1
|
De Maio FA, Winter M, Abate S, Birochio D, Iglesias NG, Barrio DA, Bellusci CP. Torque teno sus virus k2a (TTSuVk2a) in wild boars from northeastern Patagonia, Argentina. Braz J Microbiol 2024; 55:981-989. [PMID: 38286944 PMCID: PMC10920574 DOI: 10.1007/s42770-024-01261-w] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/19/2023] [Accepted: 01/14/2024] [Indexed: 01/31/2024] Open
Abstract
Torque teno sus virus k2a (TTSuVk2a) is a member of the family Anelloviridae that can establish persistent infections in both domestic pigs and wild boars. Its association with diseases has not been precisely elucidated, and it is often considered only as a commensal virus. This infectious agent has been reported in herds throughout the world. In this study, we investigated the detection rate and diversity of TTSuVk2a in free-living wild boars from northeastern Patagonia, Argentina. Total DNA was extracted from tonsil samples of 50 animals, nested PCR assays were carried out, and infection was verified in 60% of the cases. Sequence analysis of the viral non-coding region revealed distinct phylogenetic groups. These clusters showed contrasting patterns of spatial distribution, which presented statistically significant differences when evaluating spatial aggregation. In turn, the sequences were compared with those available in the database to find that the clusters were distinguished by having similarity with TTSuVk2a variants of different geographic origin. The results suggested that Patagonian wild boar populations are bearers of diverse viral strains of Asian, European, and South American provenance.
Collapse
Affiliation(s)
- Federico Andrés De Maio
- Universidad Nacional de Río Negro, Sede Atlántica, Centro de Investigaciones y Transferencia Río Negro (CONICET-UNRN), Ruta Provincial N°1 y Rotonda Cooperación, CP 8500, Viedma, Río Negro, Argentina
- Consejo Nacional de Investigaciones Científicas y Técnicas (CONICET), Ciudad Autónoma de Buenos Aires, Argentina
| | - Marina Winter
- Universidad Nacional de Río Negro, Sede Atlántica, Centro de Investigaciones y Transferencia Río Negro (CONICET-UNRN), Ruta Provincial N°1 y Rotonda Cooperación, CP 8500, Viedma, Río Negro, Argentina
- Consejo Nacional de Investigaciones Científicas y Técnicas (CONICET), Ciudad Autónoma de Buenos Aires, Argentina
| | - Sergio Abate
- Universidad Nacional de Río Negro, Sede Atlántica, Centro de Investigaciones y Transferencia Río Negro (CONICET-UNRN), Ruta Provincial N°1 y Rotonda Cooperación, CP 8500, Viedma, Río Negro, Argentina
| | - Diego Birochio
- Universidad Nacional de Río Negro, Sede Atlántica, Centro de Investigaciones y Transferencia Río Negro (CONICET-UNRN), Ruta Provincial N°1 y Rotonda Cooperación, CP 8500, Viedma, Río Negro, Argentina
| | - Néstor Gabriel Iglesias
- Consejo Nacional de Investigaciones Científicas y Técnicas (CONICET), Ciudad Autónoma de Buenos Aires, Argentina
- Laboratorio de Virología Molecular, Instituto de Biotecnología, Universidad Nacional de Hurlingham (UNAHUR), Buenos Aires, Argentina
| | - Daniel Alejandro Barrio
- Universidad Nacional de Río Negro, Sede Atlántica, Centro de Investigaciones y Transferencia Río Negro (CONICET-UNRN), Ruta Provincial N°1 y Rotonda Cooperación, CP 8500, Viedma, Río Negro, Argentina
- Consejo Nacional de Investigaciones Científicas y Técnicas (CONICET), Ciudad Autónoma de Buenos Aires, Argentina
| | - Carolina Paula Bellusci
- Universidad Nacional de Río Negro, Sede Atlántica, Centro de Investigaciones y Transferencia Río Negro (CONICET-UNRN), Ruta Provincial N°1 y Rotonda Cooperación, CP 8500, Viedma, Río Negro, Argentina.
| |
Collapse
|
2
|
Adamu AM, Firth C, Gummow B, Hickson RI, Hoskins AJ, Horwood PF. Feral pigs as a reservoir for zoonotic and transboundary diseases in the Western Pacific Region. Western Pac Surveill Response J 2024; 15:1-3. [PMID: 38562911 PMCID: PMC10982950 DOI: 10.5365/wpsar.2024.15.1.1114] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 04/04/2024] Open
Affiliation(s)
- Andrew M Adamu
- College of Public Health, Medical and Veterinary Sciences, James Cook University, Townsville, Queensland, Australia
- Australian Institute of Tropical Health and Medicine, James Cook University, Townsville, Queensland, Australia
| | - Cadhla Firth
- College of Public Health, Medical and Veterinary Sciences, James Cook University, Townsville, Queensland, Australia
- EcoHealth Alliance, New York City, New York, United States of America
| | - Bruce Gummow
- College of Public Health, Medical and Veterinary Sciences, James Cook University, Townsville, Queensland, Australia
| | - Roslyn I Hickson
- Australian Institute of Tropical Health and Medicine, James Cook University, Townsville, Queensland, Australia
- Commonwealth Scientific Industrial Research Organisation, Townsville, Queensland, Australia
| | - Andrew J Hoskins
- College of Public Health, Medical and Veterinary Sciences, James Cook University, Townsville, Queensland, Australia
- Commonwealth Scientific Industrial Research Organisation, Townsville, Queensland, Australia
| | - Paul F Horwood
- College of Public Health, Medical and Veterinary Sciences, James Cook University, Townsville, Queensland, Australia
- Australian Institute of Tropical Health and Medicine, James Cook University, Townsville, Queensland, Australia
| |
Collapse
|
3
|
Álvarez B, Revilla C, Poderoso T, Ezquerra A, Domínguez J. Porcine Macrophage Markers and Populations: An Update. Cells 2023; 12:2103. [PMID: 37626913 PMCID: PMC10453229 DOI: 10.3390/cells12162103] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/06/2023] [Revised: 08/04/2023] [Accepted: 08/17/2023] [Indexed: 08/27/2023] Open
Abstract
Besides its importance as a livestock species, pig is increasingly being used as an animal model for biomedical research. Macrophages play critical roles in immunity to pathogens, tissue development, homeostasis and tissue repair. These cells are also primary targets for replication of viruses such as African swine fever virus, classical swine fever virus, and porcine respiratory and reproductive syndrome virus, which can cause huge economic losses to the pig industry. In this article, we review the current status of knowledge on porcine macrophages, starting by reviewing the markers available for their phenotypical characterization and following with the characteristics of the main macrophage populations described in different organs, as well as the effect of polarization conditions on their phenotype and function. We will also review available cell lines suitable for studies on the biology of porcine macrophages and their interaction with pathogens.
Collapse
Affiliation(s)
| | | | | | - Angel Ezquerra
- Departamento de Biotecnología, CSIC INIA, Ctra. De La Coruña, km7.5, 28040 Madrid, Spain; (B.Á.); (C.R.); (T.P.); (J.D.)
| | | |
Collapse
|
4
|
Shurson GC, Urriola PE, Schroeder DC. Biosecurity and Mitigation Strategies to Control Swine Viruses in Feed Ingredients and Complete Feeds. Animals (Basel) 2023; 13:2375. [PMID: 37508151 PMCID: PMC10376163 DOI: 10.3390/ani13142375] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/16/2023] [Revised: 07/17/2023] [Accepted: 07/19/2023] [Indexed: 07/30/2023] Open
Abstract
No system nor standardized analytical procedures at commercial laboratories exist to facilitate and accurately measure potential viable virus contamination in feed ingredients and complete feeds globally. As a result, there is high uncertainty of the extent of swine virus contamination in global feed supply chains. Many knowledge gaps need to be addressed to improve our ability to prevent virus contamination and transmission in swine feed. This review summarizes the current state of knowledge involving: (1) the need for biosecurity protocols to identify production, processing, storage, and transportation conditions that may cause virus contamination of feed ingredients and complete feed; (2) challenges of measuring virus inactivation; (3) virus survival in feed ingredients during transportation and storage; (4) minimum infectious doses; (5) differences between using a food safety objective versus a performance objective as potential approaches for risk assessment in swine feed; (6) swine virus inactivation from thermal and irradiation processes, and chemical mitigants in feed ingredients and complete feed; (7) efficacy of virus decontamination strategies in feed mills; (8) benefits of functional ingredients, nutrients, and commercial feed additives in pig diets during a viral health challenge; and (9) considerations for improved risk assessment models of virus contamination in feed supply chains.
Collapse
Affiliation(s)
- Gerald C Shurson
- Department of Animal Science, University of Minnesota, St. Paul, MN 55108, USA
| | - Pedro E Urriola
- Department of Animal Science, University of Minnesota, St. Paul, MN 55108, USA
| | - Declan C Schroeder
- Department of Veterinary Population Medicine, University of Minnesota, St. Paul, MN 55108, USA
| |
Collapse
|
5
|
De Maio FA, Winter M, Abate S, Cifuentes S, Iglesias NG, Barrio DA, Bellusci CP. Detection of porcine circovirus 2, porcine parvovirus 1, and torque teno sus virus k2a in wild boars from northeastern Patagonia, Argentina. Arch Virol 2023; 168:208. [PMID: 37462757 DOI: 10.1007/s00705-023-05831-5] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/20/2023] [Accepted: 06/06/2023] [Indexed: 07/21/2023]
Abstract
Wild boars can act as a reservoir of pathogenic viruses that affect the pig industry. Here, we assessed the presence of porcine circovirus 2, porcine parvovirus 1, and torque teno sus virus k2a in wild boars in northeastern Patagonia (Argentina). Total DNA was extracted from the tonsils of 27 animals (collected between early 2016 and mid-2019) and used to prepare sample pools, which were subjected to viral detection through two-round PCR assays. Sequencing of the amplification products and phylogenetic analysis confirmed the occurrence of all of the aforementioned infectious agents.
Collapse
Affiliation(s)
- Federico Andrés De Maio
- Universidad Nacional de Río Negro, Sede Atlántica, Centro de Investigaciones y Transferencia Río Negro (CONICET-UNRN), Ruta provincial N°1 y Rotonda Cooperación, CP 8500, Viedma, Río Negro, Argentina
- Consejo Nacional de Investigaciones Científicas y Técnicas (CONICET), Ciudad Autónoma de Buenos Aires, Argentina
| | - Marina Winter
- Universidad Nacional de Río Negro, Sede Atlántica, Centro de Investigaciones y Transferencia Río Negro (CONICET-UNRN), Ruta provincial N°1 y Rotonda Cooperación, CP 8500, Viedma, Río Negro, Argentina
- Consejo Nacional de Investigaciones Científicas y Técnicas (CONICET), Ciudad Autónoma de Buenos Aires, Argentina
| | - Sergio Abate
- Universidad Nacional de Río Negro, Sede Atlántica, Centro de Investigaciones y Transferencia Río Negro (CONICET-UNRN), Ruta provincial N°1 y Rotonda Cooperación, CP 8500, Viedma, Río Negro, Argentina
| | - Sabrina Cifuentes
- Universidad Nacional de Río Negro, Sede Atlántica, Centro de Investigaciones y Transferencia Río Negro (CONICET-UNRN), Ruta provincial N°1 y Rotonda Cooperación, CP 8500, Viedma, Río Negro, Argentina
- Consejo Nacional de Investigaciones Científicas y Técnicas (CONICET), Ciudad Autónoma de Buenos Aires, Argentina
| | - Néstor Gabriel Iglesias
- Consejo Nacional de Investigaciones Científicas y Técnicas (CONICET), Ciudad Autónoma de Buenos Aires, Argentina
- Universidad Nacional de Hurlingham (UNAHUR), Buenos Aires, Argentina
| | - Daniel Alejandro Barrio
- Universidad Nacional de Río Negro, Sede Atlántica, Centro de Investigaciones y Transferencia Río Negro (CONICET-UNRN), Ruta provincial N°1 y Rotonda Cooperación, CP 8500, Viedma, Río Negro, Argentina
- Consejo Nacional de Investigaciones Científicas y Técnicas (CONICET), Ciudad Autónoma de Buenos Aires, Argentina
| | - Carolina Paula Bellusci
- Universidad Nacional de Río Negro, Sede Atlántica, Centro de Investigaciones y Transferencia Río Negro (CONICET-UNRN), Ruta provincial N°1 y Rotonda Cooperación, CP 8500, Viedma, Río Negro, Argentina.
| |
Collapse
|
6
|
Puspitarani GA, Fuchs R, Fuchs K, Ladinig A, Desvars-Larrive A. Network analysis of pig movement data as an epidemiological tool: an Austrian case study. Sci Rep 2023; 13:9623. [PMID: 37316653 PMCID: PMC10267221 DOI: 10.1038/s41598-023-36596-1] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/23/2023] [Accepted: 06/06/2023] [Indexed: 06/16/2023] Open
Abstract
Animal movements represent a major risk for the spread of infectious diseases in the domestic swine population. In this study, we adopted methods from social network analysis to explore pig trades in Austria. We used a dataset of daily records of swine movements covering the period 2015-2021. We analyzed the topology of the network and its structural changes over time, including seasonal and long-term variations in the pig production activities. Finally, we studied the temporal dynamics of the network community structure. Our findings show that the Austrian pig production was dominated by small-sized farms while spatial farm density was heterogeneous. The network exhibited a scale-free topology but was very sparse, suggesting a moderate impact of infectious disease outbreaks. However, two regions (Upper Austria and Styria) may present a higher structural vulnerability. The network also showed very high assortativity between holdings from the same federal state. Dynamic community detection revealed a stable behavior of the clusters. Yet trade communities did not correspond to sub-national administrative divisions and may be an alternative zoning approach to managing infectious diseases. Knowledge about the topology, contact patterns, and temporal dynamics of the pig trade network can support optimized risk-based disease control and surveillance strategies.
Collapse
Affiliation(s)
- Gavrila A Puspitarani
- Unit of Veterinary Public Health and Epidemiology, University of Veterinary Medicine Vienna, Veterinaerplatz 1, 1210, Vienna, Austria.
- Complexity Science Hub Vienna, Josefstaedter Strasse 39, 1080, Vienna, Austria.
| | - Reinhard Fuchs
- Department for Data, Statistics and Risk Assessment, Austrian Agency for Health and Food Safety (AGES), Zinzendorfgasse 27/1, 8010, Graz, Austria
- Institute of Systems Sciences, Innovation and Sustainability Research, University of Graz, Merangasse 18/1, 8010, Graz, Austria
| | - Klemens Fuchs
- Department for Data, Statistics and Risk Assessment, Austrian Agency for Health and Food Safety (AGES), Zinzendorfgasse 27/1, 8010, Graz, Austria
| | - Andrea Ladinig
- University Clinic for Swine, University of Veterinary Medicine Vienna, Veterinaerplatz 1, 1210, Vienna, Austria
| | - Amélie Desvars-Larrive
- Unit of Veterinary Public Health and Epidemiology, University of Veterinary Medicine Vienna, Veterinaerplatz 1, 1210, Vienna, Austria
- Complexity Science Hub Vienna, Josefstaedter Strasse 39, 1080, Vienna, Austria
- VetFarm, University of Veterinary Medicine Vienna, Kremesberg 13, 2563, Pottenstein, Austria
| |
Collapse
|
7
|
Acosta A, Dietze K, Baquero O, Osowski GV, Imbacuan C, Burbano A, Ferreira F, Depner K. Risk Factors and Spatiotemporal Analysis of Classical Swine Fever in Ecuador. Viruses 2023; 15:288. [PMID: 36851503 PMCID: PMC9966056 DOI: 10.3390/v15020288] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/21/2022] [Revised: 01/10/2023] [Accepted: 01/15/2023] [Indexed: 01/21/2023] Open
Abstract
Classical swine fever (CSF) is one of the most important re-emergent swine diseases worldwide. Despite concerted control efforts in the Andean countries, the disease remains endemic in several areas, limiting production and trade opportunities. In this study, we aimed to determine the risk factors and spatiotemporal implications associated with CSF in Ecuador. We analysed passive surveillance and vaccination campaign datasets from 2014 to 2020; Then, we structured a herd-level case-control study using a logistic and spatiotemporal Bayesian model. The results showed that the risk factors that increased the odds of CSF occurrence were the following: swill feeding (OR 8.53), time until notification (OR 2.44), introduction of new pigs during last month (OR 2.01) and lack of vaccination against CSF (OR 1.82). The spatiotemporal model showed that vaccination reduces the risk by 33%. According to the priority index, the intervention should focus on Morona Santiago and Los Rios provinces. In conclusion, the results highlight the complexity of the CSF control programs, the importance to improve the overall surveillance system and the need to inform decision-makers and stakeholders.
Collapse
Affiliation(s)
- Alfredo Acosta
- Institute of International Animal Health/One Health, Friedrich-Loeffler-Institut, 17493 Greifswald, Germany
- Laboratory of Epidemiology and Biostatistics, School of Veterinary Medicine and Animal Science, Preventive Veterinary Medicine Department, University of São Paulo, São Paulo 05508-270, Brazil
| | - Klaas Dietze
- Institute of International Animal Health/One Health, Friedrich-Loeffler-Institut, 17493 Greifswald, Germany
| | - Oswaldo Baquero
- Laboratory of Epidemiology and Biostatistics, School of Veterinary Medicine and Animal Science, Preventive Veterinary Medicine Department, University of São Paulo, São Paulo 05508-270, Brazil
| | - Germana Vizzotto Osowski
- Laboratory of Epidemiology and Biostatistics, School of Veterinary Medicine and Animal Science, Preventive Veterinary Medicine Department, University of São Paulo, São Paulo 05508-270, Brazil
| | - Christian Imbacuan
- General Coordination of Animal Health, Phyto-Zoosanitary Regulation and Control Agency, Quito 170903, Ecuador
| | - Alexandra Burbano
- General Coordination of Animal Health, Phyto-Zoosanitary Regulation and Control Agency, Quito 170903, Ecuador
| | - Fernando Ferreira
- Laboratory of Epidemiology and Biostatistics, School of Veterinary Medicine and Animal Science, Preventive Veterinary Medicine Department, University of São Paulo, São Paulo 05508-270, Brazil
| | - Klaus Depner
- Institute of International Animal Health/One Health, Friedrich-Loeffler-Institut, 17493 Greifswald, Germany
| |
Collapse
|
8
|
Zhang P, Nie T, Ma J, Chen H. Identification of suitable areas for African swine fever occurrence in china using geographic information system-based multi-criteria analysis. Prev Vet Med 2022; 209:105794. [DOI: 10.1016/j.prevetmed.2022.105794] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/28/2022] [Revised: 09/28/2022] [Accepted: 10/28/2022] [Indexed: 11/06/2022]
|
9
|
Loi F, Di Sabatino D, Baldi I, Rolesu S, Gervasi V, Guberti V, Cappai S. Estimation of R 0 for the Spread of the First ASF Epidemic in Italy from Fresh Carcasses. Viruses 2022; 14:2240. [PMID: 36298795 PMCID: PMC9607429 DOI: 10.3390/v14102240] [Citation(s) in RCA: 6] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/02/2022] [Revised: 10/08/2022] [Accepted: 10/09/2022] [Indexed: 10/29/2023] Open
Abstract
After fifty years of spread in the European continent, the African swine fever (ASF) virus was detected for the first time in the north of Italy (Piedmont) in a wild boar carcass in December, 2021. During the first six months of the epidemic, the central role of wild boars in disease transmission was confirmed by more than 200 outbreaks, which occurred in two different areas declared as infected. The virus entered a domestic pig farm in the second temporal cluster identified in the center of the country (Lazio). Understanding ASF dynamics in wild boars is a prerequisite for preventing the spread, and for designing and applying effective surveillance and control plans. The aim of this work was to describe and evaluate the data collected during the first six months of the ASF epidemic in Italy, and to estimate the basic reproduction number (R0) in order to quantify the extent of disease spread. The R0 estimates were significantly different for the two spatio-temporal clusters of ASF in Italy, and they identified the two infected areas based on the time necessary for the number of cases to double (td) and on an exponential decay model. These results (R0 = 1.41 in Piedmont and 1.66 in Lazio) provide quantitative knowledge on the epidemiology of ASF in Italy. These parameters could represent a fundamental tool for modeling country-specific ASF transmission and for monitoring both the spread and sampling effort needed to detect the disease early.
Collapse
Affiliation(s)
- Federica Loi
- Osservatorio Epidemiologico Veterinario Regionale della Sardegna, Istituto Zooprofilattico Sperimentale della Sardegna, 07100 Sassari, Italy
- Istituto Zooprofilattico Sperimentale dell’Abruzzo e del Molise G. Caporale, 64100 Teramo, Italy
| | - Daria Di Sabatino
- Istituto Zooprofilattico Sperimentale dell’Abruzzo e del Molise G. Caporale, 64100 Teramo, Italy
| | - Ileana Baldi
- Department of Cardiac Thoracic Vascular Sciences and Public Health, University of Padova, 35131 Padova, Italy
| | - Sandro Rolesu
- Osservatorio Epidemiologico Veterinario Regionale della Sardegna, Istituto Zooprofilattico Sperimentale della Sardegna, 07100 Sassari, Italy
| | - Vincenzo Gervasi
- Institute for Environmental Protection and Research (ISPRA), 00144 Roma, Italy
| | - Vittorio Guberti
- Institute for Environmental Protection and Research (ISPRA), 00144 Roma, Italy
| | - Stefano Cappai
- Osservatorio Epidemiologico Veterinario Regionale della Sardegna, Istituto Zooprofilattico Sperimentale della Sardegna, 07100 Sassari, Italy
| |
Collapse
|
10
|
Description of electroencephalographic data gathered using water-based medium-expansion foam as a depopulation method for nursery pigs. Sci Rep 2022; 12:16798. [PMID: 36207428 PMCID: PMC9546833 DOI: 10.1038/s41598-022-21353-7] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/19/2022] [Accepted: 09/26/2022] [Indexed: 11/08/2022] Open
Abstract
The United States' swine industry is under constant threat of foreign animal diseases, which may emerge without warning due to the globalized transportation networks moving people, animals, and products. Therefore, having disease control and elimination protocols in place prior to pathogen introduction is paramount for business continuity and economic recovery. During extraordinary circumstances, it may become necessary to depopulate large populations of animals, including swine, as a disease containment measure. Currently approved depopulation methods for swine present significant logistical challenges when scaled to large populations or performed in field conditions. In the United States, water-based foam is currently approved for poultry depopulation, and recent field studies demonstrate water-based foam is an effective depopulation alternative for swine. While effective, the speed at which water-based foam induces loss of consciousness prior to death, a major welfare consideration, has not been adequately investigated. In this study, 12 nursery pigs were terminated using water-based medium-expansion foam to quantify the time to induce loss of consciousness and ultimately brain death. Each pig was implanted with subdermal electrodes to capture electroencephalographic data, placed in a body sling, and suspended in a plastic bulk container that was subsequently filled with water-based foam. Electroencephalographic data was recorded for 15 min, during which the pigs remained immersed in the water-based foam. Conservatively, average (± SD) time to unconsciousness and brain death was 1 min, 53 s ± 36 s and 3 min, 3 s ± 56 s, respectively. The relatively rapid loss of consciousness compared to other methods limits the amount of distress and is overall a positive finding for the welfare of the pigs that might be depopulated with water-based foam. The findings of this study add additional evidence supporting the use of water-based medium-expansion foam for an emergency depopulation of swine.
Collapse
|
11
|
Nielsen SS, Alvarez J, Bicout DJ, Calistri P, Canali E, Drewe JA, Garin-Bastuji B, Gonzales Rojas JL, Schmidt CG, Michel V, Miranda Chueca MÁ, Padalino B, Pasquali P, Roberts HC, Spoolder H, Stahl K, Velarde A, Viltrop A, Winckler C, Earley B, Edwards S, Faucitano L, Marti S, de La Lama GCM, Costa LN, Thomsen PT, Ashe S, Mur L, Van der Stede Y, Herskin M. Welfare of pigs during transport. EFSA J 2022; 20:e07445. [PMID: 36092763 PMCID: PMC9449989 DOI: 10.2903/j.efsa.2022.7445] [Citation(s) in RCA: 7] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/23/2023] Open
Abstract
In the framework of its Farm to Fork Strategy, the Commission is undertaking a comprehensive evaluation of the animal welfare legislation. The present Opinion deals with protection of pigs during transport. The welfare of pigs during transport by road is the main focus, but other means of transport are also covered. Current practices related to transport of pigs during the different stages (preparation, loading/unloading, transit and journey breaks) are described. Overall, 10 welfare consequences were identified as highly relevant for the welfare of pigs during transport based on the severity, duration and frequency of occurrence: group stress, handling stress, heat stress, injuries, motion stress, prolonged hunger, prolonged thirst, restriction of movement, resting problems and sensory overstimulation. These welfare consequences and their animal‐based measures are described. A variety of hazards were identified, mainly relating to factors such as mixing of unfamiliar pigs, inappropriate handling methods and devices, the use of pick‐up pens, inexperienced/untrained handlers, structural deficiencies of vehicles and facilities, poor driving conditions, unfavourable microclimatic and environmental conditions and poor husbandry practices leading to these welfare consequences. The Opinion contains general and specific conclusions relating to the different stages of transport of pigs. Recommendations to prevent hazards and to correct or mitigate welfare consequences are made. Recommendations were also developed to define quantitative thresholds for microclimatic conditions and minimum space allowance within means of transport. The development of the welfare consequences over time was assessed in relation to maximum journey duration. The Opinion covers specific animal transport scenarios identified by the European Commission relating to transport of cull sows and ‘special health status animals’, and lists welfare concerns associated with these.
Collapse
|
12
|
O'Hara KC, Beltrán-Alcrudo D, Hovari M, Tabakovski B, Martínez-López B. Network analysis of live pig movements in North Macedonia: Pathways for disease spread. Front Vet Sci 2022; 9:922412. [PMID: 36016804 PMCID: PMC9396142 DOI: 10.3389/fvets.2022.922412] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/17/2022] [Accepted: 07/19/2022] [Indexed: 11/27/2022] Open
Abstract
Globalization of trade, and the interconnectivity of animal production systems, continues to challenge efforts to control disease. A better understanding of trade networks supports development of more effective strategies for mitigation for transboundary diseases like African swine fever (ASF), classical swine fever (CSF), and foot-and-mouth disease (FMD). North Macedonia, bordered to the north and east by countries with ongoing ASF outbreaks, recently reported its first incursion of ASF. This study aimed to describe the distribution of pigs and pig farms in North Macedonia, and to characterize the live pig movement network. Network analyses on movement data from 2017 to 2019 were performed for each year separately, and consistently described weakly connected components with a few primary hubs that most nodes shipped to. In 2019, the network demonstrated a marked decrease in betweenness and increase in communities. Most shipments occurred within 50 km, with movements <6 km being the most common (22.5%). Nodes with the highest indegree and outdegree were consistent across years, despite a large turnover among smallholder farms. Movements to slaughterhouses predominated (85.6%), with movements between farms (5.4%) and movements to market (5.8%) playing a lesser role. This description of North Macedonia's live pig movement network should enable implementation of more efficient and cost-effective mitigation efforts strategies in country, and inform targeted educational outreach, and provide data for future disease modeling, in the region.
Collapse
Affiliation(s)
- Kathleen C. O'Hara
- Center for Animal Disease Modeling and Surveillance (CADMS), School of Veterinary Medicine, University of California, Davis, Davis, CA, United States
| | - Daniel Beltrán-Alcrudo
- Food and Agriculture Organization of the United Nations (FAO), Regional Office for Europe and Central Asia, Budapest, Hungary
| | - Mark Hovari
- Food and Agriculture Organization of the United Nations (FAO), Regional Office for Europe and Central Asia, Budapest, Hungary
| | - Blagojcho Tabakovski
- Food and Veterinary Agency, Republic of North Macedonia, Skopje, North Macedonia
| | - Beatriz Martínez-López
- Center for Animal Disease Modeling and Surveillance (CADMS), School of Veterinary Medicine, University of California, Davis, Davis, CA, United States
- *Correspondence: Beatriz Martínez-López
| |
Collapse
|
13
|
Saegerman C, Evrard J, Houtain JY, Alzieu JP, Bianchini J, Mpouam SE, Schares G, Liénard E, Jacquiet P, Villa L, Álvarez-García G, Gazzonis AL, Gentile A, Delooz L. First Expert Elicitation of Knowledge on Drivers of Emergence of Bovine Besnoitiosis in Europe. Pathogens 2022; 11:pathogens11070753. [PMID: 35889998 PMCID: PMC9323894 DOI: 10.3390/pathogens11070753] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/20/2022] [Revised: 06/24/2022] [Accepted: 06/28/2022] [Indexed: 11/16/2022] Open
Abstract
Bovine besnoitiosis (BB) is a chronic and debilitating parasitic disease in cattle caused by the protozoan parasite Besnoitia besnoiti. South European countries are affected and have reported clinical cases of BB. However, BB is considered as emerging in other countries/regions of central, eastern and northern Europe. Yet, data on drivers of emergence of BB in Europe are scarce. In this study, fifty possible drivers of emergence of BB in cattle were identified. A scoring system was developed per driver. Then, the scoring was elicited from eleven recognized European experts to: (i) allocate a score to each driver, (ii) weight the score of drivers within each domain and (iii) weight the different domains among themselves. An overall weighted score was calculated per driver, and drivers were ranked in decreasing order of importance. Regression tree analysis was used to group drivers with comparable likelihoods to play a role in the emergence of BB in cattle in Europe. Finally, robustness testing of expert elicitation was performed for the seven drivers having the highest probability to play a key role in the emergence of BB: i.e., (i) legal/illegal movements of live animals from neighbouring/European Union member states or (ii) from third countries, (iii) risk of showing no clinical sign and silent spread during infection and post infection, (iv) as a consequence, difficulty to detect the emergence, (v) existence of vectors and their potential spread, (vi) European geographical proximity of the pathogen/disease to the country, and (vii) animal density of farms. Provided the limited scientific knowledge on the topic, expert elicitation of knowledge, multi-criteria decision analysis, cluster and sensitivity analyses are very important to prioritize future studies, e.g., the need for quantitative import risk assessment and estimation of the burden of BB to evidence and influence policymaking towards changing (or not) its status as a reportable disease, with prevention and control activities targeting, firstly, the top seven drivers. The present methodology could be applied to other emerging animal diseases.
Collapse
Affiliation(s)
- Claude Saegerman
- Research Unit of Epidemiology and Risk Analysis Applied to Veterinary Science (UREAR-ULiège), Fundamental and Applied Research for Animals & Health (FARAH) Center, Faculty of Veterinary Medicine, University of Liege, 4000 Liege, Belgium; (J.B.); (L.D.)
- Correspondence:
| | - Julien Evrard
- Regional Association for Animal Registration and Health (ARSIA) asbl, 5590 Ciney, Belgium; (J.E.); (J.-Y.H.)
| | - Jean-Yves Houtain
- Regional Association for Animal Registration and Health (ARSIA) asbl, 5590 Ciney, Belgium; (J.E.); (J.-Y.H.)
| | - Jean-Pierre Alzieu
- Laboratoire Vétérinaire Départemental de l’Ariège (LVD09), 09008 Foix, Ariège, France;
| | - Juana Bianchini
- Research Unit of Epidemiology and Risk Analysis Applied to Veterinary Science (UREAR-ULiège), Fundamental and Applied Research for Animals & Health (FARAH) Center, Faculty of Veterinary Medicine, University of Liege, 4000 Liege, Belgium; (J.B.); (L.D.)
| | - Serge Eugène Mpouam
- School of Veterinary Medicine and Science, University of Ngaoundere, Ngaoundere P.O. Box 454, Cameroon;
| | - Gereon Schares
- Friedrich-Loeffler-Institut, Bundesforschungsinstitut für Tiergesundheit, Federal Research Institute for Animal Health, 17493 Greifswald, Insel Riems, Germany;
| | - Emmanuel Liénard
- UMR INTHERES/DGER, Ecole Nationale Vétérinaire de Toulouse, CEDEX 03, 31076 Toulouse, France;
| | - Philippe Jacquiet
- UMR INRA/DGER IHAP 1225, Ecole Nationale Vétérinaire de Toulouse, CEDEX 03, 31076 Toulouse, France;
| | - Luca Villa
- Department of Veterinary Medicine and Animal Sciences, Università degli Studi di Milano, Via dell’Università 6, 26900 Lodi, Italy; (L.V.); (A.L.G.)
| | - Gema Álvarez-García
- SALUVET Group, Animal Health Department, Faculty of Veterinary Sciences, Complutense University of Madrid, Ciudad Universitaria s/n, 28040 Madrid, Spain;
| | - Alessia Libera Gazzonis
- Department of Veterinary Medicine and Animal Sciences, Università degli Studi di Milano, Via dell’Università 6, 26900 Lodi, Italy; (L.V.); (A.L.G.)
| | - Arcangelo Gentile
- Department of Veterinary Medical Sciences, University of Bologna, 40064 Ozzano Emilia, BO, Italy;
| | - Laurent Delooz
- Research Unit of Epidemiology and Risk Analysis Applied to Veterinary Science (UREAR-ULiège), Fundamental and Applied Research for Animals & Health (FARAH) Center, Faculty of Veterinary Medicine, University of Liege, 4000 Liege, Belgium; (J.B.); (L.D.)
- Regional Association for Animal Registration and Health (ARSIA) asbl, 5590 Ciney, Belgium; (J.E.); (J.-Y.H.)
| |
Collapse
|
14
|
Yue W, Li Y, Zhang X, He J, Ma H. Prevalence of Porcine Circoviruses in Slaughterhouses in Central Shanxi Province, China. Front Vet Sci 2022; 9:820914. [PMID: 35677933 PMCID: PMC9169519 DOI: 10.3389/fvets.2022.820914] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/23/2021] [Accepted: 04/01/2022] [Indexed: 11/13/2022] Open
Abstract
BackgroundPorcine circovirus disease is currently the greatest threat to pig farming. Four main porcine circovirus genotypes are circulating worldwide.ObjectiveThe study aimed to assess the prevalence of porcine circovirus genotypes in the central part of Shanxi province.MethodsWe investigated the prevalence of porcine circovirus type 2 (PCV2), porcine circovirus type 3 (PCV3), and porcine circovirus type 4 (PCV4). Porcine circoviruses were analyzed by polymerase chain reaction (PCR) in the lung tissues of 180 pigs from 7 slaughterhouses in central Shanxi, China.ResultsThe prevalence of PCV2, PCV3, and PCV4 were 56.8, 80, and 9.4%, respectively, and the negative rate was 10% for all three pathogens. The co-infection with PCV2 + PCV3, PCV2 + PCV4, PCV3 + PCV4, and PCV2 + PCV3 + PCV4 were 47.2, 7.4, 7.4, and 5.6%, respectively. Among PCV4-positive samples, the positive rate of PCV4 + PCV2 was 52.9% (9/17), whereas that of PCV4 + PCV3 was 100% (17/17). On the other hand, PCV2 and PCV3 were detected in 57.1% (93/163) and in 78.5% (128/163) of PCV4-negative samples, respectively. Phylogenetic analysis demonstrated that PCV2, PCV3, and PCV4 were not in the same clade and were distant from each other.ConclusionThe high positive rates of PCV3, PCV2 + PCV3, and PCV3 + PCV4 suggest that PCV3 may play a decisive role in PCV2 and PCV4 infections. Therefore, further control of PCV3 is needed to reduce the spread of the virus.
Collapse
|
15
|
Acosta A, Cardenas NC, Imbacuan C, Lentz HH, Dietze K, Amaku M, Burbano A, Gonçalves VS, Ferreira F. Modelling control strategies against Classical Swine Fever: influence of traders and markets using static and temporal networks in Ecuador. Prev Vet Med 2022; 205:105683. [DOI: 10.1016/j.prevetmed.2022.105683] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/14/2021] [Revised: 05/17/2022] [Accepted: 05/24/2022] [Indexed: 11/25/2022]
|
16
|
de la Torre A, Bosch J, Sánchez-Vizcaíno JM, Ito S, Muñoz C, Iglesias I, Martínez-Avilés M. African Swine Fever Survey in a European Context. Pathogens 2022; 11:pathogens11020137. [PMID: 35215081 PMCID: PMC8878522 DOI: 10.3390/pathogens11020137] [Citation(s) in RCA: 10] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/09/2021] [Revised: 01/19/2022] [Accepted: 01/21/2022] [Indexed: 12/28/2022] Open
Abstract
African swine fever (ASF) is currently the most threatening disease for domestic and wild pigs worldwide. Wild boar has been the main affected species in all EU countries except for Romania, where most notifications occur in domestic pigs. The spread of ASF in wild boar is challenging to control; risk factors are harder to identify and establish than in domestic pigs, which, together with an underestimation of the disease and the lack of treatment or an effective vaccine, are hindering control and eradication efforts. We distributed two online questionnaires, one for domestic pigs and one for wild boar, to experts of different background and countries in Europe, to explore risk factors in relation to ASF control connected to farming, hunting, trade, the environment, and domestic pig and wild boar populations. Overall, wild boar movements were estimated to pose the highest risk of ASF introduction and spread. The movement of pork and pork products for own consumption also ranked high. Here we explored, in addition to the assessment of risk pathways, the identification of risks of transmission at the domestic/wild boar interface, the importance of biosecurity practices and improved control efforts, and controversial opinions that require further attention.
Collapse
Affiliation(s)
- Ana de la Torre
- Infectious Diseases and Global Health Department, Centro de Investigación en Sanidad Animal (CISA), Instituto Nacional de Investigación y Tecnología Agraria y Alimentaria-Consejo Superior de Investigaciones Científicas (INIA-CSIC), 28130 Madrid, Spain; (A.d.l.T.); (I.I.)
| | - Jaime Bosch
- Animal Health Department, Centro de Vigilancia Sanitaria Veterinaria (VISAVET), Complutense University of Madrid, 28040 Madrid, Spain; (J.B.); (J.M.S.-V.); (S.I.); (C.M.)
| | - José Manuel Sánchez-Vizcaíno
- Animal Health Department, Centro de Vigilancia Sanitaria Veterinaria (VISAVET), Complutense University of Madrid, 28040 Madrid, Spain; (J.B.); (J.M.S.-V.); (S.I.); (C.M.)
| | - Satoshi Ito
- Animal Health Department, Centro de Vigilancia Sanitaria Veterinaria (VISAVET), Complutense University of Madrid, 28040 Madrid, Spain; (J.B.); (J.M.S.-V.); (S.I.); (C.M.)
| | - Carolina Muñoz
- Animal Health Department, Centro de Vigilancia Sanitaria Veterinaria (VISAVET), Complutense University of Madrid, 28040 Madrid, Spain; (J.B.); (J.M.S.-V.); (S.I.); (C.M.)
| | - Irene Iglesias
- Infectious Diseases and Global Health Department, Centro de Investigación en Sanidad Animal (CISA), Instituto Nacional de Investigación y Tecnología Agraria y Alimentaria-Consejo Superior de Investigaciones Científicas (INIA-CSIC), 28130 Madrid, Spain; (A.d.l.T.); (I.I.)
| | - Marta Martínez-Avilés
- Infectious Diseases and Global Health Department, Centro de Investigación en Sanidad Animal (CISA), Instituto Nacional de Investigación y Tecnología Agraria y Alimentaria-Consejo Superior de Investigaciones Científicas (INIA-CSIC), 28130 Madrid, Spain; (A.d.l.T.); (I.I.)
- Correspondence:
| |
Collapse
|
17
|
Meek S, Watson T, Eory L, McFarlane G, Wynne FJ, McCleary S, Dunn LEM, Charlton EM, Craig C, Shih B, Regan T, Taylor R, Sutherland L, Gossner A, Chintoan-Uta C, Fletcher S, Beard PM, Hassan MA, Grey F, Hope JC, Stevens MP, Nowak-Imialek M, Niemann H, Ross PJ, Tait-Burkard C, Brown SM, Lefevre L, Thomson G, McColl BW, Lawrence AB, Archibald AL, Steinbach F, Crooke HR, Gao X, Liu P, Burdon T. Stem cell-derived porcine macrophages as a new platform for studying host-pathogen interactions. BMC Biol 2022; 20:14. [PMID: 35027054 PMCID: PMC8759257 DOI: 10.1186/s12915-021-01217-8] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/28/2021] [Accepted: 12/16/2021] [Indexed: 11/16/2022] Open
Abstract
BACKGROUND Infectious diseases of farmed and wild animals pose a recurrent threat to food security and human health. The macrophage, a key component of the innate immune system, is the first line of defence against many infectious agents and plays a major role in shaping the adaptive immune response. However, this phagocyte is a target and host for many pathogens. Understanding the molecular basis of interactions between macrophages and pathogens is therefore crucial for the development of effective strategies to combat important infectious diseases. RESULTS We explored how porcine pluripotent stem cells (PSCs) can provide a limitless in vitro supply of genetically and experimentally tractable macrophages. Porcine PSC-derived macrophages (PSCdMs) exhibited molecular and functional characteristics of ex vivo primary macrophages and were productively infected by pig pathogens, including porcine reproductive and respiratory syndrome virus (PRRSV) and African swine fever virus (ASFV), two of the most economically important and devastating viruses in pig farming. Moreover, porcine PSCdMs were readily amenable to genetic modification by CRISPR/Cas9 gene editing applied either in parental stem cells or directly in the macrophages by lentiviral vector transduction. CONCLUSIONS We show that porcine PSCdMs exhibit key macrophage characteristics, including infection by a range of commercially relevant pig pathogens. In addition, genetic engineering of PSCs and PSCdMs affords new opportunities for functional analysis of macrophage biology in an important livestock species. PSCs and differentiated derivatives should therefore represent a useful and ethical experimental platform to investigate the genetic and molecular basis of host-pathogen interactions in pigs, and also have wider applications in livestock.
Collapse
Affiliation(s)
- Stephen Meek
- The Roslin Institute and Royal (Dick) School of Veterinary Studies, University of Edinburgh, Midlothian, EH25 9RG, UK.
| | - Tom Watson
- The Roslin Institute and Royal (Dick) School of Veterinary Studies, University of Edinburgh, Midlothian, EH25 9RG, UK
| | - Lel Eory
- The Roslin Institute and Royal (Dick) School of Veterinary Studies, University of Edinburgh, Midlothian, EH25 9RG, UK
| | - Gus McFarlane
- The Roslin Institute and Royal (Dick) School of Veterinary Studies, University of Edinburgh, Midlothian, EH25 9RG, UK
| | - Felicity J Wynne
- Virology Department, Animal and Plant Health Agency, Addlestone, KT15 3NB, UK
| | - Stephen McCleary
- Virology Department, Animal and Plant Health Agency, Addlestone, KT15 3NB, UK
| | | | - Emily M Charlton
- The Roslin Institute and Royal (Dick) School of Veterinary Studies, University of Edinburgh, Midlothian, EH25 9RG, UK
| | - Chloe Craig
- The Roslin Institute and Royal (Dick) School of Veterinary Studies, University of Edinburgh, Midlothian, EH25 9RG, UK
| | - Barbara Shih
- The Roslin Institute and Royal (Dick) School of Veterinary Studies, University of Edinburgh, Midlothian, EH25 9RG, UK
| | - Tim Regan
- The Roslin Institute and Royal (Dick) School of Veterinary Studies, University of Edinburgh, Midlothian, EH25 9RG, UK
| | - Ryan Taylor
- The Roslin Institute and Royal (Dick) School of Veterinary Studies, University of Edinburgh, Midlothian, EH25 9RG, UK
| | - Linda Sutherland
- The Roslin Institute and Royal (Dick) School of Veterinary Studies, University of Edinburgh, Midlothian, EH25 9RG, UK
| | - Anton Gossner
- The Roslin Institute and Royal (Dick) School of Veterinary Studies, University of Edinburgh, Midlothian, EH25 9RG, UK
| | - Cosmin Chintoan-Uta
- The Roslin Institute and Royal (Dick) School of Veterinary Studies, University of Edinburgh, Midlothian, EH25 9RG, UK
| | - Sarah Fletcher
- The Roslin Institute and Royal (Dick) School of Veterinary Studies, University of Edinburgh, Midlothian, EH25 9RG, UK
| | - Philippa M Beard
- The Roslin Institute and Royal (Dick) School of Veterinary Studies, University of Edinburgh, Midlothian, EH25 9RG, UK
- The Pirbright Institute, Pirbright, Surrey, UK
| | - Musa A Hassan
- The Roslin Institute and Royal (Dick) School of Veterinary Studies, University of Edinburgh, Midlothian, EH25 9RG, UK
| | - Finn Grey
- The Roslin Institute and Royal (Dick) School of Veterinary Studies, University of Edinburgh, Midlothian, EH25 9RG, UK
| | - Jayne C Hope
- The Roslin Institute and Royal (Dick) School of Veterinary Studies, University of Edinburgh, Midlothian, EH25 9RG, UK
| | - Mark P Stevens
- The Roslin Institute and Royal (Dick) School of Veterinary Studies, University of Edinburgh, Midlothian, EH25 9RG, UK
| | - Monika Nowak-Imialek
- First Department of Medicine, Cardiology, Klinikum rechts der Isar - Technical University of Munich, Ismaninger Straße 22, 81675, Munich, Germany
| | - Heiner Niemann
- Gastroenterology, Hepatology and Endocrinology Department, Hannover Medical School, Carl Neuberg Str 1, 30625, Hannover, Germany
| | - Pablo J Ross
- Department of Animal Science, University of California, 450 Bioletti Way, Davis, CA, 95616, USA
| | - Christine Tait-Burkard
- The Roslin Institute and Royal (Dick) School of Veterinary Studies, University of Edinburgh, Midlothian, EH25 9RG, UK
| | - Sarah M Brown
- The Roslin Institute and Royal (Dick) School of Veterinary Studies, University of Edinburgh, Midlothian, EH25 9RG, UK
| | - Lucas Lefevre
- UK Dementia Research Institute, The University of Edinburgh, Edinburgh Medical School, The Chancellor's Building, 49 Little France Crescent, Edinburgh, EH16 4SB, UK
| | - Gerard Thomson
- Centre for Clinical Brain Sciences, University of Edinburgh, Department of Clinical Neurosciences, NHS Lothian, Edinburgh, UK
| | - Barry W McColl
- UK Dementia Research Institute, The University of Edinburgh, Edinburgh Medical School, The Chancellor's Building, 49 Little France Crescent, Edinburgh, EH16 4SB, UK
- Centre for Discovery Brain Sciences, Chancellor's Building, 49 Little France Crescent, Edinburgh, EH16 4SB, UK
| | - Alistair B Lawrence
- The Roslin Institute and Royal (Dick) School of Veterinary Studies, University of Edinburgh, Midlothian, EH25 9RG, UK
- Scotland's Rural College (SRUC), West Mains Road, Edinburgh, EH9 3RG, UK
| | - Alan L Archibald
- The Roslin Institute and Royal (Dick) School of Veterinary Studies, University of Edinburgh, Midlothian, EH25 9RG, UK
| | - Falko Steinbach
- Virology Department, Animal and Plant Health Agency, Addlestone, KT15 3NB, UK
| | - Helen R Crooke
- Virology Department, Animal and Plant Health Agency, Addlestone, KT15 3NB, UK
| | - Xuefei Gao
- Department of Physiology, School of Basic Medical Sciences, Southern Medical University, Guangzhou, 510515, China
| | - Pentao Liu
- The Wellcome Sanger Institute, Wellcome Genome Campus, Hinxton, Cambridge, UK
- School of Biomedical Sciences, Li Ka Shing Faculty of Medicine, Stem Cell and Regenerative Medicine, The University of Hong Kong, Hong Kong, China
- Centre for Translational Stem Cell Biology, Science Park, Hong Kong, China
| | - Tom Burdon
- The Roslin Institute and Royal (Dick) School of Veterinary Studies, University of Edinburgh, Midlothian, EH25 9RG, UK.
| |
Collapse
|
18
|
Models to assess the risk of introduction of selected animal viral diseases through the importation of live animals as a key part of risk analysis. J Vet Res 2021; 65:383-389. [PMID: 35111990 PMCID: PMC8775722 DOI: 10.2478/jvetres-2021-0069] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/16/2021] [Accepted: 12/07/2021] [Indexed: 12/02/2022] Open
Abstract
Introduction of an animal viral disease, especially a notifiable disease, into an importing country or region free from the disease may lead to serious epidemiological consequences and economic losses. Trade in live animals is historically considered one of the most important risk pathways. To estimate the magnitude of such risk, the likelihood of a virus’ entry into a country and the consequences of this event should be jointly evaluated. Depending on data availability, the urgency of the problem and the detail level of the objectives, a risk assessment may be conducted in a qualitative, semi-quantitative or quantitative way. The purpose of this review was firstly to provide a brief description of each step of the risk analysis process, with particular emphasis on the risk assessment component, and subsequently to supply examples of different approaches to the assessment of the risk of the introduction of selected animal viral diseases. Based on the reviewed models, the overall likelihood of introduction of particular diseases was generally estimated as low. The output risk value was strongly dependent on the duration of the silent phase of the epidemic in the country of origin. Other parameters with some bearing upon the risk derived from the epidemiological situation in the country of origin and the biosecurity or mitigation measures implemented in the country of destination. The investigated models are universal tools for conducting assessment of the risk of introduction of various animal diseases to any country. Their application may lead to timely implementation of appropriate measures for the prevention of the spread of a disease to another country or region.
Collapse
|
19
|
Arenas-Gamboa AM, Simmons HL, Krecek RC, Logan LL, Ellis D, Ptaschinski M, Cargill JS, Werre SR, Mulumba M, Heath L. AgSecure Africa Programme TM: A Blended Training Approach for Africa. JOURNAL OF VETERINARY MEDICAL EDUCATION 2021; 48:710-719. [PMID: 33493094 DOI: 10.3138/jvme-2020-0047] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/12/2023]
Abstract
An innovative training program entitled "AgSecure Africa ProgrammeTM" was developed in partnership with the South African Agricultural Research Council-Onderstepoort Veterinary Research (ARC-OVR) to train veterinarians, animal health technicians, researchers and laboratory personnel. Three blended courses consisting of both virtual and in-person delivery were provided with the intent of contributing to the better prevention, detection and control of infectious diseases of livestock and poultry of significant importance for the region with a strong emphasis on transboundary animal diseases. A "train the trainer" model of instruction was employed to equip participants with the ability to train and share knowledge with colleagues and small-holder farmers in their various communities and regions. The design of this program was to increase the capacity of veterinarians and veterinary diagnosticians to safely and accurately diagnose infectious livestock diseases and to also empower small-holder farmers with the knowledge needed to safely and securely manage their livestock and be a first line defense in the prevention and control of infectious livestock diseases. Quantitative and qualitative evaluations were used to measure the impact of the trainings which revealed significant increases in knowledge gains. Course materials were submitted and approved for accreditation by the South African Veterinary Council (SAVC) becoming the first international training program to achieve this. Approval of these courses led to licensed veterinarians and animal health technicians being awarded continuing professional development credits upon their successful completion of courses. A larger goal was to build training capacity, not only for South Africa, but also for the region.
Collapse
|
20
|
Njau EP, Machuka EM, Cleaveland S, Shirima GM, Kusiluka LJ, Okoth EA, Pelle R. African Swine Fever Virus (ASFV): Biology, Genomics and Genotypes Circulating in Sub-Saharan Africa. Viruses 2021; 13:2285. [PMID: 34835091 PMCID: PMC8623397 DOI: 10.3390/v13112285] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/31/2021] [Revised: 10/17/2021] [Accepted: 11/03/2021] [Indexed: 12/22/2022] Open
Abstract
African swine fever (ASF) is a highly infectious and fatal haemorrhagic disease of pigs that is caused by a complex DNA virus of the genus Asfivirus and Asfarviridae African suids family. The disease is among the most devastating pig diseases worldwide including Africa. Although the disease was first reported in the 19th century, it has continued to spread in Africa and other parts of the world. Globally, the rising demand for pork and concomitant increase in transboundary movements of pigs and pork products is likely to increase the risk of transmission and spread of ASF and pose a major challenge to the pig industry. Different genotypes of the ASF virus (ASFV) with varying virulence have been associated with different outbreaks in several countries in sub-Saharan Africa (SSA) and worldwide, and understanding genotype circulation will be important for ASF prevention and control strategies. ASFV genotypes unique to Africa have also been reported in SSA. This review briefly recounts the biology, genomics and genotyping of ASFV and provides an account of the different genotypes circulating in SSA. The review also highlights prevention, control and progress on vaccine development and identifies gaps in knowledge of ASFV genotype circulation in SSA that need to be addressed.
Collapse
Affiliation(s)
- Emma P. Njau
- Biosciences Eastern and Central Africa—International Livestock Research Institute Hub, P.O. Box 30709, Nairobi 00100, Kenya; (E.M.M.); (E.A.O.); (R.P.)
- Nelson Mandela African Institution of Science and Technology, Arusha P.O. Box 447, Tanzania; (S.C.); (G.M.S.); (L.J.K.)
- College of Veterinary Medicine and Biomedical Sciences, Sokoine University of Agriculture, Chuo Kikuu, Morogoro P.O. Box 3015, Tanzania
| | - Eunice M. Machuka
- Biosciences Eastern and Central Africa—International Livestock Research Institute Hub, P.O. Box 30709, Nairobi 00100, Kenya; (E.M.M.); (E.A.O.); (R.P.)
| | - Sarah Cleaveland
- Nelson Mandela African Institution of Science and Technology, Arusha P.O. Box 447, Tanzania; (S.C.); (G.M.S.); (L.J.K.)
- Institute of Biodiversity, Animal Health and Comparative Medicine, College of Medical, Veterinary and Life Sciences, University of Glasgow, Glasgow G12 8QQ, UK
| | - Gabriel M. Shirima
- Nelson Mandela African Institution of Science and Technology, Arusha P.O. Box 447, Tanzania; (S.C.); (G.M.S.); (L.J.K.)
| | - Lughano J. Kusiluka
- Nelson Mandela African Institution of Science and Technology, Arusha P.O. Box 447, Tanzania; (S.C.); (G.M.S.); (L.J.K.)
- College of Veterinary Medicine and Biomedical Sciences, Sokoine University of Agriculture, Chuo Kikuu, Morogoro P.O. Box 3015, Tanzania
- Mzumbe University, Morogoro P.O. Box 1, Tanzania
| | - Edward A. Okoth
- Biosciences Eastern and Central Africa—International Livestock Research Institute Hub, P.O. Box 30709, Nairobi 00100, Kenya; (E.M.M.); (E.A.O.); (R.P.)
| | - Roger Pelle
- Biosciences Eastern and Central Africa—International Livestock Research Institute Hub, P.O. Box 30709, Nairobi 00100, Kenya; (E.M.M.); (E.A.O.); (R.P.)
| |
Collapse
|
21
|
Kessler S, Harder TC, Schwemmle M, Ciminski K. Influenza A Viruses and Zoonotic Events-Are We Creating Our Own Reservoirs? Viruses 2021; 13:v13112250. [PMID: 34835056 PMCID: PMC8624301 DOI: 10.3390/v13112250] [Citation(s) in RCA: 17] [Impact Index Per Article: 5.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/07/2021] [Revised: 11/04/2021] [Accepted: 11/06/2021] [Indexed: 01/16/2023] Open
Abstract
Zoonotic infections of humans with influenza A viruses (IAVs) from animal reservoirs can result in severe disease in individuals and, in rare cases, lead to pandemic outbreaks; this is exemplified by numerous cases of human infection with avian IAVs (AIVs) and the 2009 swine influenza pandemic. In fact, zoonotic transmissions are strongly facilitated by manmade reservoirs that were created through the intensification and industrialization of livestock farming. This can be witnessed by the repeated introduction of IAVs from natural reservoirs of aquatic wild bird metapopulations into swine and poultry, and the accompanied emergence of partially- or fully-adapted human pathogenic viruses. On the other side, human adapted IAV have been (and still are) introduced into livestock by reverse zoonotic transmission. This link to manmade reservoirs was also observed before the 20th century, when horses seemed to have been an important reservoir for IAVs but lost relevance when the populations declined due to increasing industrialization. Therefore, to reduce zoonotic events, it is important to control the spread of IAV within these animal reservoirs, for example with efficient vaccination strategies, but also to critically surveil the different manmade reservoirs to evaluate the emergence of new IAV strains with pandemic potential.
Collapse
Affiliation(s)
- Susanne Kessler
- Medical Center, Institute of Virology, University of Freiburg, 79104 Freiburg, Germany; (S.K.); (M.S.)
- Faculty of Medicine, University of Freiburg, 79104 Freiburg, Germany
| | - Timm C. Harder
- Friedrich-Loeffler-Institut (FLI), Institute of Diagnostic Virology, 17493 Greifswald-Insel Riems, Germany;
| | - Martin Schwemmle
- Medical Center, Institute of Virology, University of Freiburg, 79104 Freiburg, Germany; (S.K.); (M.S.)
- Faculty of Medicine, University of Freiburg, 79104 Freiburg, Germany
| | - Kevin Ciminski
- Medical Center, Institute of Virology, University of Freiburg, 79104 Freiburg, Germany; (S.K.); (M.S.)
- Faculty of Medicine, University of Freiburg, 79104 Freiburg, Germany
- Correspondence:
| |
Collapse
|
22
|
PINGZHEN W, WENYONG W, SHIHAI Y. Research on consumers' perception of food risk based on LSTM sentiment classification. FOOD SCIENCE AND TECHNOLOGY 2021. [DOI: 10.1590/fst.47221] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
Affiliation(s)
- Wu PINGZHEN
- Panyapiwat Institute of Management, Thailand
| | | | | |
Collapse
|
23
|
Schambow RA, Sampedro F, Urriola PE, van de Ligt JLG, Perez A, Shurson GC. Rethinking the uncertainty of African swine fever virus contamination in feed ingredients and risk of introduction into the United States. Transbound Emerg Dis 2021; 69:157-175. [PMID: 34689419 DOI: 10.1111/tbed.14358] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/18/2021] [Revised: 09/27/2021] [Accepted: 10/03/2021] [Indexed: 01/02/2023]
Abstract
Economically relevant pathogens, such as African swine fever virus (ASFV), have been shown to survive when experimentally inoculated in some feed ingredients under the environmental conditions in transoceanic transport models. However, these models did not characterize the likelihood of virus survival under various time and temperature processes that feed ingredients undergo before they are added to swine diets. Here, we developed a quantitative risk assessment model to estimate the probability that one or more corn or soybean meal ocean vessels (25,000 tonnes) contaminated with ASFV would be imported into the United States annually. This final probability estimate was conditionally based on five likelihoods: the probability of initial ASFV contamination (p0), ASFV inactivation during processing (p1) and transport (p2), recontamination (pR), and ASFV inactivation while awaiting customs clearance at United States entry (p3). The probability of ASFV inactivation was modelled using corn and soybean (extruded or solvent extracted) processing conditions (times and temperatures), D-values (time to reduce 90% or 1-log) estimated from studies of ASFV thermal inactivation in pork serum (p1), and survival in feed ingredients during transoceanic transport (p2 and p3). 'What-if' scenarios using deterministic values for p0 and pR (1%, 10%, 25%, 50%, 75%, and 100%) were used to explore their impact on risk. The model estimated complete inactivation of ASFV after extrusion or solvent extraction processes regardless of the initial ASFV contamination probability assumed. The value of recontamination (ranging from 1% to 75%) was highly influential on the risk of one ASFV-contaminated soybean meal vessel entering the United States. Median risk estimates ranged from 0.064% [0.006%-0.60%; 95% probability interval (PI)], assuming a pR of 1.0%, up to 4.67% (0.45%-36.50% 95% PI) assuming a pR of 75.0%. This means that at least one vessel with ASFV-contaminated soybean meal would be imported once every 1563-21 years, respectively. When all raw corn was assumed to be contaminated (p0 = 100%), and no recontamination was assumed to occur (pR = 0%), the median probability of one vessel with ASFV-contaminated corn entering the United States was 2.02% (0.28%-9.43% 95% PI) or once every 50 years. Values of recontamination between 1% and 75% did not substantially change the risk of corn. Days of transport, virus survival during transport (D-value), and number of vessels shipped were the parameters most influential for increased likelihood of a vessel with ASFV-contaminated soybean meal or corn entering the United States. The model helped to identify knowledge gaps that are most influential on output values and serves as a framework that could be updated and parameterized as new scientific information becomes available. We propose that the quantitative risk assessment model developed in this study can be used as a framework for estimating the risk of ASFV entry into the United States and other ASFV-free countries through other types of imported feed ingredients that may potentially become contaminated. Ultimately, this model can be used to develop risk mitigation strategies and critical control points for inactivating ASFV during feed ingredient processing, storage, and transport, and contribute to the design and implementation of biosecurity measures to prevent the introduction of ASFV into the United States and other ASFV-free countries.
Collapse
Affiliation(s)
- Rachel A Schambow
- Center for Animal Health and Food Safety, College of Veterinary Medicine, University of Minnesota, St. Paul, Minnesota, USA.,Department of Veterinary Population Medicine, College of Veterinary Medicine, University of Minnesota, St. Paul, Minnesota, USA
| | - Fernando Sampedro
- Department of Veterinary Population Medicine, College of Veterinary Medicine, University of Minnesota, St. Paul, Minnesota, USA.,Environmental Health Sciences Division, School of Public Health, University of Minnesota, Minneapolis, Minnesota, USA
| | - Pedro E Urriola
- Department of Veterinary Population Medicine, College of Veterinary Medicine, University of Minnesota, St. Paul, Minnesota, USA.,Department of Animal Science, College of Agricultural and Natural Resource Sciences, University of Minnesota, St. Paul, Minnesota, USA
| | - Jennifer L G van de Ligt
- Department of Veterinary Population Medicine, College of Veterinary Medicine, University of Minnesota, St. Paul, Minnesota, USA
| | - Andres Perez
- Center for Animal Health and Food Safety, College of Veterinary Medicine, University of Minnesota, St. Paul, Minnesota, USA.,Department of Veterinary Population Medicine, College of Veterinary Medicine, University of Minnesota, St. Paul, Minnesota, USA
| | - Gerald C Shurson
- Department of Animal Science, College of Agricultural and Natural Resource Sciences, University of Minnesota, St. Paul, Minnesota, USA
| |
Collapse
|
24
|
Tran HNT, Le NCT, Pham BP, Luu VQ, Nguyen VL. Evaluation of an automated insulated isothermal polymerase chain reaction system for rapid and reliable, on-site detection of African swine fever virus. J Am Vet Med Assoc 2021; 259:662-668. [PMID: 34448618 DOI: 10.2460/javma.259.6.662] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/23/2022]
Abstract
OBJECTIVE To evaluate the utility of an automated insulated isothermal PCR (iiPCR) system for rapid and reliable on-site detection of African swine fever virus (ASFV) in swine biological samples. SAMPLE Lymph node, tissue homogenate, whole blood, serum, spleen, and tonsil samples collected from swine in North and South Vietnam. PROCEDURES Analytic sensitivity of the iiPCR system was determined by serial dilution and analysis of 2 samples (swine tissue homogenate and blood) predetermined to be positive for ASFV. Analytic specificity was assessed by analysis of 2 samples predetermined to be negative for ASFV and positive or negative for other swine pathogens (classical swine fever virus, porcine reproductive and respiratory syndrome virus, foot-and-mouth disease virus, and porcine circovirus type 2). Diagnostic performance of the iiPCR system for detection of ASFV was determined by analysis of the various tissue sample types. For all tests, a real-time PCR assay was used as the reference method. RESULTS The iiPCR system was able to detect ASFV in swine blood or tissue homogenate at dilutions up to 106, whereas the real-time PCR assay was able to detect dilutions of up to 105 or 106. The iiPCR system had high analytic specificity for detection of ASFV versus other swine pathogens. Between 97% and 100% agreement was found between results of the iiPCR system for the various tissue samples and results of real-time PCR assay. CONCLUSIONS AND CLINICAL RELEVANCE The evaluated iiPCR system was found to be a rapid, reliable, and sample-flexible method for ASFV detection and may be useful for disease surveillance and quarantine in national strategies for early ASF control.
Collapse
|
25
|
Hasahya E, Thakur KK, Dione MM, Wieland B, Oba P, Kungu J, Lee HS. Modeling the Spread of Porcine Reproductive and Respiratory Syndrome Among Pig Farms in Lira District of Northern Uganda. Front Vet Sci 2021; 8:727895. [PMID: 34527717 PMCID: PMC8435599 DOI: 10.3389/fvets.2021.727895] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/20/2021] [Accepted: 08/02/2021] [Indexed: 12/04/2022] Open
Abstract
Porcine Reproductive and Respiratory Syndrome (PRRS) is a viral swine disease that causes reproductive failure in breeding sows and respiratory distress in growing pigs. The main objectives were to simulate the transmission patterns of PRRS in Uganda using North American Animal Disease Spread Model (NAADSM) and to evaluate the potential effect of prevention and control options such as vaccination and movement control. The median number of infectious farms at the end of 52 weeks for the baseline scenario was 735 (36.75% of the 2,000 farms). The best effects of vaccination were observed in scenarios 60% farm coverage and 80% farm coverage, which resulted in 82 and 98.2% reduction in the median number of infectious farms at the end of the simulation, respectively. Vaccination of all medium and large farms only (33% of the farms) resulted in a 71.2% decrease in the median number of infectious farms at the end of 52 weeks. Movement control (MC) results showed that the median number of infectious farms at the end of 52 weeks decreased by 21.6, 52.3, 79.4, and 92.4% for scenarios MC 20, MC 40, MC 60, and MC 80%, respectively. This study provides new insights to the government of Uganda on how PRRS can be controlled. The large and medium farms need to be prioritized for vaccination, which would be a feasible and effective way to limit the spread of PRRS in Uganda. Scavenging pigs should be confined at all times, whether in the presence or absence of any disease outbreaks.
Collapse
Affiliation(s)
- Emmanuel Hasahya
- International Livestock Research Institute (ILRI), Kampala, Uganda
- College of Veterinary Medicine, Animal Resources and Biosecurity (COVAB), Makerere University, Kampala, Uganda
| | - Krishna K. Thakur
- Department of Health Management, Atlantic Veterinary College, University of Prince Edward Island, Charlottetown, PE, Canada
| | - Michel M. Dione
- International Livestock Research Institute (ILRI), Dakar, Senegal
| | - Barbara Wieland
- International Livestock Research Institute (ILRI), Addis Ababa, Ethiopia
| | - Peter Oba
- International Livestock Research Institute (ILRI), Kampala, Uganda
| | - Joseph Kungu
- College of Veterinary Medicine, Animal Resources and Biosecurity (COVAB), Makerere University, Kampala, Uganda
| | - Hu Suk Lee
- International Livestock Research Institute (ILRI), Hanoi, Vietnam
| |
Collapse
|
26
|
Calvin S, Snow A, Brockhoff E. African swine fever risk and plant-based feed ingredients: Canada's approach to risk management of imported feed products. Transbound Emerg Dis 2021; 69:176-181. [PMID: 34355864 PMCID: PMC9293021 DOI: 10.1111/tbed.14281] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/30/2021] [Revised: 07/09/2021] [Accepted: 07/26/2021] [Indexed: 11/28/2022]
Abstract
As a result of unprecedented spread of African swine fever (ASF) since 2018, Canada has taken additional steps to prevent introduction of the virus. While the role of plant‐based feed in the transmission of ASF is not completely understood, it was identified that no mitigation measures were in place to address this uncertain risk. A risk analysis process was conducted with collaboration between government and industry, including an assessment of the costs and benefits of various risk mitigation options. Using existing legislative tools, requirements must now be met before the importation of plant‐based feed ingredients of concern is permitted. Even with an uncertain risk, countries such as Canada that would suffer severe consequences should ASF be introduced, need to consider appropriate, risk‐based mitigation measures.
Collapse
Affiliation(s)
- Sharon Calvin
- Animal Health Risk Assessment and Intelligence Section, Canadian Food Inspection Agency, Ottawa, Canada
| | - Amy Snow
- Foreign Animal Disease Section, Canadian Food Inspection Agency, Ottawa, Canada
| | | |
Collapse
|
27
|
Neumann EJ, Hall WF, Dahl J, Hamilton D, Kurian A. Is transportation a risk factor for African swine fever transmission in Australia: a review. Aust Vet J 2021; 99:459-468. [PMID: 34235721 DOI: 10.1111/avj.13106] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/26/2020] [Revised: 06/08/2021] [Accepted: 06/21/2021] [Indexed: 11/27/2022]
Abstract
African swine fever (ASF) is a viral disease of the pigs that was first described in Africa during the early part of the twentieth century. The disease has periodically occurred outside of Africa, including an ongoing epidemic in Europe and Asia that started in 2007; the disease has never occurred in Australia or New Zealand. Once introduced into a country, spread can occur through direct and indirect routes of transmission. Infected feral pig populations have the potential to act as a long-term reservoir for the virus, making eradication difficult. Just before and throughout the period of clinical signs, ASF virus is shed in oronasal fluids, urine, faeces and blood. This results in contamination of the pig's environment, including flooring, equipment and vehicles. Transportation-related risk factors therefore are likely to play an important role in ASF spread, though evidence thus far has been largely anecdotal. In addition to the existing AUSVETPLAN ASF plan, efforts should be made to improve transportation biosecurity, from the time a pig leaves the farm to its destination. Collection of data that could quantify the capabilities and capacity of Australia to clean and disinfect livestock trucks would help to determine if private and/or public sector investment should be made in this area of biosecurity. No peer-reviewed research was identified that described a specific process for cleaning and disinfecting a livestock truck known to be contaminated with ASF virus, though literature suggests that transportation is an important route of transmission for moving the virus between farms and countries.
Collapse
Affiliation(s)
- E J Neumann
- Riddet Institute, Massey University, Tennent Drive, Palmerston North, 4474, New Zealand
| | - W F Hall
- William Hall and Associates, 114 Swan Drive, Googong, New South Wales, 2620, Australia
| | - J Dahl
- Danish Agriculture and Food Council, Axelborg, Copenhagen V, Denmark
| | - D Hamilton
- South Australian Research and Development Institute, South Australia, 5064, Australia
| | - A Kurian
- Epi-Insight Limited, 17 Main South Road, East Taieri, 9024, New Zealand
| |
Collapse
|
28
|
Awosanya EJ, Olugasa BO, Gimba FI, Sabri MY, Ogundipe GA. Detection of African swine fever virus in pigs in Southwest Nigeria. Vet World 2021; 14:1840-1845. [PMID: 34475707 PMCID: PMC8404123 DOI: 10.14202/vetworld.2021.1840-1845] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/17/2021] [Accepted: 06/08/2021] [Indexed: 12/04/2022] Open
Abstract
BACKGROUND AND AIM Nigeria experienced repeated outbreaks of African swine fever (ASF) in pig herds between 1997 and 2005 in the southwest region of the country. ASF is believed to currently be enzootic in this region. The status of enzootic transmission of ASF virus strain to pigs is; however, unknown. Twenty-three genotypes of the ASF virus based on the p72 gene are found across Africa. This study aimed to identify the current circulating field strain(s) of the ASF virus in Southwest Nigeria and characterized evolutionary trends. MATERIALS AND METHODS DNA samples were extracted from 144 pooled blood samples obtained from 2012 to 2013 following the manufacturer's instructions. DNA was used for conventional polymerase chain reaction using primers targeting the p72 gene and amplified products sequenced with Sanger's sequencing. Sequences were analyzed for homology and phylogenetic relationships. RESULTS Eleven of 144 samples (7.6%) showed bands at 950 bp. A new field strain of ASF virus of genotype I that shared ancestry with ASF virus strains or isolates from Spain and Brazil was identified among pig herds. The new strain differs phylogenetically in amino acid composition compared with previously identified ASF virus field strains. CONCLUSION The currently circulating field strain of ASF virus suggests a mutation responsible for decreased morbidity and mortality recorded in sporadic cases.
Collapse
Affiliation(s)
- Emmanuel Jolaoluwa Awosanya
- Department of Veterinary Public Health and Preventive Medicine, Faculty of Veterinary Medicine, University of Ibadan, Ibadan, Nigeria
| | - Babasola Oluseyi Olugasa
- Department of Veterinary Public Health and Preventive Medicine, Faculty of Veterinary Medicine, University of Ibadan, Ibadan, Nigeria
| | - Fufa Ido Gimba
- Department of Veterinary Pathology and Microbiology, Faculty of Veterinary Medicine, Universiti Putra Malaysia, 43400 UPM, Serdang, Selangor, Malaysia
| | - Mohd Yusoff Sabri
- Department of Veterinary Pathology and Microbiology, Faculty of Veterinary Medicine, Universiti Putra Malaysia, 43400 UPM, Serdang, Selangor, Malaysia
| | - Gabriel Adetunji Ogundipe
- Department of Veterinary Public Health and Preventive Medicine, Faculty of Veterinary Medicine, University of Ibadan, Ibadan, Nigeria
| |
Collapse
|
29
|
Bradhurst R, Garner G, Hóvári M, de la Puente M, Mintiens K, Yadav S, Federici T, Kopacka I, Stockreiter S, Kuzmanova I, Paunov S, Cacinovic V, Rubin M, Szilágyi J, Kókány ZS, Santi A, Sordilli M, Sighinas L, Spiridon M, Potocnik M, Sumption K. Development of a transboundary model of livestock disease in Europe. Transbound Emerg Dis 2021; 69:1963-1982. [PMID: 34169659 PMCID: PMC9545780 DOI: 10.1111/tbed.14201] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/19/2020] [Accepted: 06/01/2021] [Indexed: 12/03/2022]
Abstract
Epidemiological models of notifiable livestock disease are typically framed at a national level and targeted for specific diseases. There are inherent difficulties in extending models beyond national borders as details of the livestock population, production systems and marketing systems of neighbouring countries are not always readily available. It can also be a challenge to capture heterogeneities in production systems, control policies, and response resourcing across multiple countries, in a single transboundary model. In this paper, we describe EuFMDiS, a continental‐scale modelling framework for transboundary animal disease, specifically designed to support emergency animal disease planning in Europe. EuFMDiS simulates the spread of livestock disease within and between countries and allows control policies to be enacted and resourced on a per‐country basis. It provides a sophisticated decision support tool that can be used to look at the risk of disease introduction, establishment and spread; control approaches in terms of effectiveness and costs; resource management; and post‐outbreak management issues.
Collapse
Affiliation(s)
- Richard Bradhurst
- Centre of Excellence for Biosecurity Risk Analysis, School of BioSciences, University of Melbourne, Melbourne, Australia
| | - Graeme Garner
- European Commission for the Control of Foot-and-Mouth Disease, FAO, Rome, Italy
| | - Márk Hóvári
- European Commission for the Control of Foot-and-Mouth Disease, FAO, Rome, Italy
| | - Maria de la Puente
- European Commission for the Control of Foot-and-Mouth Disease, FAO, Rome, Italy
| | - Koen Mintiens
- European Commission for the Control of Foot-and-Mouth Disease, FAO, Rome, Italy
| | - Shankar Yadav
- European Commission for the Control of Foot-and-Mouth Disease, FAO, Rome, Italy
| | - Tiziano Federici
- European Commission for the Control of Foot-and-Mouth Disease, FAO, Rome, Italy
| | - Ian Kopacka
- Division for Data, Statistics and Risk Assessment, Austrian Agency for Health and Food Safety (AGES), Graz, Austria
| | - Simon Stockreiter
- Division for Data, Statistics and Risk Assessment, Austrian Agency for Health and Food Safety (AGES), Graz, Austria
| | | | | | - Vladimir Cacinovic
- Veterinary Inspection and Control of Food Safety Sector, State Inspectorate, Zagreb, Croatia
| | - Martina Rubin
- Veterinary and Food Safety Directorate, Ministry of Agriculture, Zagreb, Croatia
| | | | | | - Annalisa Santi
- Veterinary Epidemiology Unit, Istituto Zooprofilattico della Lombardia e dell'Emilia-Romagna
| | - Marco Sordilli
- Istituto Zooprofilattico Sperimentale del Lazio e della Toscana, Rome, Italy
| | - Laura Sighinas
- National Sanitary Veterinary and Food Safety Authority, Bucharest, Romania
| | - Mihaela Spiridon
- National Sanitary Veterinary and Food Safety Authority, Bucharest, Romania
| | - Marko Potocnik
- Animal Health and Animal Welfare Division Administration of the Republic of Slovenia for Food Safety, Veterinary Sector and Plant Protection, Ljubljana, Slovenia
| | - Keith Sumption
- European Commission for the Control of Foot-and-Mouth Disease, FAO, Rome, Italy
| |
Collapse
|
30
|
Shurson GC, Urriola PE, van de Ligt JLG. Can we effectively manage parasites, prions, and pathogens in the global feed industry to achieve One Health? Transbound Emerg Dis 2021; 69:4-30. [PMID: 34171167 DOI: 10.1111/tbed.14205] [Citation(s) in RCA: 7] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/26/2021] [Revised: 06/14/2021] [Accepted: 06/22/2021] [Indexed: 11/30/2022]
Abstract
Prions and certain endoparasites, bacteria, and viruses are internationally recognized as types of disease-causing biological agents that can be transmitted from contaminated feed to animals. Historically, foodborne biological hazards such as prions (transmissible spongiform encephalopathy), endoparasites (Trichinella spiralis, Toxoplasma gondii), and pathogenic bacteria (Salmonella spp., Listeria monocytogenes, Escherichia coli O157, Clostridium spp., and Campylobacter spp.) were major food safety concerns from feeding uncooked or improperly heated animal-derived food waste and by-products. However, implementation of validated thermal processing conditions along with verifiable quality control procedures has been effective in enabling safe use of these feed materials in animal diets. More recently, the occurrence of global Porcine Epidemic Diarrhea Virus and African Swine Fever Virus epidemics, dependence on international feed ingredient supply chains, and the discovery that these viruses can survive in some feed ingredient matrices under environmental conditions of trans-oceanic shipments has created an urgent need to develop and implement rigorous biosecurity protocols that prevent and control animal viruses in feed ingredients. Implementation of verifiable risk-based preventive controls, traceability systems from origin to destination, and effective mitigation procedures is essential to minimize these food security, safety, and sustainability threats. Creating a new biosafety and biosecurity framework will enable convergence of the diverging One Health components involving low environmental impact and functional feed ingredients that are perceived as having elevated biosafety risks when used in animal feeds.
Collapse
Affiliation(s)
- Gerald C Shurson
- Department of Animal Science, College of Food Agricultural and Natural Resource Sciences, University of Minnesota, St. Paul, Minnesota, USA
| | - Pedro E Urriola
- Department of Animal Science, College of Food Agricultural and Natural Resource Sciences, University of Minnesota, St. Paul, Minnesota, USA
| | - Jennifer L G van de Ligt
- Department of Veterinary Population Medicine, College of Veterinary Medicine, University of Minnesota, St. Paul, Minnesota, USA
| |
Collapse
|
31
|
Abstract
AbstractPorcine circovirus type 3 (PCV3), which was first detected in the United States of America in 2015, is a potential threat to the swine industry. However, the prevalence of PCV3 in Shanxi Province, China, is unclear. In this research, the prevalence and genetic diversity of PCV3 were investigated in above area. Lung tissue samples (n = 491) from 19 pig slaughterhouses across 11 cities throughout Shanxi Province were analyzed for PCV3 infection by PCR in 2019. The results showed that PCV3 positive rates in slaughterhouses and individuals were 100% (19/19) and 86.76% (426/491), respectively. PCV2 and PCV3 double-positive rates in slaughterhouses and individuals were 100% (19/19) and 59.27% (291/491), respectively. PCR positive samples were further sequenced and 8 PCV3 isolates were identified. The nucleotide homology of these isolates with other PCV3 isolates in NCBI database was 97.45–99.90%. A phylogenetic analysis, based on the complete genomic sequence and ORF2, divided these PCV3 strains into 2 major groups. Based on A24/V and R27/K amino acid mutations of capsid protein, the 8 identified PCV3 strains were separated to 2 clades. This was the first detailed investigation into the epidemiology of PCV3 in Shanxi Province. Our findings enabled us to assess the possibility of widespread transmission from this region. Thus, current findings establish a basis for further studies of genetic variations in PCV3 strains circulating in China.
Collapse
|
32
|
Njau EP, Domelevo Entfellner JB, Machuka EM, Bochere EN, Cleaveland S, Shirima GM, Kusiluka LJ, Upton C, Bishop RP, Pelle R, Okoth EA. The first genotype II African swine fever virus isolated in Africa provides insight into the current Eurasian pandemic. Sci Rep 2021; 11:13081. [PMID: 34158551 PMCID: PMC8219699 DOI: 10.1038/s41598-021-92593-2] [Citation(s) in RCA: 30] [Impact Index Per Article: 10.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/11/2020] [Accepted: 05/24/2021] [Indexed: 02/05/2023] Open
Abstract
African swine fever (ASF) caused by the African swine fever virus (ASFV) is ranked by OIE as the most important source of mortality in domestic pigs globally and is indigenous to African wild suids and soft ticks. Despite two ASFV genotypes causing economically devastating epidemics outside the continent since 1961, there have been no genome-level analyses of virus evolution in Africa. The virus was recently transported from south-eastern Africa to Georgia in 2007 and has subsequently spread to Russia, eastern Europe, China, and south-east Asia with devastating socioeconomic consequences. To date, two of the 24 currently described ASFV genotypes defined by sequencing of the p72 gene, namely genotype I and II, have been reported outside Africa, with genotype II being responsible for the ongoing pig pandemic. Multiple complete genotype II genome sequences have been reported from European, Russian and Chinese virus isolates but no complete genome sequences have yet been reported from Africa. We report herein the complete genome of a Tanzanian genotype II isolate, Tanzania/Rukwa/2017/1, collected in 2017 and determined using an Illumina short read strategy. The Tanzania/Rukwa/2017/1 sequence is 183,186 bp in length (in a single contig) and contains 188 open reading frames. Considering only un-gapped sites in the pairwise alignments, the new sequence has 99.961% identity with the updated Georgia 2007/1 reference isolate (FR682468.2), 99.960% identity with Polish isolate Pol16_29413_o23 (MG939586) and 99.957% identity with Chinese isolate ASFV-wbBS01 (MK645909.1). This represents 73 single nucleotide polymorphisms (SNPs) relative to the Polish isolate and 78 SNPs with the Chinese genome. Phylogenetic analysis indicated that Tanzania/Rukwa/2017/1 clusters most closely with Georgia 2007/1. The majority of the differences between Tanzania/Rukwa/2017/1 and Georgia 2007/1 genotype II genomes are insertions/deletions (indels) as is typical for ASFV. The indels included differences in the length and copy number of the terminal multicopy gene families, MGF 360 and 110. The Rukwa2017/1 sequence is the first complete genotype II genome from a precisely mapped locality in Africa, since the exact origin of Georgia2007/1 is unknown. It therefore provides baseline information for future analyses of the diversity and phylogeography of this globally important genetic sub-group of ASF viruses.
Collapse
Affiliation(s)
- Emma P Njau
- Biosciences Eastern and Central Africa-International Livestock Research Institute Hub, Nairobi, Kenya.
- Nelson Mandela African Institution of Science and Technology, Arusha, Tanzania.
- Sokoine University of Agriculture, P. O. Box 3019, Morogoro, Tanzania.
| | | | - Eunice M Machuka
- Biosciences Eastern and Central Africa-International Livestock Research Institute Hub, Nairobi, Kenya
| | - Edwina N Bochere
- Biosciences Eastern and Central Africa-International Livestock Research Institute Hub, Nairobi, Kenya
| | - Sarah Cleaveland
- Nelson Mandela African Institution of Science and Technology, Arusha, Tanzania
- Institute of Biodiversity, Animal Health and Comparative Medicine, College of Medical, Veterinary and Life Sciences, University of Glasgow, Glasgow, UK
| | - Gabriel M Shirima
- Nelson Mandela African Institution of Science and Technology, Arusha, Tanzania
| | - Lughano J Kusiluka
- Nelson Mandela African Institution of Science and Technology, Arusha, Tanzania
- Mzumbe University, Morogoro, Tanzania
| | - Chris Upton
- Biochemistry and Microbiology, University of Victoria, Victoria, BC, V8W 3P6, Canada
| | - Richard P Bishop
- Biosciences Eastern and Central Africa-International Livestock Research Institute Hub, Nairobi, Kenya
| | - Roger Pelle
- Biosciences Eastern and Central Africa-International Livestock Research Institute Hub, Nairobi, Kenya
| | - Edward A Okoth
- Biosciences Eastern and Central Africa-International Livestock Research Institute Hub, Nairobi, Kenya
| |
Collapse
|
33
|
Manhas PK, Quintela IA, Wu VCH. Enhanced Detection of Major Pathogens and Toxins in Poultry and Livestock With Zoonotic Risks Using Nanomaterials-Based Diagnostics. Front Vet Sci 2021; 8:673718. [PMID: 34164454 PMCID: PMC8215196 DOI: 10.3389/fvets.2021.673718] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/28/2021] [Accepted: 05/11/2021] [Indexed: 11/13/2022] Open
Abstract
Nanotechnology has gained prominence over the recent years in multiple research and application fields, including infectious diseases in healthcare, agriculture, and veterinary science. It remains an attractive and viable option for preventing, diagnosing, and treating diseases in animals and humans. The apparent efficiency of nanomaterials is due to their unique physicochemical properties and biocompatibility. With the persistence of pathogens and toxins in the poultry and livestock industries, rapid diagnostic tools are of utmost importance. Though there are many promising nanomaterials-based diagnostic tests specific to animal disease-causing agents, many have not achieved balanced sensitivity, specificity, reproducibility, and cost-effectiveness. This mini-review explores several types of nanomaterials, which provided enhancement on the sensitivity and specificity of recently reported diagnostic tools related to animal diseases. Recommendations are also provided to facilitate more targeted animal populations into the development of future diagnostic tools specifically for emerging and re-emerging animal diseases posing zoonotic risks.
Collapse
Affiliation(s)
- Priya K Manhas
- Produce Safety and Microbiology Research Unit, U.S. Department of Agriculture, Agricultural Research Service, Western Regional Research Center, Albany, CA, United States
| | - Irwin A Quintela
- Produce Safety and Microbiology Research Unit, U.S. Department of Agriculture, Agricultural Research Service, Western Regional Research Center, Albany, CA, United States
| | - Vivian C H Wu
- Produce Safety and Microbiology Research Unit, U.S. Department of Agriculture, Agricultural Research Service, Western Regional Research Center, Albany, CA, United States
| |
Collapse
|
34
|
Shurson GC, Palowski A, van de Ligt JLG, Schroeder DC, Balestreri C, Urriola PE, Sampedro F. New perspectives for evaluating relative risks of African swine fever virus contamination in global feed ingredient supply chains. Transbound Emerg Dis 2021; 69:31-56. [PMID: 34076354 DOI: 10.1111/tbed.14174] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/23/2021] [Revised: 05/25/2021] [Accepted: 05/28/2021] [Indexed: 12/29/2022]
Abstract
There are no published reports indicating that the African swine fever virus (ASFV) has been detected in feed ingredients or complete feed. This is primarily because there are only a few laboratories in the world that have the biosecurity and analytical capabilities of detecting ASFV in feed. Several in vitro studies have been conducted to evaluate ASFV concentration, viability and inactivation when ASFV was added to various feed ingredients and complete feed. These inoculation studies have shown that some feed matrices support virus survival longer than others and the reasons for this are unknown. Current analytical methodologies have significant limitations in sensitivity, repeatability, ability to detect viable virus particles and association with infectivity. As a result, interpretation of findings using various measures may lead to misleading conclusions. Because of analytical and technical challenges, as well as the lack of ASFV contamination data in feed supply chains, quantitative risk assessments have not been conducted. A few qualitative risk assessments have been conducted, but they have not considered differences in potential scenarios for ASFV contamination between various types of feed ingredient supply chains. Therefore, the purpose of this review is to provide a more holistic understanding of the relative potential risks of ASFV contamination in various global feed ingredient supply chains and provide recommendations for addressing the challenges identified.
Collapse
Affiliation(s)
- Gerald C Shurson
- Department of Animal Science, College of Food Agricultural and Natural Resource Sciences, University of Minnesota, St. Paul, Minnesota, USA
| | - Amanda Palowski
- Department of Animal Science, College of Food Agricultural and Natural Resource Sciences, University of Minnesota, St. Paul, Minnesota, USA
| | - Jennifer L G van de Ligt
- Department of Veterinary Population Medicine, College of Veterinary Medicine, University of Minnesota, St. Paul, Minnesota, USA
| | - Declan C Schroeder
- Department of Veterinary Population Medicine, College of Veterinary Medicine, University of Minnesota, St. Paul, Minnesota, USA
| | - Cecilia Balestreri
- Department of Veterinary Population Medicine, College of Veterinary Medicine, University of Minnesota, St. Paul, Minnesota, USA
| | - Pedro E Urriola
- Department of Animal Science, College of Food Agricultural and Natural Resource Sciences, University of Minnesota, St. Paul, Minnesota, USA
| | - Fernando Sampedro
- Environmental Health Sciences Division, School of Public Health, University of Minnesota, Minneapolis, Minnesota, USA
| |
Collapse
|
35
|
Yue W, Liu Y, Meng Y, Ma H, He J. Prevalence of porcine respiratory pathogens in slaughterhouses in Shanxi Province, China. Vet Med Sci 2021; 7:1339-1346. [PMID: 34021725 PMCID: PMC8294393 DOI: 10.1002/vms3.532] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/08/2020] [Revised: 04/09/2021] [Accepted: 05/03/2021] [Indexed: 11/15/2022] Open
Abstract
Background Porcine respiratory diseases remain the biggest challenge in pig‐based food production and are a public health concern. Despite control measures, persistent outbreaks have been reported worldwide. Objective To establish an early detection mechanism for pig farm disease outbreaks based on slaughterhouse risk and environmental assessment. Methods We investigated the prevalence and risk factors of porcine respiratory disease‐causing pathogens including Mycoplasma hyopneumoniae (MHP), porcine circovirus type 2 (PCV2), porcine reproductive and respiratory syndrome virus (PRRSV) and Haemophilus parasuis (HPS). Polymerase chain reaction (PCR) was used to analyse the lungs of 491 pigs from 19 slaughterhouses across 11 cities in Shanxi Province, China. Results PCR detected MHP, PCV2, PPRSV and HPS in 76.99%, 67.00%, 11.82% and 19.55% of the samples, respectively; 10.12% were negative for all four pathogens. Co‐positivity rates for two and three pathogens were identified. The results confirmed significant correlations between PCV2 and MHP (p = .001, p < .05), HPS and PCV2 (p = .01, p < .05) and MHP and PRRSV (p = .01, p < .05). No significant correlation was observed between HPS and MHP (p = .067, p > .05). Positive MHP and PCV2 rates were low in areas with high vegetation coverage. The overall pathogen positivity rate was higher in both lower and higher temperature environments. Conclusions Interactions among pathogens may increase disease severity. Furthermore, environmental assessment and pathogen surveillance within pig slaughterhouses can be an effective approach for early detection and mitigation of new disease threats before broad dissemination occurs among a herd.
Collapse
Affiliation(s)
- Weidong Yue
- College of Veterinary Medicine, Shanxi Agricultural University, Taigu, PR China
| | - Yihui Liu
- College of Veterinary Medicine, Shanxi Agricultural University, Taigu, PR China
| | - Yukai Meng
- College of Veterinary Medicine, Shanxi Agricultural University, Taigu, PR China
| | - Haili Ma
- College of Veterinary Medicine, Shanxi Agricultural University, Taigu, PR China
| | - Junping He
- College of Veterinary Medicine, Shanxi Agricultural University, Taigu, PR China
| |
Collapse
|
36
|
Gong QL, Sun YH, Yang Y, Zhao B, Wang Q, Li JM, Ge GY, Chen ZY, Shi K, Leng X, Zong Y, Du R. Global Comprehensive Literature Review and Meta-Analysis of Brucella spp. in Swine Based on Publications From 2000 to 2020. Front Vet Sci 2021; 8:630960. [PMID: 34026886 PMCID: PMC8137890 DOI: 10.3389/fvets.2021.630960] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/18/2020] [Accepted: 04/06/2021] [Indexed: 11/13/2022] Open
Abstract
Background: Brucellosis, a zoonotic disease, infects various hosts, including swine and humans. It has reemerged in recent years as a public health concern, and current studies on brucellosis infection in swine have been conducted worldwide. However, no meta-analyses of global brucellosis infection in swine have been published. The aim of this study was to provide an overview of Brucella species (spp.) in swine worldwide and the factors associated with its persistence. Results: We searched seven databases for published epidemiological studies on brucellosis in pigs, including the Chinese National Knowledge Infrastructure, Wanfang Data, SpringerLink, ScienceDirect, Web of Science, the VIP Chinese Journal Database and PubMed. We selected 119 articles published from January 1, 2000 to January 3, 2020 for inclusion in the meta-analysis and analyzed the data using a random-effects model. Funnel plots and Egger's test showed significant publication bias in the included studies. The results of the sensitivity analysis showed that our study was relatively stable and reliable. The prevalence of brucellosis in swine was 2.1% (95% CI: 1.6–2.6), of which the highest infection rate, which was found in Europe, was 17.4% (95% CI: 11.1–24.9). The prevalence in feral pigs (15.0%, 95% CI: 8.4–23.2) was higher than that in domestic pigs (1.1%, 95% CI 0.2–2.5). The prevalence in high-income countries (15.7%, 95% CI 8.0–25.3) was significantly higher than that in middle- (0.8%, 95% CI 0.5–1.1), and low-income countries (0.1%, 95% CI 0.0–0.2). The prevalence was highest in finishing pigs at 4.9% (95% CI 0.9–11.0), and lowest among suckling pigs at 0% (95% CI 0.0–0.5). Conclusion: The Brucella prevalence in pig herds currently is distributed widely throughout the world. In some countries, swine brucellosis may be a neglected zoonotic disease. We recommend long-term monitoring of the prevalence of brucellosis in domestic and wild pig herds. Attention should also be paid to animal welfare on intensive pig farms; controlling the breeding density may play an important role in reducing the spread of brucellosis among pigs.
Collapse
Affiliation(s)
- Qing-Long Gong
- College of Chinese Medicine Materials, Jilin Agricultural University, Changchun, China.,College of Animal Science and Technology, Jilin Agricultural University, Changchun, China
| | - Yu-Han Sun
- College of Chinese Medicine Materials, Jilin Agricultural University, Changchun, China
| | - Yang Yang
- College of Chinese Medicine Materials, Jilin Agricultural University, Changchun, China
| | - Bo Zhao
- College of Animal Science and Technology, Jilin Agricultural University, Changchun, China
| | - Qi Wang
- College of Animal Science and Technology, Jilin Agricultural University, Changchun, China
| | - Jian-Ming Li
- College of Chinese Medicine Materials, Jilin Agricultural University, Changchun, China
| | - Gui-Yang Ge
- College of Animal Science and Technology, Jilin Agricultural University, Changchun, China
| | - Zi-Yang Chen
- College of Animal Science and Technology, Jilin Agricultural University, Changchun, China
| | - Kun Shi
- College of Chinese Medicine Materials, Jilin Agricultural University, Changchun, China
| | - Xue Leng
- College of Chinese Medicine Materials, Jilin Agricultural University, Changchun, China
| | - Ying Zong
- College of Chinese Medicine Materials, Jilin Agricultural University, Changchun, China
| | - Rui Du
- College of Chinese Medicine Materials, Jilin Agricultural University, Changchun, China.,Laboratory of Production and Product Application of Sika Deer of Jilin Province, Jilin Agricultural University, Changchun, China.,Key Lab of Animal Production, Product Quality and Security, Ministry of Education, Jilin Agricultural University, Changchun, China
| |
Collapse
|
37
|
Shurson GC, Hung YT, Jang JC, Urriola PE. Measures Matter-Determining the True Nutri-Physiological Value of Feed Ingredients for Swine. Animals (Basel) 2021; 11:1259. [PMID: 33925594 PMCID: PMC8146707 DOI: 10.3390/ani11051259] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/28/2021] [Revised: 04/05/2021] [Accepted: 04/12/2021] [Indexed: 01/10/2023] Open
Abstract
Many types of feed ingredients are used to provide energy and nutrients to meet the nutritional requirements of swine. However, the analytical methods and measures used to determine the true nutritional and physiological ("nutri-physiological") value of feed ingredients affect the accuracy of predicting and achieving desired animal responses. Some chemical characteristics of feed ingredients are detrimental to pig health and performance, while functional components in other ingredients provide beneficial health effects beyond their nutritional value when included in complete swine diets. Traditional analytical procedures and measures are useful for determining energy and nutrient digestibility of feed ingredients, but do not adequately assess their true physiological or biological value. Prediction equations, along with ex vivo and in vitro methods, provide some benefits for assessing the nutri-physiological value of feed ingredients compared with in vivo determinations, but they also have some limitations. Determining the digestion kinetics of the different chemical components of feed ingredients, understanding how circadian rhythms affect feeding behavior and the gastrointestinal microbiome of pigs, and accounting for the functional properties of many feed ingredients in diet formulation are the emerging innovations that will facilitate improvements in precision swine nutrition and environmental sustainability in global pork-production systems.
Collapse
Affiliation(s)
- Gerald C. Shurson
- Department of Animal Science, University of Minnesota, St. Paul, MN 55108, USA; (Y.-T.H.); (J.C.J.); (P.E.U.)
| | | | | | | |
Collapse
|
38
|
Park Y, Oh Y, Wang M, Ganges L, Bohórquez JA, Park S, Gu S, Park J, Lee S, Kim J, Sohn EJ. A Novel E2 Glycoprotein Subunit Marker Vaccine Produced in Plant Is Able to Prevent Classical Swine Fever Virus Vertical Transmission after Double Vaccination. Vaccines (Basel) 2021; 9:vaccines9050418. [PMID: 33922120 PMCID: PMC8143534 DOI: 10.3390/vaccines9050418] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/31/2021] [Revised: 04/16/2021] [Accepted: 04/18/2021] [Indexed: 12/16/2022] Open
Abstract
The efficacy of a novel subunit vaccine candidate, based in the CSFV E2 glycoprotein produced in plants to prevent classical swine fever virus (CSFV) vertical transmission, was evaluated. A Nicotiana benthamiana tissue culture system was used to obtain a stable production of the E2-glycoprotein fused to the porcine Fc region of IgG. Ten pregnant sows were divided into three groups: Groups 1 and 2 (four sows each) were vaccinated with either 100 μg/dose or 300 μg/dose of the subunit vaccine at 64 days of pregnancy. Group 3 (two sows) was injected with PBS. Groups 1 and 2 were boosted with the same vaccine dose. At 10 days post second vaccination, the sows in Groups 2 and 3 were challenged with a highly virulent CSFV strain. The vaccinated sows remained clinically healthy and seroconverted rapidly, showing efficient neutralizing antibodies. The fetuses from vaccinated sows did not show gross lesions, and all analyzed tissue samples tested negative for CSFV replication. However, fetuses of non-vaccinated sows had high CSFV replication in tested tissue samples. The results suggested that in vaccinated sows, the plant produced E2 marker vaccine induced the protective immunogenicity at challenge, leading to protection from vertical transmission to fetuses.
Collapse
Affiliation(s)
- Youngmin Park
- BioApplications Inc., Pohang 37668, Korea; (Y.P.); (S.P.); (S.G.); (J.P.); (S.L.); (J.K.)
| | - Yeonsu Oh
- College of Veterinary Medicine and Institute of Veterinary Science, Kangwon National University, Chuncheon 24341, Korea;
| | - Miaomiao Wang
- OIE Reference Laboratory for Classical Swine Fever, IRTA-CReSA, 08193 Barcelona, Spain; (M.W.); (L.G.); (J.A.B.)
| | - Llilianne Ganges
- OIE Reference Laboratory for Classical Swine Fever, IRTA-CReSA, 08193 Barcelona, Spain; (M.W.); (L.G.); (J.A.B.)
| | - José Alejandro Bohórquez
- OIE Reference Laboratory for Classical Swine Fever, IRTA-CReSA, 08193 Barcelona, Spain; (M.W.); (L.G.); (J.A.B.)
| | - Soohong Park
- BioApplications Inc., Pohang 37668, Korea; (Y.P.); (S.P.); (S.G.); (J.P.); (S.L.); (J.K.)
| | - Sungmin Gu
- BioApplications Inc., Pohang 37668, Korea; (Y.P.); (S.P.); (S.G.); (J.P.); (S.L.); (J.K.)
| | - Jungae Park
- BioApplications Inc., Pohang 37668, Korea; (Y.P.); (S.P.); (S.G.); (J.P.); (S.L.); (J.K.)
| | - Sangmin Lee
- BioApplications Inc., Pohang 37668, Korea; (Y.P.); (S.P.); (S.G.); (J.P.); (S.L.); (J.K.)
| | - Jongkook Kim
- BioApplications Inc., Pohang 37668, Korea; (Y.P.); (S.P.); (S.G.); (J.P.); (S.L.); (J.K.)
| | - Eun-Ju Sohn
- BioApplications Inc., Pohang 37668, Korea; (Y.P.); (S.P.); (S.G.); (J.P.); (S.L.); (J.K.)
- Correspondence: ; Tel.: +82-54-223-2090; Fax: +80-54-223-2088
| |
Collapse
|
39
|
Gebhardt JT, Dritz SS, Jones CK, Woodworth JC, Paulk CB. Lessons learned from preliminary monitoring for African swine fever virus in a region of ongoing transmission. J Am Vet Med Assoc 2021; 258:35-38. [PMID: 33314976 DOI: 10.2460/javma.258.1.35] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022]
|
40
|
Tanihara F, Hirata M, Nguyen NT, Le QA, Wittayarat M, Fahrudin M, Hirano T, Otoi T. Generation of CD163-edited pig via electroporation of the CRISPR/Cas9 system into porcine in vitro-fertilized zygotes. Anim Biotechnol 2021; 32:147-154. [PMID: 31558095 DOI: 10.1080/10495398.2019.1668801] [Citation(s) in RCA: 11] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/20/2022]
Abstract
CD163 is a putative fusion receptor for virus of porcine reproductive and respiratory syndrome (PRRS). In this study, we introduced a CRISPR/Cas9 system [guide RNAs (gRNAs) with Cas9 protein] targeting the CD163 gene into in vitro-fertilized porcine zygotes by electroporation to generate CD163-modified pigs. First, we designed four types of gRNAs that targeted distinct sites in exon 7 of the CD163 gene. Cas9 protein with different gRNAs was introduced into in vitro-fertilized zygotes by electroporation. When the electroporated zygotes were allowed to develop to blastocysts in vitro and the genome editing efficiency was evaluated using these blastocysts, three (gRNA1, 2, and 4) of the four gRNAs tested successfully edited the CD163 gene. To generate CD163-knockout pigs, a total of 200 electroporated zygotes using these three gRNAs were transferred into the oviducts of oestrous-synchronized surrogate and the surrogate gave birth to eight piglets. Subsequent sequence analysis revealed that one of the piglets carried no wild-type sequence in CD163 gene. The other seven piglets carried only wild-type sequence. Thus, we successfully generated a CD163-edited pig by electroporation of the CRISPR/Cas9 system into in vitro-fertilized zygotes, although further improvement is required to generate genetically modified pigs with high efficiency.
Collapse
Affiliation(s)
- Fuminori Tanihara
- Laboratory of Animal Reproduction, Faculty of Bioscience and Bioindustry, Tokushima University, Tokushima, Japan
| | - Maki Hirata
- Laboratory of Animal Reproduction, Faculty of Bioscience and Bioindustry, Tokushima University, Tokushima, Japan
| | - Nhien Thi Nguyen
- Laboratory of Animal Reproduction, Faculty of Bioscience and Bioindustry, Tokushima University, Tokushima, Japan
| | - Quynh Anh Le
- Laboratory of Animal Reproduction, Faculty of Bioscience and Bioindustry, Tokushima University, Tokushima, Japan
| | - Manita Wittayarat
- Faculty of Veterinary Science, Prince of Songkla University, Songkhla, Thailand
| | - Mokhamad Fahrudin
- Faculty of Veterinary Science, Bogor Agricultural University, Bogor, Indonesia
| | - Takayuki Hirano
- Laboratory of Animal Reproduction, Faculty of Bioscience and Bioindustry, Tokushima University, Tokushima, Japan
| | - Takeshige Otoi
- Laboratory of Animal Reproduction, Faculty of Bioscience and Bioindustry, Tokushima University, Tokushima, Japan
| |
Collapse
|
41
|
Seroprevalence of the viral pig diseases among backyard pigs in Chiang Mai, Thailand. Prev Vet Med 2021; 190:105330. [PMID: 33774502 DOI: 10.1016/j.prevetmed.2021.105330] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/29/2020] [Revised: 03/12/2021] [Accepted: 03/15/2021] [Indexed: 11/23/2022]
Abstract
The Participatory One-Health Disease Detection project (PODD) (www.cmonehealth.org) developed a health-based surveillance system with the local government of Chiang Mai community ownership that has been created a mobile application on smartphone for reporting an abnormal event, especially animal health. Previously, the PODD project has obtained a significant number of pig abnormal events. Therefore, there are likely to be some diseases that are currently circulating among backyard pigs. A cross-sectional serological study was undertaken to determine the risk factors for virus infection and prevalence of antibodies against the classical swine fever virus (CSFV), porcine reproductive and respiratory syndrome virus (PRRSV), porcine circovirus type 2 (PCV2) and influenza A virus (IAV) among backyard pigs in Chiang Mai, Thailand. Antibodies against the CSFV, PRRSV and PCV2 in backyard pigs were shown in swine level to be 14 % (95 % CI: 9-20), 14 % (95 % CI: 10-19), and 15 % (95 % CI: 8-23), respectively. For the household level, antibodies against the CSFV, PRRSV and PCV2 were found to be 23 % (95 % CI: 13-37), 22 % (95 % CI: 14-23), and 48 % (95 % CI: 32-63), respectively, while antibodies against IAV were shown to be absent. The use of artificial insemination for breeding purposes has been considered to be a significant risk factor associated with PRRSV (OR = 21.08, 95 % CI: 1.92-232.02) and CSFV (OR = 7.7, 95 % CI: 1.49-39.90) infections. Meanwhile, a risk factor for PCV2 infection was found to significantly involve the feeding of pigs with commercial feed (OR = 9.64, 95 % CI: 1.85-50.26). The findings of this study indicate that infections with CSFV, PRRSV, and PCV2 remain a significant concern and may have an impact on the growth performance of the backyard pigs. The lack of antibodies against the influenza A virus has indicated a low degree of interspecies transmission of influenza A among backyard pigs in Chiang Mai, Thailand. Effective control measures need to be prepared and implemented, and these should include the strict regulation of pig imports as a free source of the viruses along with effective animal quarantine, policies, and appropriate vaccination programs.
Collapse
|
42
|
Nielsen SS, Alvarez J, Bicout DJ, Calistri P, Depner K, Drewe JA, Garin‐Bastuji B, Gonzales Rojas JL, Gortazar Schmidt C, Herskin M, Michel V, Miranda Chueca MÁ, Pasquali P, Roberts HC, Sihvonen LH, Spoolder H, Stahl K, Velarde A, Winckler C, Abrahantes JC, Dhollander S, Ivanciu C, Papanikolaou A, Van der Stede Y, Blome S, Guberti V, Loi F, More S, Olsevskis E, Thulke HH, Viltrop A. ASF Exit Strategy: Providing cumulative evidence of the absence of African swine fever virus circulation in wild boar populations using standard surveillance measures. EFSA J 2021; 19:e06419. [PMID: 33717352 PMCID: PMC7926520 DOI: 10.2903/j.efsa.2021.6419] [Citation(s) in RCA: 17] [Impact Index Per Article: 5.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/06/2023] Open
Abstract
EFSA assessed the role of seropositive wild boar in African swine fever (ASF) persistence. Surveillance data from Estonia and Latvia investigated with a generalised equation method demonstrated a significantly slower decline in seroprevalence in adult animals compared with subadults. The seroprevalence in adults, taking more than 24 months to approach zero after the last detection of ASFV circulation, would be a poor indicator to demonstrate the absence of virus circulation. A narrative literature review updated the knowledge on the mortality rate, the duration of protective immunity and maternal antibodies and transmission parameters. In addition, parameters potentially leading to prolonged virus circulation (persistence) in wild boar populations were reviewed. A stochastic explicit model was used to evaluate the dynamics of virus prevalence, seroprevalence and the number of carcasses attributed to ASF. Secondly, the impact of four scenarios on the duration of ASF virus (ASFV) persistence was evaluated with the model, namely a: (1) prolonged, lifelong infectious period, (2) reduction in the case-fatality rate and prolonged transient infectiousness; (3) change in duration of protective immunity and (4) change in the duration of protection from maternal antibodies. Only the lifelong infectious period scenario had an important prolonging effect on the persistence of ASF. Finally, the model tested the performance of different proposed surveillance strategies to provide evidence of the absence of virus circulation (Exit Strategy). A two-phase approach (Screening Phase, Confirmation Phase) was suggested for the Exit Strategy. The accuracy of the Exit Strategy increases with increasing numbers of carcasses collected and tested. The inclusion of active surveillance based on hunting has limited impact on the performance of the Exit Strategy compared with lengthening of the monitoring period. This performance improvement should be reasonably balanced against an unnecessary prolonged 'time free' with only a marginal gain in performance. Recommendations are provided for minimum monitoring periods leading to minimal failure rates of the Exit Strategy. The proposed Exit Strategy would fail with the presence of lifelong infectious wild boar. That said, it should be emphasised that the existence of such animals is speculative, based on current knowledge.
Collapse
|
43
|
A Review of Risk Factors of African Swine Fever Incursion in Pig Farming within the European Union Scenario. Pathogens 2021; 10:pathogens10010084. [PMID: 33478169 PMCID: PMC7835761 DOI: 10.3390/pathogens10010084] [Citation(s) in RCA: 22] [Impact Index Per Article: 7.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/23/2020] [Revised: 01/15/2021] [Accepted: 01/18/2021] [Indexed: 12/21/2022] Open
Abstract
African swine fever (ASF) is a notifiable viral disease of pigs and wild boars that could lead to serious economic losses for the entire European pork industry. As no effective treatment or vaccination is available, disease prevention and control rely on strictly enforced biosecurity measures tailored to the specific risk factors of ASF introduction within domestic pig populations. Here, we present a review addressing the risk factors associated with different European pig farming systems in the context of the actual epidemiological scenario. A list of keywords was combined into a Boolean query, “African swine fever” AND (“Risk factors” OR “Transmission” OR “Spread” OR “Pig farming” OR “Pigs” OR “Wild boars”); was run on 4 databases; and resulted in 52 documents of interest being reviewed. Based on our review, each farming system has its own peculiar risk factors: commercial farms, where best practices are already in place, may suffer from unintentional breaches in biosecurity, while backyard and outdoor farms may suffer from poor ASF awareness, sociocultural factors, and contact with wild boars. In the literature selected for our review, human-related activities and behaviours are presented as the main risks, but we also stress the need to implement biosecurity measures also tailored to risks factors that are specific for the different pig farming practices in the European Union (EU).
Collapse
|
44
|
Shahhosseini N, Frederick C, Letourneau-Montminy MP, Marie-Odile BB, Kobinger GP, Wong G. Computational genomics of Torque teno sus virus and Porcine circovirus in swine samples from Canada. Res Vet Sci 2020; 134:171-180. [PMID: 33387757 DOI: 10.1016/j.rvsc.2020.12.010] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/19/2020] [Revised: 11/06/2020] [Accepted: 12/18/2020] [Indexed: 11/26/2022]
Abstract
Emerging viral diseases include pathogens that can threaten the health of the Canadian swineherd. Anelloviruses and Circoviruses comprise of pathogens with veterinary significance. The aim of this study was to determine the genomic organization and phylogenetic relationships of Torque teno sus virus (TTsusV) and Porcine circovirus (PCV) from Canadian pig samples. Fecal and tissue specimens were collected during the winter, spring and summer of 2018. We utilized either virus- or genus-specific PCR assays to characterize the occurrence and genetic diversity of TTsusV and PCV in Canadian pigs. Pairwise comparison of all partial sequences and identity calculation was performed using MAFFT algorithm implemented in Sequence Demarcation Tool (SDT). The obtained full-length sequences were aligned using ClustalW, and phylogeny was inferred using a Maximum likelihood (ML) method by Geneious software. The PCR detection results revealed that the overall positive rate of TTsusV type-1 and type-2 was 45.6% and 32.6%, respectively. The TTsusV isolate MK990454 from Canada clustered in the subtype TTsusV1b, while the TTsusV isolate MK872392 fell in the subtype TTsusV2c, and all showed similarity to known American and Chinese isolates. In addition, our screening PCR showed that 2.7% of stool samples were positive for PCV1. Phylogenetic analysis using the full-length sequence demonstrated that PCV1 (MK872393) isolated from Quebec clustered with other Chinese PCV1 strains. Despite the far geographical distance between Canada and China, the close similarity between Canadian and Chinese TTsusV1 and 2, and PCV1 sequences may be explained by a considerable amount of pig trade between these two nations.
Collapse
Affiliation(s)
- Nariman Shahhosseini
- Département de Microbiologie-Infectiologie et d'Immunologie, Université Laval, Québec City, Québec, Canada
| | - Christina Frederick
- Department of Biochemistry, Microbiology and Bioinformatics, Université Laval, Québec City, Québec, Canada
| | | | - Benoit-Biancamano Marie-Odile
- Research Group on Infectious Diseases in Production Animals (GREMIP) and Swine and Poultry Infectious Disease Research Center (CRIPA), Faculty of Veterinary Medicine, Université de Montréal, Saint-Hyacinthe, QC, Canada
| | - Gary P Kobinger
- Département de Microbiologie-Infectiologie et d'Immunologie, Université Laval, Québec City, Québec, Canada; Department of Medical Microbiology, University of Manitoba, Winnipeg, Manitoba, Canada; Department of Immunology, University of Manitoba, Winnipeg, Manitoba, Canada; Department of Pathology and Laboratory Medicine, University of Pennsylvania School of Medicine, Philadelphia, PA, USA
| | - Gary Wong
- Département de Microbiologie-Infectiologie et d'Immunologie, Université Laval, Québec City, Québec, Canada; Institut Pasteur of Shanghai, Chinese Academy of Sciences, Shanghai, China.
| |
Collapse
|
45
|
Brown VR, Miller RS, McKee SC, Ernst KH, Didero NM, Maison RM, Grady MJ, Shwiff SA. Risks of introduction and economic consequences associated with African swine fever, classical swine fever and foot-and-mouth disease: A review of the literature. Transbound Emerg Dis 2020; 68:1910-1965. [PMID: 33176063 DOI: 10.1111/tbed.13919] [Citation(s) in RCA: 9] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/30/2020] [Revised: 10/13/2020] [Accepted: 11/06/2020] [Indexed: 12/31/2022]
Abstract
African swine fever (ASF), classical swine fever (CSF) and foot-and-mouth disease (FMD) are considered to be three of the most detrimental animal diseases and are currently foreign to the U.S. Emerging and re-emerging pathogens can have tremendous impacts in terms of livestock morbidity and mortality events, production losses, forced trade restrictions, and costs associated with treatment and control. The United States is the world's top producer of beef for domestic and export use and the world's third-largest producer and consumer of pork and pork products; it has also recently been either the world's largest or second largest exporter of pork and pork products. Understanding the routes of introduction into the United States and the potential economic impact of each pathogen are crucial to (a) allocate resources to prevent routes of introduction that are believed to be more probable, (b) evaluate cost and efficacy of control methods and (c) ensure that protections are enacted to minimize impact to the most vulnerable industries. With two scoping literature reviews, pulled from global data, this study assesses the risk posed by each disease in the event of a viral introduction into the United States and illustrates what is known about the economic costs and losses associated with an outbreak.
Collapse
Affiliation(s)
- Vienna R Brown
- National Feral Swine Damage Management Program, United States Department of Agriculture, Animal and Plant Health Inspection Service, Fort Collins, CO, USA
| | - Ryan S Miller
- Center for Epidemiology and Animal Health, United States Department of Agriculture, Animal and Plant Health Inspection Service, Veterinary Services, Fort Collins, CO, USA
| | - Sophie C McKee
- National Feral Swine Damage Management Program, United States Department of Agriculture, Animal and Plant Health Inspection Service, Fort Collins, CO, USA.,Department of Economics, Colorado State University, Fort Collins, CO, USA
| | - Karina H Ernst
- National Feral Swine Damage Management Program, United States Department of Agriculture, Animal and Plant Health Inspection Service, Fort Collins, CO, USA.,Department of Economics, Colorado State University, Fort Collins, CO, USA
| | - Nicole M Didero
- National Feral Swine Damage Management Program, United States Department of Agriculture, Animal and Plant Health Inspection Service, Fort Collins, CO, USA.,Department of Economics, Colorado State University, Fort Collins, CO, USA
| | - Rachel M Maison
- Department of Biomedical Sciences, Colorado State University, Fort Collins, CO, USA
| | - Meredith J Grady
- Human Dimensions of Natural Resources Department, Colorado State University, Fort Collins, CO, USA
| | - Stephanie A Shwiff
- National Wildlife Research Center, United States Department of Agriculture, Animal and Plant Health Inspection Service, Fort Collins, CO, USA
| |
Collapse
|
46
|
Cappai S, Rolesu S, Feliziani F, Desini P, Guberti V, Loi F. Standardized Methodology for Target Surveillance against African Swine Fever. Vaccines (Basel) 2020; 8:vaccines8040723. [PMID: 33276509 PMCID: PMC7761549 DOI: 10.3390/vaccines8040723] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/06/2020] [Revised: 11/26/2020] [Accepted: 11/30/2020] [Indexed: 12/15/2022] Open
Abstract
African swine fever (ASF) remains the most serious pig infectious disease, and its persistence in domestic pigs and wild boar (WB) is a threat for the global industry. The surveillance of WB plays a central role in controlling the disease and rapidly detecting new cases. As we are close to eradicating ASF, the need to find any possible pockets of infection is even more important. In this context, passive surveillance is the method of choice for effective surveillance in WB. Considering the time and economic resources related to passive surveillance, to prioritize these activities, we developed a standardized methodology able to identify areas where WB surveillance should be focused on. Using GIS-technology, we divided a specific Sardinian infected area into 1 km2 grids (a total of 3953 grids). Variables related to WB density, ASF cases during the last three years, sex and age of animals, and the type of land were associated with each grid. Epidemiological models were used to identify the areas with both a lack of information and an high risk of hidden ASFV persistence. The results led to the creation of a graphic tool providing specific indications about areas where surveillance should be a priority.
Collapse
Affiliation(s)
- Stefano Cappai
- OEVR—Sardinian Regional Veterinary Epidemiological Observatory, Istituto Zooprofilattico Sperimentale della Sardegna “G. Pegreffi”, 09125 Cagliari, Italy; (S.C.); (S.R.)
| | - Sandro Rolesu
- OEVR—Sardinian Regional Veterinary Epidemiological Observatory, Istituto Zooprofilattico Sperimentale della Sardegna “G. Pegreffi”, 09125 Cagliari, Italy; (S.C.); (S.R.)
| | - Francesco Feliziani
- Italian Reference Laboratory for Pestivirus and Asfivirus, Istituto Zooprofilattico Sperimentale dell’Umbria e delle Marche “Togo Rosati”, 06126 Perugia, Italy;
| | - Pietro Desini
- ATS Sardegna, ASSL Sassari, Servizio di Sanità Animale, 07100 Sassari, Italy;
| | - Vittorio Guberti
- ISPRA—Institute for Environmental Protection and Research, 00144 Roma, Italy;
| | - Federica Loi
- OEVR—Sardinian Regional Veterinary Epidemiological Observatory, Istituto Zooprofilattico Sperimentale della Sardegna “G. Pegreffi”, 09125 Cagliari, Italy; (S.C.); (S.R.)
- Correspondence: ; Tel.: +39-327-6925-232
| |
Collapse
|
47
|
Renu S, Renukaradhya GJ. Chitosan Nanoparticle Based Mucosal Vaccines Delivered Against Infectious Diseases of Poultry and Pigs. Front Bioeng Biotechnol 2020; 8:558349. [PMID: 33282847 PMCID: PMC7691491 DOI: 10.3389/fbioe.2020.558349] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/02/2020] [Accepted: 10/23/2020] [Indexed: 11/13/2022] Open
Abstract
Infectious disease of poultry and pig are major threat to health and cause severe economic loss to the food industry and a global food safety issue. Poultry and pig act as a mixing vessel of zoonotic transmission of disease to humans. Effective mucosal vaccines used in animals could reduce the impact of diseases in food animals. Chitosan is a biocompatible polymer, and its positive charge makes it a natural mucoadhesive agent. Therefore, since last one-decade chitosan derived nanoparticles (CS NPs) have been in use widely to deliver vaccine antigens in animals through mucosal route. Primary route of entry of most infectious disease pathogen is through oral and nasal routes, and the CS NPs based vaccines delivered through that routes enhance the immunogenicity of encapsulated vaccine antigens by targeting the cargo to mucosal microfold cells, dendritic cells and macrophages. Resulting in induction of robust secretory and systemic antibodies and/or cell mediated immune response which provides protection against infections. To date, CS NPs is being widely used for mucosal vaccine delivery in poultry and pigs to control bacterial and viral infections, and tested in several preclinical trials for vaccine delivery in humans. In this review, we highlighted the progress so far made in using CS NPs as a vehicle for mucosal vaccine delivery against infectious and zoonotic diseases of poultry and pigs. Discussed about the need of CS NPs modifications, CS NPs based vaccines induced immune responses and its role in protection, and challenges in vaccination and future directions.
Collapse
Affiliation(s)
- Sankar Renu
- Food Animal Health Research Program, Ohio Agricultural Research and Development Center, Wooster, OH, United States.,Department of Veterinary Preventive Medicine, College of Veterinary Medicine, The Ohio State University, Columbus, OH, United States
| | - Gourapura J Renukaradhya
- Food Animal Health Research Program, Ohio Agricultural Research and Development Center, Wooster, OH, United States.,Department of Veterinary Preventive Medicine, College of Veterinary Medicine, The Ohio State University, Columbus, OH, United States
| |
Collapse
|
48
|
Vergne T, Andraud M, Bonnet S, De Regge N, Desquesnes M, Fite J, Etore F, Garigliany MM, Jori F, Lempereur L, Le Potier MF, Quillery E, Saegerman C, Vial L, Bouhsira E. Mechanical transmission of African swine fever virus by Stomoxys calcitrans: Insights from a mechanistic model. Transbound Emerg Dis 2020; 68:1541-1549. [PMID: 32910533 DOI: 10.1111/tbed.13824] [Citation(s) in RCA: 9] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/29/2020] [Revised: 08/18/2020] [Accepted: 09/03/2020] [Indexed: 11/30/2022]
Abstract
African swine fever (ASF) represents a global threat with huge economic consequences for the swine industry. Even though direct contact is likely to be the main transmission route from infected to susceptible hosts, recent epidemiological investigations have raised questions regarding the role of haematophagous arthropods, in particular the stable fly (Stomoxys calcitrans). In this study, we developed a mechanistic vector-borne transmission model for ASF virus (ASFV) within an outdoor domestic pig farm in order to assess the relative contribution of stable flies to the spread of the virus. The model was fitted to the ecology of the vector, its blood-feeding behaviour and pig-to-pig transmission dynamic. Model outputs suggested that in a context of low abundance (<5 flies per pig), stable flies would play a minor role in the spread of ASFV, as they are expected to be responsible for around 10% of transmission events. However, with abundances of 20 and 50 stable flies per pig, the vector-borne transmission would likely be responsible for almost 30% and 50% of transmission events, respectively. In these situations, time to reach a pig mortality of 10% would be reduced by around 26% and 40%, respectively. The sensitivity analysis emphasized that the expected relative contribution of stable flies was strongly dependent on the volume of blood they regurgitated and the infectious dose for pigs. This study identified crucial knowledge gaps that need to be filled in order to assess more precisely the potential contribution of stable flies to the spread of ASFV, including a quantitative description of the populations of haematophagous arthropods that could be found in pig farms, a better understanding of blood-feeding behaviours of stable flies and the quantification of the probability that stable flies partially fed with infectious blood transmit the virus to a susceptible pig during a subsequent blood-feeding attempt.
Collapse
Affiliation(s)
- Timothée Vergne
- UMR ENVT-INRAE IHAP, National Veterinary School of Toulouse, France
| | - Mathieu Andraud
- Unité d'Epidémiologie et de Bien-être Animal, Laboratoire de Ploufragan/Plouzané/Niort, Anses, France
| | - Sarah Bonnet
- UMR BIPAR, Animal Health Laboratory, INRAE, ANSES, Ecole Nationale Vétérinaire d'Alfort, Université Paris-Est, Maisons-Alfort Cedex, France
| | - Nick De Regge
- Sciensano, Scientific Direction Infectious Diseases in Animals, Brussels, Belgium
| | - Marc Desquesnes
- InterTryp, University of Montpellier, CIRAD, IRD, Montpellier, France
| | - Johanna Fite
- French Agency for Food, Environmental and Occupational Health & Safety, Maisons-Alfort Cedex, France
| | - Florence Etore
- French Agency for Food, Environmental and Occupational Health & Safety, Maisons-Alfort Cedex, France
| | - Mutien-Marie Garigliany
- Fundamental and Applied Research for Animal and Health (FARAH) Center, University of Liège, Liège
| | - Ferran Jori
- UMR Animal, Santé, Territoires, Risque et Ecosystèmes (ASTRE), CIRAD-INRAE Montpellier, Montpellier, France
| | | | | | - Elsa Quillery
- UMR Animal, Santé, Territoires, Risque et Ecosystèmes (ASTRE), CIRAD-INRAE Montpellier, Montpellier, France
| | - Claude Saegerman
- Fundamental and Applied Research for Animal and Health (FARAH) Center, University of Liège, Liège
| | - Laurence Vial
- UMR Animal, Santé, Territoires, Risque et Ecosystèmes (ASTRE), CIRAD-INRAE Montpellier, Montpellier, France
| | - Emilie Bouhsira
- UMR ENVT-INRAE InTheRes, National Veterinary School of Toulouse, Toulouse, France
| |
Collapse
|
49
|
Mathematical Approach to Estimating the Main Epidemiological Parameters of African Swine Fever in Wild Boar. Vaccines (Basel) 2020; 8:vaccines8030521. [PMID: 32932614 PMCID: PMC7563513 DOI: 10.3390/vaccines8030521] [Citation(s) in RCA: 21] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/31/2020] [Revised: 09/09/2020] [Accepted: 09/10/2020] [Indexed: 12/15/2022] Open
Abstract
African swine fever (ASF) severely threatens the swine industry worldwide, given its spread and the absence of an available licensed vaccine, and has caused severe economic losses. Its persistence in wild boar (WB), longer than in domestic pig farms, and the knowledge gaps in ASF epidemiology hinder ASF virus (ASFV) eradication. Even in areas where disease is effectively controlled and ASFV is no longer detected, declaring eradication is difficult as seropositive WBs may still be detected. The aim of this work was to estimate the main ASF epidemiological parameters specific for the north of Sardinia, Italy. The estimated basic (R0) and effective (Re) reproduction numbers demonstrate that the ASF epidemic is declining and under control with an R0 of 1.139 (95% confidence interval (CI) = 1.123-1.153) and Re of 0.802 (95% CI = 0.612-0.992). In the last phases of an epidemic, these estimates are crucial tools for identifying the intensity of interventions required to definitively eradicate the disease. This approach is useful to understand if and when the detection of residual seropositive WB is no longer associated with any further ASFV circulation.
Collapse
|
50
|
“What a Waste”—Can We Improve Sustainability of Food Animal Production Systems by Recycling Food Waste Streams into Animal Feed in an Era of Health, Climate, and Economic Crises? SUSTAINABILITY 2020. [DOI: 10.3390/su12177071] [Citation(s) in RCA: 25] [Impact Index Per Article: 6.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 02/07/2023]
Abstract
Food waste has been a major barrier to achieving global food security and environmental sustainability for many decades. Unfortunately, food waste has become an even bigger problem in many countries because of supply chain disruptions during the COVID-19 pandemic and African Swine Fever epidemic. Although Japan and South Korea have been leaders in recycling food waste into animal feed, countries that produce much greater amounts of food waste, such as the United States and the European Union, have lagged far behind. Concerns about the risk of transmission of bacteria, prions, parasites, and viruses have been the main obstacles limiting the recycling of food waste streams containing animal-derived tissues into animal feed and have led to government regulations restricting this practice in the U.S. and EU. However, adequate thermal processing is effective for inactivating all biological agents of concern, perhaps except for prions from infected ruminant tissues. The tremendous opportunity for nitrogen and phosphorus resource recovery along with several other environmental benefits from recycling food waste streams and rendered animal by-products into animal feed have not been fully appreciated for their substantial contribution toward solving our climate crisis. It is time to revisit our global approach to improving economic and environmental sustainability by more efficiently utilizing the abundant supply of food waste and animal tissues to a greater extent in animal feed while protecting human and animal health in food animal production systems.
Collapse
|