle and sheep. In conclusion, the data suggest that wild ungulates are likely irrelevant for the maintenance and spread of D. nodosus. Furthermore, we add evidence that both D. nodosus strain types can be associated with severe disease in Alpine ibex. These data are crucial for the upcoming nationwide control program and reveal that wild ruminants should not be considered as a threat to footrot control in sheep in this context.
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Affiliation(s)
- Gaia Moore-Jones
- Centre for Fish and Wildlife Health, Vetsuisse-Faculty, University of Bern, Bern, Switzerland
| | - Flurin Ardüser
- Clinic for Ruminants, Vetsuisse-Faculty, University of Bern, Bern, Switzerland
| | - Salome Dürr
- Veterinary Public Health Institute, Vetsuisse-Faculty, University of Bern, Liebefeld, Switzerland
| | - Stefanie Gobeli Brawand
- Institute of Veterinary Bacteriology, Vetsuisse-Faculty, University of Bern, Bern, Switzerland
| | - Adrian Steiner
- Clinic for Ruminants, Vetsuisse-Faculty, University of Bern, Bern, Switzerland
| | - Patrik Zanolari
- Clinic for Ruminants, Vetsuisse-Faculty, University of Bern, Bern, Switzerland
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Härdi-Landerer MC, Stoffel A, Dürr S, Steiner A. [Footbath as treatment of footrot in sheep. Current -situation on Swiss sheep farms]. SCHWEIZ ARCH TIERH 2019; 161:377-386. [PMID: 31145680 DOI: 10.17236/sat00210] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
Abstract
INTRODUCTION Footrot in sheep should be eradicated in Switzerland in the future. Based on scientific findings, this can be achieved with disinfectant footbaths. It is unknown how many sheep farmers are already using this means and how it is used. The current study evaluated the farm operation, the design of the footbath, the use of disinfectants and footbath with a written survey of a representative sample of all sheep farmers. The sample population was selected randomly, however stratified by language region and herdsize to control for differences between these groups. 45.3% (n=1134) of the distributed questionnaires were received for evaluation. On average 32.8% of the respondents used a footbath. Even on large farms (> 50 animals), which were more frequently affected by footrot, a footbath was available only in 52.6% of the farms in the French-speaking part and 67.7% in the German/Italian speaking part of Switzerland. The footbaths were correctly applied in most respects (e.g., pre-claw cleaning, liquid level and concentration of disinfectants, time in the footbath, post-bath drying phase) in the current study. Most commonly mobile plastic baths were in use. The disinfectants used were mainly formalin, copper and zinc sulfate. The incorrect disposal of the heavy-metal containing copper and zinc sulfate solutions was identified as an important problem: In 59% of the sheep farms the remaining footbath solutions were disposed in the slurry pit or manure storage. In summary the current study recommends (i) to motivate sheep farmers to use a footbath for the treatment and prevention of footrot, and (ii) to replace the currently used disinfectants with substances that are non-toxic to humans, animals and the environment.
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Affiliation(s)
| | - A Stoffel
- Institut für Agrarwissenschaften, D-USYS, ETH Zürich
| | - S Dürr
- Veterinary Public Health Institut (VPHI), Vetsuisse-Fakultät, Universität Bern
| | - A Steiner
- Nutztierklinik, Vetsuisse-Fakultät, Universität Bern
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Brookes VJ, Dürr S, Ward MP. Rabies-induced behavioural changes are key to rabies persistence in dog populations: Investigation using a network-based model. PLoS Negl Trop Dis 2019; 13:e0007739. [PMID: 31545810 PMCID: PMC6776358 DOI: 10.1371/journal.pntd.0007739] [Citation(s) in RCA: 18] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/09/2019] [Revised: 10/03/2019] [Accepted: 08/29/2019] [Indexed: 11/19/2022] Open
Abstract
Canine rabies was endemic pre-urbanisation, yet little is known about how it persists in small populations of dogs typically seen in rural and remote regions. By simulating rabies outbreaks in such populations (50-90 dogs) using a network-based model, our objective was to determine if rabies-induced behavioural changes influence disease persistence. Behavioural changes-increased bite frequency and increased number or duration of contacts (disease-induced roaming or paralysis, respectively)-were found to be essential for disease propagation. Spread occurred in approximately 50% of model simulations and in these, very low case rates (2.0-2.6 cases/month) over long durations (95% range 20-473 days) were observed. Consequently, disease detection is a challenge, risking human infection and spread to other communities via dog movements. Even with 70% pre-emptive vaccination, spread occurred in >30% of model simulations (in these, median case rate was 1.5/month with 95% range of 15-275 days duration). We conclude that the social disruption caused by rabies-induced behavioural change is the key to explaining how rabies persists in small populations of dogs. Results suggest that vaccination of substantially greater than the recommended 70% of dog populations is required to prevent rabies emergence in currently free rural areas.
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Affiliation(s)
- Victoria J. Brookes
- Sydney School of Veterinary Science, The University of Sydney, Camden, Australia
- School of Animal and Veterinary Sciences, Faculty of Science, Charles Sturt University, Wagga Wagga, Australia
| | - Salome Dürr
- Veterinary Public Health Institute, University of Bern, Liebefeld, Switzerland
| | - Michael P. Ward
- Sydney School of Veterinary Science, The University of Sydney, Camden, Australia
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Hudson EG, Brookes VJ, Dürr S, Ward MP. Modelling targeted rabies vaccination strategies for a domestic dog population with heterogeneous roaming patterns. PLoS Negl Trop Dis 2019; 13:e0007582. [PMID: 31283780 PMCID: PMC6638970 DOI: 10.1371/journal.pntd.0007582] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/14/2019] [Revised: 07/18/2019] [Accepted: 06/27/2019] [Indexed: 11/23/2022] Open
Abstract
Australia is currently canine rabies free. However, communities located on the northern coastline-such as the Northern Peninsula Area (NPA), Queensland-are at risk of an incursion due to their large populations of susceptible free-roaming dogs and proximity to rabies-infected Indonesian islands. A rabies-spread model was used to simulate potential outbreaks and evaluate various disease control strategies. A heterogeneous contact structure previously described in the population of interest-explorer dogs, roamer dogs and stay-at-home dogs-was incorporated into the model using six spatial kernels describing contacts between dog roaming categories. Twenty-seven vaccination strategies were investigated based on a complete block design of 50%, 70% and 90% coverage for each of the three roaming categories to simulate various targeted vaccination strategies. The 27 strategies were implemented in four population structures in which the proportion of dogs in each category varied-explorer dominant, roamer dominant, stay-at-home dominant and a field population (based on field estimates of population structure). The overall vaccination coverage varied depending on the subpopulation targeted for vaccination and the population structure modelled. A total of 108 scenarios were simulated 2000 times and the model outputs (outbreak size and duration) were compared to Strategy 14 (a standard recommended overall 70% vaccination coverage). In general, targeting explorer dogs-and to a lesser extent roamer dogs-produced similar outbreaks to Strategy 14 but with a lower overall vaccination coverage. Similarly, strategies that targeted stay-at-home dogs required a higher vaccination coverage to produce significantly smaller and shorter outbreaks. This study provides some theoretical evidence that targeting subpopulations of dogs for vaccination based on their roaming behaviours (and therefore risk of rabies transmission) could be more efficient than blanket 70% vaccination campaigns. Such information can be used in preparedness planning to help improve control of a potential rabies incursion in Australia.
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Affiliation(s)
- Emily G. Hudson
- Sydney School of Veterinary Science, The University of Sydney, Camden, Australia
| | - Victoria J. Brookes
- Sydney School of Veterinary Science, The University of Sydney, Camden, Australia
- Veterinary Public Health Institute, University of Bern, Liebefeld, Switzerland
| | - Salome Dürr
- Charles Sturt University, School of Animal and Veterinary Sciences, Faculty of Science, Wagga Wagga, NSW 2678, Australia
| | - Michael P. Ward
- Sydney School of Veterinary Science, The University of Sydney, Camden, Australia
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Ardüser F, Moore-Jones G, Gobeli Brawand S, Dürr S, Steiner A, Ryser-Degiorgis MP, Zanolari P. Dichelobacter nodosus in sheep, cattle, goats and South American camelids in Switzerland-Assessing prevalence in potential hosts in order to design targeted disease control measures. Prev Vet Med 2019; 178:104688. [PMID: 31109750 DOI: 10.1016/j.prevetmed.2019.05.001] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/11/2019] [Revised: 04/29/2019] [Accepted: 05/02/2019] [Indexed: 10/26/2022]
Abstract
Footrot is a contagious foot disease caused by the bacterium Dichelobacter nodosus (D. nodosus) that affects sheep worldwide. Due to substantial economic and welfare impact, various countries have developed control programs against footrot. The aim of this cross-sectional study was to estimate the national prevalence of virulent and benign D. nodosus in Switzerland in the four domestic ruminant species sheep, cattle, goats and South American camelids (SAC) to detect potential host populations and to propose targeted disease control measures. Risk factors for infection with the virulent strain of D. nodosus, based on a survey carried out among farmers, were investigated on animal and herd level. Overall, 613 farms and 2920 animals were investigated during 2017-18 applying a two-stage cluster sampling strategy. A Real-Time PCR method for simultaneous detection of virulent and benign strains of D. nodosus was used for the first time in such a large study. On animal level, the true prevalence (TP) of virulent D. nodosus in sheep was estimated at 16.9% (95% confidence interval (CI95%): 9.5-24.3%). In cattle and goats no virulent D. nodosus was detected and in SAC an apparent prevalence (AP) of 0.2% (CI95%: 0.0-0.4%) was observed. On farm level, a TP of virulent D. nodosus of 16.2% (CI95%: 8.4-25.2%) for sheep and an AP of 1.5% (CI95%: 0.3-5.2%) for SAC herds was estimated. Since the Swiss control program only targets the virulent strains of D. nodosus, it was concluded that cattle, goats and SAC do not play a role in footrot epidemiology in Switzerland. Adult sheep were at higher risk of infection for virulent D. nodosus compared to lambs and yearlings. On herd level, risk factors for infection with virulent D. nodosus in sheep were earlier occurence of footrot, winter compared to summer and autumn, and goat contact on pasture. Liming pastures had a protective effect on D. nodosus infection. For benign D. nodosus, the TP in sheep was 6.3% (CI95%: 1.6-11.0%) and in cattle 88.4% (CI95%: 83.8-93.0%). The TP for benign D. nodosus in sheep farms was 2.8% (CI95%: 0.0-10.5%) and in cattle farms 95.9% (CI95%: 91.7-98.1%). In goat and SAC farms, the AP was 6.6% (CI95%: 3.4-11.5%) and 7.4% (CI95%: 3.8-13.1%), respectively. These findings could be relevant for wild ruminants such as Alpine ibex (Capra ibex ibex), which can develop clinical footrot after infection with benign D. nodosus. The findings of this study are crucial for assessing targeted disease control measures in Switzerland.
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Affiliation(s)
- Flurin Ardüser
- Clinic for Ruminants, Vetsuisse-Faculty, University of Bern, Bremgartenstrasse 109a, 3012 Bern, Switzerland
| | - Gaia Moore-Jones
- Centre for Fish and Wildlife Health (FIWI), Vetsuisse-Faculty, University of Bern, Länggassstrasse 122, Postfach, 3001 Bern, Switzerland
| | - Stefanie Gobeli Brawand
- Institute of Veterinary Bacteriology, Vetsuisse-Faculty, University of Bern, Länggassstrasse 122, Postfach, 3001 Bern, Switzerland
| | - Salome Dürr
- Veterinary Public Health Institute, Vetsuisse-Faculty, University of Bern, Schwarzenburgstrasse 155, 3097 Liebefeld, Switzerland
| | - Adrian Steiner
- Clinic for Ruminants, Vetsuisse-Faculty, University of Bern, Bremgartenstrasse 109a, 3012 Bern, Switzerland
| | - Marie-Pierre Ryser-Degiorgis
- Centre for Fish and Wildlife Health (FIWI), Vetsuisse-Faculty, University of Bern, Länggassstrasse 122, Postfach, 3001 Bern, Switzerland
| | - Patrik Zanolari
- Clinic for Ruminants, Vetsuisse-Faculty, University of Bern, Bremgartenstrasse 109a, 3012 Bern, Switzerland.
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Affiliation(s)
- Tariq Halasa
- National Veterinary Institute, Technical University of Denmark, Kongens Lyngby, Denmark
| | - Salome Dürr
- Veterinary Public Health Institute, University of Bern, Bern, Switzerland
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Bombara C, Dürr S, Gongora J, Ward MP. Roaming of dogs in remote Indigenous communities in northern Australia and potential interaction between community and wild dogs. Aust Vet J 2017; 95:182-188. [PMID: 28555947 DOI: 10.1111/avj.12592] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/28/2016] [Revised: 07/18/2016] [Accepted: 08/07/2016] [Indexed: 11/29/2022]
Abstract
OBJECTIVE To investigate the roaming of Indigenous community dogs and potential interaction with wild dogs and dingoes. DESIGN Cross-sectional survey and longitudinal follow-up study. METHODS Six remote Indigenous communities in Cape York Peninsula and Arnhem Land in northern Australia were selected. Hair samples were collected from community dogs and microsatellite DNA analyses were used to determine hybrid (>10% dingo DNA) status. Dogs were fitted with GPS collars and home range (ha) was estimated during monitoring periods of up to 3 days. RESULTS In Cape York Peninsula, 6% of the 35 dogs sampled were dingo hybrids, whereas in Arnhem Land 41% of the 29 dogs sampled were hybrids. The median extended home range was estimated to be 4.54 ha (interquartile range, 3.40 - 7.71). Seven community dogs were identified with an estimated home range > 20 ha and home ranges included the bushland surrounding communities. No significant difference in home ranges was detected between hybrid and non-hybrid dogs. CONCLUSIONS Study results provide some evidence (dingo hybridisation, bushland forays) of the potential interaction between domestic and wild dogs in northern Australia. The nature of this interaction needs further investigation to determine its role in disease transmission; for example, in the case of a rabies incursion in this region.
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Affiliation(s)
- C Bombara
- School of Veterinary Science, The University of Sydney, Camden, New South Wales, Australia
| | - S Dürr
- School of Veterinary Science, The University of Sydney, Camden, New South Wales, Australia.,Veterinary Public Health Institute, University of Bern, Liebefeld, Switzerland
| | - J Gongora
- School of Veterinary Science, The University of Sydney, Camperdown, NSW, Australia
| | - M P Ward
- School of Veterinary Science, The University of Sydney, Camden, New South Wales, Australia
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Affiliation(s)
- Salome Dürr
- Veterinary Public Health Institute, University of Bern, Bern, Switzerland
| | - Anna S Fahrion
- Neglected Zoonotic Diseases, Department of Control of Neglected Tropical Diseases, World Health Organization, Geneva, Switzerland
| | - Lea Knopf
- Neglected Zoonotic Diseases, Department of Control of Neglected Tropical Diseases, World Health Organization, Geneva, Switzerland
| | - Louise H Taylor
- Global Alliance for Rabies Control, Manhattan, KS, United States
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Bombara CB, Dürr S, Machovsky-Capuska GE, Jones PW, Ward MP. A preliminary study to estimate contact rates between free-roaming domestic dogs using novel miniature cameras. PLoS One 2017; 12:e0181859. [PMID: 28750073 PMCID: PMC5547700 DOI: 10.1371/journal.pone.0181859] [Citation(s) in RCA: 15] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/09/2017] [Accepted: 07/07/2017] [Indexed: 11/22/2022] Open
Abstract
Information on contacts between individuals within a population is crucial to inform disease control strategies, via parameterisation of disease spread models. In this study we investigated the use of dog-borne video cameras–in conjunction with global positioning systems (GPS) loggers–to both characterise dog-to-dog contacts and to estimate contact rates. We customized miniaturised video cameras, enclosed within 3D-printed plastic cases, and attached these to nylon dog collars. Using two 3400 mAh NCR lithium Li-ion batteries, cameras could record a maximum of 22 hr of continuous video footage. Together with a GPS logger, collars were attached to six free roaming domestic dogs (FRDDs) in two remote Indigenous communities in northern Australia. We recorded a total of 97 hr of video footage, ranging from 4.5 to 22 hr (mean 19.1) per dog, and observed a wide range of social behaviours. The majority (69%) of all observed interactions between community dogs involved direct physical contact. Direct contact behaviours included sniffing, licking, mouthing and play fighting. No contacts appeared to be aggressive, however multiple teeth baring incidents were observed during play fights. We identified a total of 153 contacts–equating to 8 to 147 contacts per dog per 24 hr–from the videos of the five dogs with camera data that could be analysed. These contacts were attributed to 42 unique dogs (range 1 to 19 per video) which could be identified (based on colour patterns and markings). Most dog activity was observed in urban (houses and roads) environments, but contacts were more common in bushland and beach environments. A variety of foraging behaviours were observed, included scavenging through rubbish and rolling on dead animal carcasses. Identified food consumed included chicken, raw bones, animal carcasses, rubbish, grass and cheese. For characterising contacts between FRDD, several benefits of analysing videos compared to GPS fixes alone were identified in this study, including visualisation of the nature of the contact between two dogs; and inclusion of a greater number of dogs in the study (which do not need to be wearing video or GPS collars). Some limitations identified included visualisation of contacts only during daylight hours; the camera lens being obscured on occasion by the dog’s mandible or the dog resting on the camera; an insufficiently wide viewing angle (36°); battery life and robustness of the deployments; high costs of the deployment; and analysis of large volumes of often unsteady video footage. This study demonstrates that dog-borne video cameras, are a feasible technology for estimating and characterising contacts between FRDDs. Modifying camera specifications and developing new analytical methods will improve applicability of this technology for monitoring FRDD populations, providing insights into dog-to-dog contacts and therefore how disease might spread within these populations.
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Affiliation(s)
- Courtenay B. Bombara
- Sydney School of Veterinary Science, The University of Sydney, Camden, Australia
| | - Salome Dürr
- Veterinary Public Health Institute, University of Bern, Liebefeld, Switzerland
| | - Gabriel E. Machovsky-Capuska
- Sydney School of Veterinary Science, The University of Sydney, Camden, Australia
- The Charles Perkins Centre and School of Life and Environmental Sciences, The University of Sydney, Sydney, Australia
| | - Peter W. Jones
- School of Electrical and Information Engineering, The University of Sydney, Sydney, Australia
| | - Michael P. Ward
- Sydney School of Veterinary Science, The University of Sydney, Camden, Australia
- * E-mail:
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Hudson EG, Brookes VJ, Dürr S, Ward MP. Domestic dog roaming patterns in remote northern Australian indigenous communities and implications for disease modelling. Prev Vet Med 2017; 146:52-60. [PMID: 28992928 DOI: 10.1016/j.prevetmed.2017.07.010] [Citation(s) in RCA: 29] [Impact Index Per Article: 4.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/11/2017] [Revised: 07/13/2017] [Accepted: 07/16/2017] [Indexed: 11/28/2022]
Abstract
Although Australia is canine rabies free, the Northern Peninsula Area (NPA), Queensland and other northern Australian communities are at risk of an incursion due to proximity to rabies infected islands of Indonesia and existing disease spread pathways. Northern Australia also has large populations of free-roaming domestic dogs, presenting a risk of rabies establishment and maintenance should an incursion occur. Agent-based rabies spread models are being used to predict potential outbreak size and identify effective control strategies to aid incursion preparedness. A key component of these models is knowledge of dog roaming patterns to inform contact rates. However, a comprehensive understanding of how dogs utilise their environment and the heterogeneity of their movements to estimate contact rates is lacking. Using a novel simulation approach - and GPS data collected from 21 free-roaming domestic dogs in the NPA in 2014 and 2016 - we characterised the roaming patterns within this dog population. Multiple subsets from each individual dog's GPS dataset were selected representing different monitoring durations and a utilisation distribution (UD) and derived core (50%) and extended (95%) home ranges (HR) were estimated for each duration. Three roaming patterns were identified, based on changes in mean HR over increased monitoring durations, supported by assessment of maps of daily UDs of each dog. Stay-at-home dogs consolidated their HR around their owner's residence, resulting in a decrease in mean HR (both core and extended) as monitoring duration increased (median peak core and extended HR 0.336 and 3.696ha, respectively). Roamer dogs consolidated their core HR but their extended HR increased with longer monitoring durations, suggesting that their roaming patterns based on place of residence were more variable (median peak core and extended HR 0.391 and 6.049ha, respectively). Explorer dogs demonstrated large variability in their roaming patterns, with both core and extended HR increasing as monitoring duration increased (median peak core and extended HR 0.650 and 9.520ha, respectively). These findings are likely driven by multiple factors that have not been further investigated within this study. Different roaming patterns suggest heterogeneous contact rates between dogs in this population. These findings will be incorporated into disease-spread modelling to more realistically represent roaming patterns and improve model predictions.
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Affiliation(s)
- Emily G Hudson
- Sydney School of Veterinary Science, The University of Sydney, Camden, Australia.
| | - Victoria J Brookes
- Sydney School of Veterinary Science, The University of Sydney, Camden, Australia
| | - Salome Dürr
- Veterinary Public Health Institute, University of Bern, Liebefeld, Switzerland
| | - Michael P Ward
- Sydney School of Veterinary Science, The University of Sydney, Camden, Australia
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Zingg D, Steinbach S, Kuhlgatz C, Rediger M, Schüpbach-Regula G, Aepli M, Grøneng GM, Dürr S. Epidemiological and Economic Evaluation of Alternative On-Farm Management Scenarios for Ovine Footrot in Switzerland. Front Vet Sci 2017; 4:70. [PMID: 28560223 PMCID: PMC5432651 DOI: 10.3389/fvets.2017.00070] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/07/2016] [Accepted: 04/24/2017] [Indexed: 11/13/2022] Open
Abstract
Footrot is a multifactorial infectious disease mostly affecting sheep, caused by the bacteria Dichelobacter nodosus. It causes painful feet lesions resulting in animal welfare issues, weight loss, and reduced wool production, which leads to a considerable economic burden in animal production. In Switzerland, the disease is endemic and mandatory coordinated control programs exist only in some parts of the country. This study aimed to compare two nationwide control strategies and a no intervention scenario with the current situation, and to quantify their net economic effect. This was done by sequential application of a maximum entropy model (MEM), epidemiological simulation, and calculation of net economic effect using the net present value method. Building upon data from a questionnaire, the MEM revealed a nationwide footrot prevalence of 40.2%. Regional prevalence values were used as inputs for the epidemiological model. Under the application of the nationwide coordinated control program without (scenario B) and with (scenario C) improved diagnostics [polymerase chain reaction (PCR) test], the Swiss-wide prevalence decreased within 10 years to 14 and 5%, respectively. Contrary, an increase to 48% prevalence was observed when terminating the current control strategies (scenario D). Management costs included labor and material costs. Management benefits included reduction of fattening time and improved animal welfare, which is valued by Swiss consumers and therefore reduces societal costs. The net economic effect of the alternative scenarios B and C was positive, the one of scenario D was negative and over a period of 17 years quantified at CHF 422.3, 538.3, and -172.3 million (1 CHF = 1.040 US$), respectively. This implies that a systematic Swiss-wide management program under the application of the PCR diagnostic test is the most recommendable strategy for a cost-effective control of footrot in Switzerland.
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Affiliation(s)
- Dana Zingg
- Veterinary Public Health Institute, University of Bern, Bern, Switzerland
| | - Sandro Steinbach
- Center of Economic Research, Swiss Federal Institute of Technology in Zurich, Zurich, Switzerland
| | - Christian Kuhlgatz
- Agricultural Economics, Swiss Federal Institute of Technology in Zurich, Institute for Environmental Decisions (IED), Zurich, Switzerland
| | - Matthias Rediger
- Agricultural Economics, Swiss Federal Institute of Technology in Zurich, Institute for Environmental Decisions (IED), Zurich, Switzerland
| | | | - Matteo Aepli
- Agricultural Economics, Swiss Federal Institute of Technology in Zurich, Institute for Environmental Decisions (IED), Zurich, Switzerland
| | - Gry M Grøneng
- Norwegian Veterinary Institute, Oslo, Norway.,The Norwegian Institute of Public Health, Oslo, Norway
| | - Salome Dürr
- Veterinary Public Health Institute, University of Bern, Bern, Switzerland
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47
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Fahrion AS, Taylor LH, Torres G, Müller T, Dürr S, Knopf L, de Balogh K, Nel LH, Gordoncillo MJ, Abela-Ridder B. The Road to Dog Rabies Control and Elimination-What Keeps Us from Moving Faster? Front Public Health 2017; 5:103. [PMID: 28555183 PMCID: PMC5430047 DOI: 10.3389/fpubh.2017.00103] [Citation(s) in RCA: 39] [Impact Index Per Article: 5.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/07/2016] [Accepted: 04/18/2017] [Indexed: 12/25/2022] Open
Abstract
Rabies, a vaccine preventable neglected tropical disease, still claims an estimated 35,000-60,000 human lives annually. The international community, with more than 100 endemic countries, has set a global target of 0 human deaths from dog-transmitted rabies by 2030. While it has been proven in several countries and regions that elimination of rabies as a public health problem is feasible and tools are available, rabies deaths globally have not yet been prevented effectively. While there has been extensive rabies research, specific areas of implementation for control and elimination have not been sufficiently addressed. This article highlights some of the commonest perceived barriers for countries to implementing rabies control and elimination programs and discusses possible solutions for sociopolitical, organizational, technical, and resource-linked requirements, following the pillars of the global framework for the elimination of dog-mediated human rabies adopted at the global rabies meeting in December 2015.
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Affiliation(s)
- Anna S. Fahrion
- Neglected Zoonotic Diseases, Department of Control of Neglected Tropical Diseases, World Health Organization, Geneva, Switzerland
| | | | | | - Thomas Müller
- Institute of Epidemiology, Friedrich-Löffler-Institut, Federal Research Institute for Animal Health, Greifswald, Germany
| | - Salome Dürr
- Veterinary Public Health Institute, University of Bern, Bern, Switzerland
| | - Lea Knopf
- Neglected Zoonotic Diseases, Department of Control of Neglected Tropical Diseases, World Health Organization, Geneva, Switzerland
| | - Katinka de Balogh
- Food and Agriculture Organization of the United Nations, Bangkok, Thailand
| | - Louis H. Nel
- Global Alliance for Rabies Control, Manhattan, KS, USA
- Department of Microbiology and Plant Pathology, Natural and Agricultural Sciences, University of Pretoria, Pretoria, South Africa
| | | | - Bernadette Abela-Ridder
- Neglected Zoonotic Diseases, Department of Control of Neglected Tropical Diseases, World Health Organization, Geneva, Switzerland
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Abstract
In many regions of the world domestic dogs are free roaming and live in close relationship with humans. These free-roaming domestic dogs (FRDD) can cause public health problems such as dog bites and transmission of infectious diseases. To effectively control diseases transmitted by FRDD, knowledge on the dogs' behaviour is required. To identify predictors of home range (HR) size, we collected global positioning system data from 135 FRDD living in eight Aboriginal and Torres Strait Islander communities in Northern Australia. The core HR size ranged from 0·17 to 2·33 ha and the extended HR size from 0·86 to 40·46 ha. Using a linear mixed effect model with a Restricted Maximum Likelihood approach, the dog's sex and reproductive status were identified as predictors of roaming. Non-castrated males had the largest HRs, followed by neutered females. Also, FRDDs were found to roam further during the pre- than the post-wet season. These findings have implications for infectious disease spread. Identification of risk groups for disease spread within a population allows for more targeted disease response and surveillance. Further investigation of predictors of roaming in other FRDD populations worldwide would increase the external validity of such studies.
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Affiliation(s)
- S Dürr
- Veterinary Public Health Institute, Vetsuisse Faculty,University of Bern,Switzerland
| | - N K Dhand
- Sydney School of Veterinary Science,The University of Sydney,Australia
| | - C Bombara
- Sydney School of Veterinary Science,The University of Sydney,Australia
| | - S Molloy
- Sydney School of Veterinary Science,The University of Sydney,Australia
| | - M P Ward
- Sydney School of Veterinary Science,The University of Sydney,Australia
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49
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Molloy S, Burleigh A, Dürr S, Ward MP. Roaming behaviour of dogs in four remote Aboriginal communities in the Northern Territory, Australia: preliminary investigations. Aust Vet J 2017; 95:55-63. [PMID: 28239863 DOI: 10.1111/avj.12562] [Citation(s) in RCA: 29] [Impact Index Per Article: 4.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/31/2015] [Revised: 05/22/2016] [Accepted: 07/12/2016] [Indexed: 11/27/2022]
Abstract
OBJECTIVE To estimate the home range (HR) and investigate the potential predictors for roaming of 58 dogs in four Aboriginal communities in the Northern Territory. DESIGN Prospective study. PROCEDURE Global positioning system (GPS) collars were attached to the dogs for 1-4 days, recording location fixes every 1-3 min. Utilisation distributions (UDs) and extended (95% isopleth) and core (50% isopleth) HRs of dogs were determined. Potential predictors of roaming were assessed. RESULTS Estimated core (median, 0.27 ha) and extended (median, 3.1 ha) HRs differed significantly (P = 0.0225 and 0.0345, respectively) between the four communities; dogs in the coastal community travelled significantly (P < 0.0001) more per day than dogs in the three inland communities studied. Significant associations were found between extended HR size and sex (P = 0.0050) and sex + neuter (P = 0.0218), and between core HR size and sex (P = 0.0010), neuter status (P = 0.0255) and sex + neuter (P = 0.0025). Entire males roamed more than neutered females. The core HR of dogs with poor/fair body condition scores (BCSs) was larger than dogs with ideal/obese BCSs (P = 0.0394). Neutered male dogs also travelled more per day than entire female dogs (P = 0.0475). CONCLUSIONS Roaming information can be used to inform the management of dogs in remote communities and to design disease control programs. Widespread data collection across the Northern Territory should be undertaken to further investigate the associations found in this study, considering that data were collected during relatively short periods of time in one season.
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Affiliation(s)
- S Molloy
- The University of Sydney, School of Veterinary Science, Camden, NSW 2570, Australia
| | - A Burleigh
- Aboriginal Community Veterinary Services, Katherine, Northern Territory, Australia
| | - S Dürr
- University of Bern, Veterinary Public Health Institute, Bern, Switzerland
| | - M P Ward
- The University of Sydney, School of Veterinary Science, Camden, NSW 2570, Australia
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50
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Aoki S, Aoki Y, Bečirević D, Bernard C, Blum T, Colangelo G, Della Morte M, Dimopoulos P, Dürr S, Fukaya H, Golterman M, Gottlieb S, Hashimoto S, Heller UM, Horsley R, Jüttner A, Kaneko T, Lellouch L, Leutwyler H, Lin CJD, Lubicz V, Lunghi E, Mawhinney R, Onogi T, Pena C, Sachrajda CT, Sharpe SR, Simula S, Sommer R, Vladikas A, Wenger U, Wittig H. Review of lattice results concerning low-energy particle physics: Flavour Lattice Averaging Group (FLAG). Eur Phys J C Part Fields 2017; 77:112. [PMID: 29033670 PMCID: PMC5588406 DOI: 10.1140/epjc/s10052-016-4509-7] [Citation(s) in RCA: 82] [Impact Index Per Article: 11.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/06/2016] [Accepted: 11/11/2016] [Indexed: 06/07/2023]
Abstract
We review lattice results related to pion, kaon, D- and B-meson physics with the aim of making them easily accessible to the particle-physics community. More specifically, we report on the determination of the light-quark masses, the form factor [Formula: see text], arising in the semileptonic [Formula: see text] transition at zero momentum transfer, as well as the decay constant ratio [Formula: see text] and its consequences for the CKM matrix elements [Formula: see text] and [Formula: see text]. Furthermore, we describe the results obtained on the lattice for some of the low-energy constants of [Formula: see text] and [Formula: see text] Chiral Perturbation Theory. We review the determination of the [Formula: see text] parameter of neutral kaon mixing as well as the additional four B parameters that arise in theories of physics beyond the Standard Model. The latter quantities are an addition compared to the previous review. For the heavy-quark sector, we provide results for [Formula: see text] and [Formula: see text] (also new compared to the previous review), as well as those for D- and B-meson-decay constants, form factors, and mixing parameters. These are the heavy-quark quantities most relevant for the determination of CKM matrix elements and the global CKM unitarity-triangle fit. Finally, we review the status of lattice determinations of the strong coupling constant [Formula: see text].
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Affiliation(s)
- S. Aoki
- Center for Gravitational Physics, Yukawa Institute for Theoretical Physics, Kyoto University, Kitashirakawa Oiwakecho, Sakyo-ku, Kyoto, 606-8502 Japan
| | - Y. Aoki
- Kobayashi-Maskawa Institute for the Origin of Particles and the Universe (KMI), Nagoya University, Nagoya, 464-8602 Japan
- Brookhaven National Laboratory, RIKEN BNL Research Center, Upton, NY 11973 USA
- High Energy Accelerator Research Organization (KEK), Tsukuba, 305-0801 Japan
| | - D. Bečirević
- Laboratoire de Physique Théorique (UMR8627), CNRS, Université Paris-Sud, Université Paris-Saclay, 91405 Orsay, France
| | - C. Bernard
- Department of Physics, Washington University, Saint Louis, MO 63130 USA
| | - T. Blum
- Brookhaven National Laboratory, RIKEN BNL Research Center, Upton, NY 11973 USA
- Physics Department, University of Connecticut, Storrs, CT 06269-3046 USA
| | - G. Colangelo
- Albert Einstein Center for Fundamental Physics, Institut für Theoretische Physik, Universität Bern, Sidlerstr. 5, 3012 Bern, Switzerland
| | - M. Della Morte
- CP3-Origins and Danish IAS, University of Southern Denmark, Campusvej 55, 5230 Odense M, Denmark
- IFIC (CSIC), c/ Catedrático José Beltrán, 2, 46980 Paterna, Spain
| | - P. Dimopoulos
- Centro Fermi-Museo Storico della Fisica e Centro Studi e Ricerche Enrico Fermi Compendio del Viminale, Piazza del Viminiale 1, 00184 Rome, Italy
- c/o Dipartimento di Fisica, Università di Roma Tor Vergata, Via della Ricerca Scientifica 1, 00133 Rome, Italy
| | - S. Dürr
- University of Wuppertal, Gaußstraße 20, 42119 Wuppertal, Germany
- Jülich Supercomputing Center, Forschungszentrum Jülich, 52425 Jülich, Germany
| | - H. Fukaya
- Department of Physics, Osaka University, Toyonaka, Osaka 560-0043 Japan
| | - M. Golterman
- Department of Physics and Astronomy, San Francisco State University, San Francisco, CA 94132 USA
| | - Steven Gottlieb
- Department of Physics, Indiana University, Bloomington, IN 47405 USA
| | - S. Hashimoto
- High Energy Accelerator Research Organization (KEK), Tsukuba, 305-0801 Japan
- School of High Energy Accelerator Science, The Graduate University for Advanced Studies (Sokendai), Tsukuba, 305-0801 Japan
| | - U. M. Heller
- American Physical Society (APS), One Research Road, Ridge, NY 11961 USA
| | - R. Horsley
- Higgs Centre for Theoretical Physics, School of Physics and Astronomy, University of Edinburgh, Edinburgh, EH9 3FD UK
| | - A. Jüttner
- School of Physics and Astronomy, University of Southampton, Southampton, SO17 1BJ UK
| | - T. Kaneko
- High Energy Accelerator Research Organization (KEK), Tsukuba, 305-0801 Japan
- School of High Energy Accelerator Science, The Graduate University for Advanced Studies (Sokendai), Tsukuba, 305-0801 Japan
| | - L. Lellouch
- Centre de Physique Théorique, UMR 7332, CNRS, Aix-Marseille Université, Université de Toulon, 13288 Marseille, France
| | - H. Leutwyler
- Albert Einstein Center for Fundamental Physics, Institut für Theoretische Physik, Universität Bern, Sidlerstr. 5, 3012 Bern, Switzerland
| | - C.-J. D. Lin
- Centre de Physique Théorique, UMR 7332, CNRS, Aix-Marseille Université, Université de Toulon, 13288 Marseille, France
- Institute of Physics, National Chiao-Tung University, Hsinchu, 30010 Taiwan
| | - V. Lubicz
- Dipartimento di Matematica e Fisica, Università Roma Tre, Via della Vasca Navale 84, 00146 Rome, Italy
- Sezione di Roma Tre, INFN, Via della Vasca Navale 84, 00146 Rome, Italy
| | - E. Lunghi
- Department of Physics, Indiana University, Bloomington, IN 47405 USA
| | - R. Mawhinney
- Physics Department, Columbia University, New York, NY 10027 USA
| | - T. Onogi
- Department of Physics, Osaka University, Toyonaka, Osaka 560-0043 Japan
| | - C. Pena
- Departamento de Física Teórica, Instituto de Física Teórica UAM/CSIC, Universidad Autónoma de Madrid, Cantoblanco, 28049 Madrid, Spain
| | - C. T. Sachrajda
- School of Physics and Astronomy, University of Southampton, Southampton, SO17 1BJ UK
| | - S. R. Sharpe
- Physics Department, University of Washington, Seattle, WA 98195-1560 USA
| | - S. Simula
- Sezione di Roma Tre, INFN, Via della Vasca Navale 84, 00146 Rome, Italy
| | - R. Sommer
- John von Neumann Institute for Computing (NIC), DESY, Platanenallee 6, 15738 Zeuthen, Germany
| | - A. Vladikas
- Sezione di Tor Vergata, INFN, c/o Dipartimento di Fisica, Università di Roma Tor Vergata, Via della Ricerca Scientifica 1, 00133 Rome, Italy
| | - U. Wenger
- Albert Einstein Center for Fundamental Physics, Institut für Theoretische Physik, Universität Bern, Sidlerstr. 5, 3012 Bern, Switzerland
| | - H. Wittig
- PRISMA Cluster of Excellence, Institut für Kernphysik and Helmholtz Institute Mainz, University of Mainz, 55099 Mainz, Germany
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