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Riggio S, Tolone M, Sottile G, Tumino S, Portolano B, Sutera AM, Sardina MT, Cesarani A, Mastrangelo S. A high-density genome-wide approach reveals novel genetic markers linked to small ruminant lentivirus susceptibility in sheep. Front Genet 2024; 15:1376883. [PMID: 38911298 PMCID: PMC11191640 DOI: 10.3389/fgene.2024.1376883] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/26/2024] [Accepted: 05/10/2024] [Indexed: 06/25/2024] Open
Abstract
Visna/Maedi virus (VMV) is lentiviral disease of sheep responsible for severe production losses. Multiple genomic regions associated with infection were reported indicating genetic complexity. In this study, a combined genome-wide approach using a high-density SNP array has been performed, comparing VMV-infected (n = 78) and non-infected (n = 66) individuals of the Valle del Belice breed. The serological tests showed a seroprevalence of 26%. The comparison among results from different approaches (GWAS, Fisher's exact test and the FST analysis) revealed two association signals: on OAR03 close to the GRIN2B gene and on OAR05 close to the TMEM232 gene. To the best of our knowledge, there has been no previous association between these genes and lentiviral infection in any species. The GRIN2B gene plays a role in pain response, synaptic transmission, and receptor clustering, while TMEM232 is involved in the development of immune-related disorders. The results highlighted new aspects of the genetic complexity related to the resistance/susceptibility to VMV in sheep, confirming that studies on different breeds can lead to different results. The ideal approach for validation of the markers identified in our study is to use samples from a population independent from the discovery population with the same phenotype used in the discovery stage.
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Affiliation(s)
- Silvia Riggio
- Dipartimento Scienze Agrarie, Alimentari e Forestali, University of Palermo, Palermo, Italy
| | - Marco Tolone
- Dipartimento di Scienze Chimiche, Biologiche, Farmaceutiche, ed Ambientali, University of Messina, Messina, Italy
| | - Gianluca Sottile
- Dipartimento Scienze Economiche, Aziendali e Statistiche, University of Palermo, Palermo, Italy
| | - Serena Tumino
- Dipartimento di Agricoltura, Alimentazione e Ambiente, University of Catania, Catania, Italy
| | - Baldassare Portolano
- Dipartimento Scienze Agrarie, Alimentari e Forestali, University of Palermo, Palermo, Italy
| | - Anna Maria Sutera
- Dipartimento di Scienze Chimiche, Biologiche, Farmaceutiche, ed Ambientali, University of Messina, Messina, Italy
| | - Maria Teresa Sardina
- Dipartimento Scienze Agrarie, Alimentari e Forestali, University of Palermo, Palermo, Italy
| | - Alberto Cesarani
- Dipartimento di Agraria, University of Sassari, Sassari, Italy
- Department of Animal and Dairy Science, University of Georgia, Athens, GA, United States
| | - Salvatore Mastrangelo
- Dipartimento Scienze Agrarie, Alimentari e Forestali, University of Palermo, Palermo, Italy
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Shi X, Zhang Y, Chen S, Du X, Zhang P, Duan X, Fang H, Liu S. Differential gene expression and immune cell infiltration in maedi-visna virus-infected lung tissues. BMC Genomics 2024; 25:534. [PMID: 38816794 PMCID: PMC11141007 DOI: 10.1186/s12864-024-10448-2] [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: 03/02/2024] [Accepted: 05/23/2024] [Indexed: 06/01/2024] Open
Abstract
BACKGROUND Maedi-visna virus (MVV) is a lentivirus that infects monocyte/macrophage lineage cells in sheep, goats, and wild ruminants and causes pneumonia, mastitis, arthritis, and encephalitis. The immune response to MVV infection is complex, and a complete understanding of its infection and pathogenesis is lacking. This study investigated the in vivo transcriptomic patterns of lung tissues in sheep exposed to MVV using the RNA sequencing technology. RESULT The results indicated that 2,739 genes were significantly differentially expressed, with 1,643 downregulated genes and 1,096 upregulated genes. Many variables that could be unique to MVV infections were discovered. Gene Ontology analysis revealed that a significant proportion of genes was enriched in terms directly related to the immune system and biological responses to viral infections. Kyoto Encyclopedia of Genes and Genomes analysis revealed that the most enriched pathways were related to virus-host cell interactions and inflammatory responses. Numerous immune-related genes, including those encoding several cytokines and interferon regulatory factors, were identified in the protein-protein interaction network of differentially expressed genes (DEGs). The expression of DEGs was evaluated using real-time polymerase chain reaction and western blot analysis. CXCL13, CXCL6, CXCL11, CCR1, CXCL8, CXCL9, CXCL10, TNFSF8, TNFRSF8, IL7R, IFN-γ, CCL2, and MMP9 were upregulated. Immunohistochemical analysis was performed to identify the types of immune cells that infiltrated MVV-infected tissues. B cells, CD4+ and CD8+ T cells, and macrophages were the most prevalent immune cells correlated with MVV infection in the lungs. CONCLUSION Overall, the findings of this study provide a comprehensive understanding of the in vivo host response to MVV infection and offer new perspectives on the gene regulatory networks that underlie pathogenesis in natural hosts.
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Affiliation(s)
- Xiaona Shi
- College of Veterinary Medicine, Inner Mongolia Agricultural University, Zhao Wu Da Road No. 306, Hohhot, 010018, China
- Inner Mongolia Key Laboratory of Basic Veterinary Science, Hohhot, 010018, China
- Key Laboratory of Clinical Diagnosis and Treatment Technology in Animal Disease, Ministry of Agriculture, Hohhot, 010018, China
| | - Yufei Zhang
- College of Veterinary Medicine, Inner Mongolia Agricultural University, Zhao Wu Da Road No. 306, Hohhot, 010018, China
- Inner Mongolia Key Laboratory of Basic Veterinary Science, Hohhot, 010018, China
- Key Laboratory of Clinical Diagnosis and Treatment Technology in Animal Disease, Ministry of Agriculture, Hohhot, 010018, China
| | - Sixu Chen
- College of Veterinary Medicine, Inner Mongolia Agricultural University, Zhao Wu Da Road No. 306, Hohhot, 010018, China
- Inner Mongolia Key Laboratory of Basic Veterinary Science, Hohhot, 010018, China
- Key Laboratory of Clinical Diagnosis and Treatment Technology in Animal Disease, Ministry of Agriculture, Hohhot, 010018, China
| | - Xiaoyue Du
- College of Veterinary Medicine, Inner Mongolia Agricultural University, Zhao Wu Da Road No. 306, Hohhot, 010018, China
- Inner Mongolia Key Laboratory of Basic Veterinary Science, Hohhot, 010018, China
- Key Laboratory of Clinical Diagnosis and Treatment Technology in Animal Disease, Ministry of Agriculture, Hohhot, 010018, China
| | - Pei Zhang
- College of Veterinary Medicine, Inner Mongolia Agricultural University, Zhao Wu Da Road No. 306, Hohhot, 010018, China
- Inner Mongolia Key Laboratory of Basic Veterinary Science, Hohhot, 010018, China
- Key Laboratory of Clinical Diagnosis and Treatment Technology in Animal Disease, Ministry of Agriculture, Hohhot, 010018, China
| | - Xujie Duan
- College of Veterinary Medicine, Inner Mongolia Agricultural University, Zhao Wu Da Road No. 306, Hohhot, 010018, China
- Inner Mongolia Key Laboratory of Basic Veterinary Science, Hohhot, 010018, China
- Key Laboratory of Clinical Diagnosis and Treatment Technology in Animal Disease, Ministry of Agriculture, Hohhot, 010018, China
| | - Hui Fang
- College of Veterinary Medicine, Inner Mongolia Agricultural University, Zhao Wu Da Road No. 306, Hohhot, 010018, China
- Inner Mongolia Key Laboratory of Basic Veterinary Science, Hohhot, 010018, China
- Key Laboratory of Clinical Diagnosis and Treatment Technology in Animal Disease, Ministry of Agriculture, Hohhot, 010018, China
| | - Shuying Liu
- College of Veterinary Medicine, Inner Mongolia Agricultural University, Zhao Wu Da Road No. 306, Hohhot, 010018, China.
- Inner Mongolia Key Laboratory of Basic Veterinary Science, Hohhot, 010018, China.
- Key Laboratory of Clinical Diagnosis and Treatment Technology in Animal Disease, Ministry of Agriculture, Hohhot, 010018, China.
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Kalogianni AI, Bouzalas I, Bossis I, Gelasakis AI. A Longitudinal Cohort Study of Risk Factors Associated with Small Ruminant Lentivirus Seropositivity in Intensively Reared Dairy Ewes in Greece. Pathogens 2023; 12:1200. [PMID: 37887716 PMCID: PMC10609844 DOI: 10.3390/pathogens12101200] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/31/2023] [Revised: 09/22/2023] [Accepted: 09/25/2023] [Indexed: 10/28/2023] Open
Abstract
A two-year longitudinal cohort study was conducted on a total of 407 purebred Chios and Lacaune ewes from four intensive dairy sheep farms to assess potential risk factors for small ruminant lentiviruses (SRLVs) seropositivity. Ewes were serologically tested semiannually at pre-mating and pre-lambing, and their age, breed, and body condition score (BCS) were recorded. Εwes were categorized as constantly seronegative, constantly seropositive, seroconverted, seroreverted, or animals with an intermittent presence of antibodies. Mixed binary logistic regression models were used to estimate the adjusted relative risks of the studied risk factors for (i) the individual ewes' seropositivity, (ii) the manifestation of specific serological patterns, and (iii) the occurrence of seroconversion and seroreversion incidents. Increased age was associated with seropositivity and constantly seropositive status (p < 0.001 in both cases). On the other hand, age was negatively associated with constantly seronegative pattern, seroconversion incident, and the intermittent presence of antibodies (p < 0.05 in all cases). Moreover, breed was recognized as a risk factor: Lacaune ewes demonstrated increased seropositivity, whereas Chios ewes were more likely to demonstrate an intermittent presence of antibodies (p < 0.01 in both cases). Seropositive status (p < 0.001), seropositivity in animals with an intermittent presence of antibodies (p = 0.001), and seroconversion incidents (p < 0.001) were significantly increased at pre-lambing compared to pre-mating. The risk factors recognized in our study contribute to a better understanding of SRLVs epidemiology and the evidence-based designation of SRLVs' control programs in intensive dairy sheep farms in Greece.
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Affiliation(s)
- Aphrodite I Kalogianni
- Department of Animal Science, School of Animal Biosciences, Agricultural University of Athens, 11855 Athens, Greece
| | - Ilias Bouzalas
- Hellenic Agricultural Organization-DEMETER, Veterinary Research Institute, Campus of Thermi, 57001 Thessaloniki, Greece
| | - Ioannis Bossis
- Department of Agricultural Sciences, School of Agriculture, Forestry and Natural Resources, Aristotle University of Thessaloniki, 54124 Thessaloniki, Greece
| | - Athanasios I Gelasakis
- Department of Animal Science, School of Animal Biosciences, Agricultural University of Athens, 11855 Athens, Greece
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Jacob-Ferreira J, Coelho AC, Grau Vila A, Lacasta D, Quintas H. Small Ruminant Lentivirus Infection in Sheep and Goats in North Portugal: Seroprevalence and Risk Factors. Pathogens 2023; 12:829. [PMID: 37375519 DOI: 10.3390/pathogens12060829] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/25/2023] [Revised: 06/07/2023] [Accepted: 06/12/2023] [Indexed: 06/29/2023] Open
Abstract
Small ruminant lentiviruses (SRLVs) are transmitted among ovine and caprine species. This disease is a severe problem for small ruminant production, not only for animals' well-being but also for flocks' efficiency. The main aim of this research was to quantify the seroprevalence and associated risk factors for SRLV infection in the northern region of Portugal. Samples were collected from a total of 150 flocks, of which 129 (86.0%; 95% CI: 80.67%-91.33%) had at least one seropositive animal. Out of 2607 individual blood samples, 1074 (41.2%) were positive for SRLVs. Risk factors associated with SRLV infection were species (caprine), age (>2 years old), flock size (>100 animals), production system (intensive), food production system (milk), type of activity (professional), participation in livestock competitions (yes), replacement young ewe bought (yes), and natural feeding management (yes). This knowledge empowers the implementation of effective preventive measures. Overall, biosecurity measures should be promoted and implemented with the main aim of reducing viral transmission and reducing the prevalence of this disease. We recognise that government authorities should promote and audit voluntary control and eradication programs in small ruminant flocks in the region studied.
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Affiliation(s)
- João Jacob-Ferreira
- Animal and Veterinary Research Centre, University of Trás-os-Montes and Alto Douro (UTAD), 5000-801 Vila Real, Portugal
- Mountain Research Center (CIMO), Polytechnic Institute of Bragança (IPB), Campus de Santa Apolónia, 5300-253 Bragança, Portugal
| | - Ana Cláudia Coelho
- Animal and Veterinary Research Centre, University of Trás-os-Montes and Alto Douro (UTAD), 5000-801 Vila Real, Portugal
| | - Ana Grau Vila
- Servicio de Sanidad Animal, Dirección General de Producción Agropecuaria e Infraestructuras Agrarias, Consejería de Agricultura y Ganadería, Junta de Castilla y León, 47014 Valladolid, Spain
| | - Delia Lacasta
- Animal Pathology Department, Instituto Agroalimentario de Aragón-IA2, Universidad de Zaragoza-CITA, Veterinary Faculty of Zaragoza C/Miguel Servet 177, 50013 Zaragoza, Spain
| | - Hélder Quintas
- Mountain Research Center (CIMO), Polytechnic Institute of Bragança (IPB), Campus de Santa Apolónia, 5300-253 Bragança, Portugal
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Liebler-Tenorio EM, Moog U, Barth S, König P. [Indurative mastitis in a herd of Dorper sheep caused by an infection with Maedi Visna virus]. Tierarztl Prax Ausg G Grosstiere Nutztiere 2023; 51:175-183. [PMID: 37567196 DOI: 10.1055/a-2107-7834] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 08/13/2023]
Abstract
This case report describes indurative mastitis in a herd of sheep caused by Maedi Visna virus (MVV) infection. Reduced udder formation after delivery, small, indurated udders and increased losses of lambs were observed in a herd of Dorper sheep. Examination of the mammary gland and milk did not reveal findings characteristic of chronic bacterial mastitis. The protein supply was insufficient which may have contributed to reduced milk yield, but was considered unlikely as cause for the induration of the mammary gland. Nineteen of the 21 mothers were positive for MVV by serology. Mammary gland and supramammary lymph nodes were collected in a sheep with indurated udder at the time of slaughter. Meat inspection did not reveal lesions in any other organs. One part of the mammary gland showed a mild to moderate multifocal lymphohistiocytic mastitis, the other exhibited a severe diffuse lymphohistiocytic mastitis with atrophy of the glandular acini, vasculopathy, fibrosis and calcification. MVV antigen was visualized by immunohistochemistry in macrophages, dendritic cells, epithelial cells and endothelial cells in the mammary gland, and macrophages and dendritic cells in the supramammary lymph nodes. A large amount of MVV provirus was detected in the supramammary lymph nodes and the severely indurated part of the mammary gland by PCR. In conclusion, indurative mastitis as a result of a systemic infection may occur independently of the commonly known manifestations of Maedi Visna in the lung and central nervous system. MVV should be considered as differential diagnosis in mastitis of sheep. The MVV status of the herd can be tested by serological detection of specific antibodies. Additionally, characteristic histological lesions are present in the mammary gland. MVV antigen can also be detected by immunohistochemistry and MVV provirus by PCR in the altered mammary gland and regional lymph nodes.
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Affiliation(s)
- Elisabeth M Liebler-Tenorio
- Friedrich-Loeffler Institut - Bundesforschungsinstitut für Tiergesundheit (FLI), Institut für Molekulare Pathogenese, Jena
| | - Udo Moog
- Schaf- und Ziegengesundheitsdienst, Thüringer Tierseuchenkasse, Jena
| | - StefanieA Barth
- Friedrich-Loeffler Institut - Bundesforschungsinstitut für Tiergesundheit (FLI), Institut für Molekulare Pathogenese, Jena
| | - Patricia König
- Friedrich-Loeffler Institut - Bundesforschungsinstitut für Tiergesundheit (FLI), Institut für Virusdiagnostik, Greifswald - Insel Riems
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Rodrigues CS, de Faria DA, Lacerda TS, Paiva SR, Caetano AR, Blackburn H, McManus C. Lentivirus Susceptibility in Brazilian and US Sheep with TMEM154 Mutations. Genes (Basel) 2022; 14:genes14010070. [PMID: 36672811 PMCID: PMC9858560 DOI: 10.3390/genes14010070] [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: 11/04/2022] [Revised: 12/13/2022] [Accepted: 12/22/2022] [Indexed: 12/28/2022] Open
Abstract
Small ruminant lentiviruses (SRLVs) affect sheep and goats worldwide. The major gene related to SRLV infections is the Transmembrane Protein Gene 154 (TMEM154). We estimated the haplotype frequencies of TMEM154 in the USA (USDA-ARS) and Brazil (Embrapa) Gene Banks by using two different SNP genotyping methodologies, FluidigmTM and KASPTM. We also genotyped the ZNF389_ss748775100 deletion variant in Brazilian flocks. A total of 1040 blood samples and 112 semen samples from 15 Brazilian breeds were genotyped with Fluidigm for the SNP ZNF389_ss748775100 and 12 TMEM154 SNPs. A total of 484 blood samples from the Santa Inês breed and 188 semen samples from 14 North American sheep breeds were genotyped with KASP for 6 TMEM154 SNPs. All the Brazilian samples had the "I/I" genotype for the ZNF389_ss748775100 mutation. There were 25 TMEM154 haplotypes distributed across the Brazilian breeds, and 4 haplotypes in the US breeds. Haplotypes associated with susceptibility were present in almost all breeds, which suggests that genetic testing can help to improve herd health and productivity by selecting non-susceptible animals as founders of the next generations. Fluidigm and KASP are reliable assays when compared with Beadchip arrays. Further studies are necessary to understand the unknown role of TMEM154 mutations, host-pathogen interaction and new genes associated with the clinical condition.
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Affiliation(s)
- Camila Souza Rodrigues
- Faculdade de Agronomia e Medicina Veterinária, Instituto Central de Ciências, Campus Darcy Ribeiro, Universidade de Brasília, Asa Norte, Brasilia 70910-900, DF, Brazil
| | - Danielle Assis de Faria
- Faculdade de Agronomia e Medicina Veterinária, Instituto Central de Ciências, Campus Darcy Ribeiro, Universidade de Brasília, Asa Norte, Brasilia 70910-900, DF, Brazil
| | - Thaísa Sant’Anna Lacerda
- Faculdade de Agronomia e Medicina Veterinária, Instituto Central de Ciências, Campus Darcy Ribeiro, Universidade de Brasília, Asa Norte, Brasilia 70910-900, DF, Brazil
| | - Samuel Rezende Paiva
- Embrapa Recursos Genéticos e Biotecnologia, Final W5 Norte, Brasilia 70770-917, DF, Brazil
- Correspondence:
| | | | - Harvey Blackburn
- USDA-ARS—Agricultural Genetic Resources Preservation Research, 1111 South Mason Street, Fort Collins, CO 805214500, USA
| | - Concepta McManus
- Departamento de Ciências Fisiológicas, Instituto de Biologia, Campus Darcy Ribeiro, Universidade de Brasilia, Asa Norte, Brasilia 70910-900, DF, Brazil
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Moretti R, Sartore S, Colitti B, Profiti M, Chessa S, Rosati S, Sacchi P. Susceptibility of different TMEM154 genotypes in three Italian sheep breeds infected by different SRLV genotypes. Vet Res 2022; 53:60. [PMID: 35906709 PMCID: PMC9335956 DOI: 10.1186/s13567-022-01079-0] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/22/2022] [Accepted: 05/11/2022] [Indexed: 11/25/2022] Open
Abstract
Small ruminant lentiviruses (SRLV) belong to the Retroviridae family and can cause various diseases. One of the most impacting diseases is visna-maedi, a complex disease characterized by long latencies and chronic progressive inflammatory events affecting the nervous system, lungs, mammary gland, and articular joints. A single nucleotide polymorphism (rs408593969, c.103G>A, missense mutation E35K) in the ovine transmembrane protein gene 154 (TMEM154) was identified as protective against small ruminant lentivirus infection in different herds worldwide. However, there is evidence in the scientific literature of a breed-specificity of this protective effect and, furthermore, there are still limited studies regarding the association between the animal genotype and the infecting virus genotype. Thus, the aim of this study was to further investigate the association between the animal genotype for the suggested protective mutation and the infecting virus genotype, in three different sheep breeds reared in northern Italy. The results obtained only partially confirmed the data available in the literature, as the protective effect was confirmed only for SRLV genotype A clusters, while other genotypes (namely B and E) infected AA and GA animals. Further studies with an experimental infection of specific virus genotypes in hosts with specific genotypes are required to confirm the larger number of cases the results obtained in this study.
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Affiliation(s)
- Riccardo Moretti
- Dipartimento di Scienze Veterinarie, Università di Torino, 10095, Grugliasco, TO, Italy
| | - Stefano Sartore
- Dipartimento di Scienze Veterinarie, Università di Torino, 10095, Grugliasco, TO, Italy
| | - Barbara Colitti
- Dipartimento di Scienze Veterinarie, Università di Torino, 10095, Grugliasco, TO, Italy
| | - Margherita Profiti
- Dipartimento di Scienze Veterinarie, Università di Torino, 10095, Grugliasco, TO, Italy
| | - Stefania Chessa
- Dipartimento di Scienze Veterinarie, Università di Torino, 10095, Grugliasco, TO, Italy.
| | - Sergio Rosati
- Dipartimento di Scienze Veterinarie, Università di Torino, 10095, Grugliasco, TO, Italy
| | - Paola Sacchi
- Dipartimento di Scienze Veterinarie, Università di Torino, 10095, Grugliasco, TO, Italy
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Kalogianni AI, Stavropoulos I, Chaintoutis SC, Bossis I, Gelasakis AI. Serological, Molecular and Culture-Based Diagnosis of Lentiviral Infections in Small Ruminants. Viruses 2021; 13:1711. [PMID: 34578292 PMCID: PMC8473411 DOI: 10.3390/v13091711] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/30/2021] [Revised: 08/22/2021] [Accepted: 08/25/2021] [Indexed: 02/01/2023] Open
Abstract
Small ruminant lentiviruses (SRLVs) infections lead to chronic diseases and remarkable economic losses undermining health and welfare of animals and the sustainability of farms. Early and definite diagnosis of SRLVs infections is the cornerstone for any control and eradication efforts; however, a "gold standard" test and/or diagnostic protocols with extensive applicability have yet to be developed. The main challenges preventing the development of a universally accepted diagnostic tool with sufficient sensitivity, specificity, and accuracy to be integrated in SRLVs control programs are the genetic variability of SRLVs associated with mutations, recombination, and cross-species transmission and the peculiarities of small ruminants' humoral immune response regarding late seroconversion, as well as intermittent and epitope-specific antibody production. The objectives of this review paper were to summarize the available serological and molecular assays for the diagnosis of SRLVs, to highlight their diagnostic performance emphasizing on advantages and drawbacks of their application, and to discuss current and future perspectives, challenges, limitations and impacts regarding the development of reliable and efficient tools for the diagnosis of SRLVs infections.
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Affiliation(s)
- Aphrodite I. Kalogianni
- Laboratory of Anatomy and Physiology of Farm Animals, Department of Animal Science, School of Animal Biosciences, Agricultural University of Athens (AUA), Iera Odos 75 Str., 11855 Athens, Greece
| | - Ioannis Stavropoulos
- Laboratory of Animal Husbandry, Department of Agricultural Sciences, School of Agriculture, Forestry and Natural Resources, Aristotle University of Thessaloniki (AUTh), 54124 Thessaloniki, Greece; (Ι.S.); (I.B.)
| | - Serafeim C. Chaintoutis
- Diagnostic Laboratory, School of Veterinary Medicine, Faculty of Health Sciences, Aristotle University of Thessaloniki (AUTh), 11 Stavrou Voutyra Str., 54627 Thessaloniki, Greece;
| | - Ioannis Bossis
- Laboratory of Animal Husbandry, Department of Agricultural Sciences, School of Agriculture, Forestry and Natural Resources, Aristotle University of Thessaloniki (AUTh), 54124 Thessaloniki, Greece; (Ι.S.); (I.B.)
| | - Athanasios I. Gelasakis
- Laboratory of Anatomy and Physiology of Farm Animals, Department of Animal Science, School of Animal Biosciences, Agricultural University of Athens (AUA), Iera Odos 75 Str., 11855 Athens, Greece
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A novel 2 bp deletion variant in Ovine-DRB1 gene is associated with increased Visna/maedi susceptibility in Turkish sheep. Sci Rep 2021; 11:14435. [PMID: 34262107 PMCID: PMC8280167 DOI: 10.1038/s41598-021-93864-8] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/02/2021] [Accepted: 07/01/2021] [Indexed: 12/15/2022] Open
Abstract
Visna/maedi (VM) is a multisystemic lentivirus infection of sheep that affecting sheep industry across the globe. TMEM154 gene has been identified to be a major VM-associated host gene, nevertheless, a recent study showed that the frequency of the VM-resistant TMEM154 haplotypes was very low or absent in indigenous sheep. Thus, the present study was designed to determine other possible co-receptors associated with VM. For this purpose, DRB1 gene, which is renowned for its role in host immune response against various diseases was targeted. A total number of 151 case–control matched pairs were constructed from 2266 serologically tested sheep. A broad range of DRB1 haplotype diversity was detected by sequence-based genotyping. Moreover, a novel 2 bp deletion (del) in the DRB1 intron 1 was identified. For the final statistic, the sheep carrying VM-resistant TMEM154 diplotypes were removed and a McNemar’s test with a matched pairs experimental design was conducted. Consequently, it was identified for the first time that the 2 bp del variant is a genetic risk factor for VM (p value 0.002; chi-square 8.31; odds ratio 2.9; statistical power 0.90) in the dominant model. Thus, negative selection for 2 bp del variant could decrease VM infection risk in Turkish sheep.
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Caprine Arthritis Encephalitis Virus Is Associated with Renal Lesions. Viruses 2021; 13:v13061051. [PMID: 34206110 PMCID: PMC8230173 DOI: 10.3390/v13061051] [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: 04/27/2021] [Revised: 05/27/2021] [Accepted: 05/29/2021] [Indexed: 11/16/2022] Open
Abstract
Caprine arthritis encephalitis virus (CAEV) is a monocyte/macrophage-tropic lentivirus that primarily infects goats resulting in a well-recognized set of chronic inflammatory syndromes focused on the joint synovium, tissues of the central nervous system, pulmonary interstitium and mammary gland. Clinically affected animals generally manifest with one or more of these classic CAEV-associated tissue lesions; however, CAEV-associated renal inflammation in goats has not been reported in the peer-reviewed literature. Here we describe six goats with chronic, multisystemic CAEV infections in conjunction with CAEV-associated renal lesions. One of the animals had CAEV antigen-associated thrombotic arteritis resulting in infarction of both the kidney and heart. These goats had microscopic evidence of inflammatory renal injury (interstitial nephritis) with detectable renal immunolabeling for CAEV antigen in three of six animals and amplifiable proviral sequences consistent with CAEV in all six animals. Cardiac lesions (vascular, myocardial or endocardial) were also identified in four of six animals. Within the viral promoter (U3) region, known transcription factor binding sites (TFBSs) were generally conserved, although one viral isolate had a duplication of the U3 A region encoding a second gamma-activated site (GAS). Despite the TFBS conservation, the isolates demonstrated a degree of phylogenetic diversity. At present, the clinical consequence of CAEV-associated renal injury is not clear.
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11
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Ovine Progressive Pneumonia: Diagnosis and Seroprevalence in the South of Sonora, Mexico. Case Rep Vet Med 2021; 2021:6623888. [PMID: 33628573 PMCID: PMC7880706 DOI: 10.1155/2021/6623888] [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: 10/21/2020] [Revised: 01/25/2021] [Accepted: 01/30/2021] [Indexed: 11/25/2022] Open
Abstract
Ovine progressive pneumonia (OPP) is the most severe presentation of small ruminant lentivirus (SRLV) infection known as Maedi-Visna. Serological evidence in Mexico of the presence of this lentivirus was published in 1986. After that, studies revealed that SRLVs have a broad distribution in Mexico by detecting antibodies or/and molecular tests; however, a descriptive case of the disease has not been published. This work's objective was to describe the diagnosis of a case of OPP through lesion description, serology, and molecular test. The histopathological study showed that lymph follicular hyperplasia, interstitial pneumonia, and smooth muscle hyperplasia were presented. The serological test demonstrated specific antibodies against the Maedi-Visna virus, and PCR analysis demonstrated a positive outcome. These results include the criteria for the diagnosis of OPP. The serological prevalence of this disease is presented, contributing to the knowledge of the ecology of this disease in the world. This work is the first case report of ovine progressive pneumonia in Mexico and evidence of seroprevalence in sheep herds from Sonora, Mexico.
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Olech M, Kuźmak J. Molecular Characterization of Small Ruminant Lentiviruses of Subtype A5 Detected in Naturally Infected but Clinically Healthy Goats of Carpathian Breed. Pathogens 2020; 9:pathogens9120992. [PMID: 33256245 PMCID: PMC7761454 DOI: 10.3390/pathogens9120992] [Citation(s) in RCA: 12] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/30/2020] [Revised: 11/24/2020] [Accepted: 11/24/2020] [Indexed: 11/18/2022] Open
Abstract
Small ruminant lentiviruses (SRLVs) are widespread in sheep and goats in Poland, and several subtypes were identified and molecularly characterized up to date. This is the first study that characterizes the molecular properties of A5 strains of SRLV detected in naturally infected, but clinically healthy, Carpathian goats. Segments from three genomic regions (gag, env, and LTR) were analyzed. Genetic distance, pairwise comparison, and phylogenetic analysis revealed that Polish SRLV A5 sequences are closely related to the Swiss and German A5 sequences suggesting a common origin. The epidemiological linkage was identified particularly between the small ruminants of Germany and Poland. Amino acid sequences of immunodominant regions in CA protein were well-conserved within analyzed strains; however, they showed some remarkable changes like substitution (D) to (E), at position 90 in Major Homology Region (MHR) and (T) to (S), at position 141 in epitope 3. In contrast, aa sequences of surface glycoprotein exhibited the highest variability confirming type-specific variation in SU5 epitope. Two deletions in the U3 region of A5 strains were noted: One (8 nt) located near the 5′ end of the U3 region and the other (29 nt) located in the central region of U3. Additionally, all A5 strains had specific deletion (10 nt) in the R region. Furthermore, we did not find a correlation between copies of the CAAAT motif and clinical manifestation in infected animals. These data showed some remarkable features in the viral genome of A5 strains, which may be related to the attenuated phenotype in vivo, characterized by the lack of any clinical signs in infected goats. Certainly, more studies are required to support the hypothesis that these A5 viruses are of low pathogenicity for goats. We want to focus our future studies on the analysis of the whole genomes of these isolates and their biological properties, as well as on clinicopathological studies of goats infected by A5 SRLV, aiming to clarify the pathogenic potential of these viruses.
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Affiliation(s)
- Monika Olech
- Correspondence: ; Tel.: +(48)-8188-9300; Fax: +(48)-8188-62595
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Pazzola M, Puggioni G, Ponti MN, Scivoli R, Dettori ML, Cecchinato A, Vacca GM. Test positivity for Maedi-Visna virus and Mycobacterium avium ssp. paratuberculosis in Sarda ewes: Effects on milk composition and coagulation traits and heritability estimates for susceptibility. J Dairy Sci 2020; 103:9213-9223. [PMID: 32828507 DOI: 10.3168/jds.2019-18026] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/09/2019] [Accepted: 06/02/2020] [Indexed: 01/01/2023]
Abstract
Maedi-Visna virus (MVV) and Mycobacterium avium ssp. paratuberculosis (MAP) are two pathogens that cause chronic, production-limiting diseases in dairy sheep. Although they are present worldwide, there are no detailed reports on their actual effects on milk traits in the literature. This study was designed to investigate the effects of test positivity to MVV and MAP on ovine milk yield, composition and coagulation properties, and curd-firming over time (CFt) variables in clinically healthy animals at the field level. The additive genetic variation and heritabilities of MVV and MAP positivity were also estimated. Milk samples were collected from 1,079 Sarda sheep kept on 23 farms, and pedigree information was obtained from the flock book. Milk yield was also recorded on the sampling date. Positivity for MVV and MAP was determined from milk samples using indirect ELISA test kits. Milk composition traits were measured by spectroscopy, milk coagulation properties were measured with a Formagraph (Foss Italia, Padua, Italy), and CFt traits were calculated using the data from the Formagraph diagram. The effects of MVV and MAP positivity on milk traits were determined through a set of mixed linear models, which took into account various sources of variation, such as days in milk, parity, and flock effects, and included the effects (positive or negative) of the 2 pathogens. A Bayesian threshold sire model with sire relationship was used to estimate genetic variation and heritability. The overall animal prevalence of MVV-positive ewes was 43.6%; on only 1 farm of the 23 tested were all sampled ewes negative. An overall animal prevalence of 10.6% was recorded for MAP, with 4 farms at 0%. Positivity for MVV significantly affected the logarithmic score of the bacterial count, curd firmness after 30 min and 45 min, and the curd-firming instant rate constant. We found significant effects of MAP infection on milk composition, pH, and rennet coagulation time. The mean of the posterior distributions of heritability estimates on the liability scale was 0.15 for MAP and 0.07 for MVV. Our results demonstrate that only a few traits are negatively affected by MVV and MAP positivity, and that there is exploitable genetic variation in MVV and MAP susceptibility in dairy sheep.
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Affiliation(s)
- Michele Pazzola
- Department of Veterinary Medicine, University of Sassari, via Vienna 2, 07100 Sassari, Italy.
| | - Giantonella Puggioni
- Istituto Zooprofilattico Sperimentale della Sardegna "G. Pegreffi," Via Vienna 2, 07100 Sassari, Italy
| | - Maria N Ponti
- Istituto Zooprofilattico Sperimentale della Sardegna "G. Pegreffi," Via Vienna 2, 07100 Sassari, Italy
| | - Rosario Scivoli
- Istituto Zooprofilattico Sperimentale della Sardegna "G. Pegreffi," Via Vienna 2, 07100 Sassari, Italy
| | - Maria L Dettori
- Department of Veterinary Medicine, University of Sassari, via Vienna 2, 07100 Sassari, Italy
| | - Alessio Cecchinato
- Department of Agronomy, Food, Natural resources, Animals and Environment (DAFNAE), University of Padova, viale dell'Università 16, 35020 Legnaro (PD), Italy
| | - Giuseppe M Vacca
- Department of Veterinary Medicine, University of Sassari, via Vienna 2, 07100 Sassari, Italy
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Echeverría I, De Miguel R, De Pablo-Maiso L, Glaria I, Benito AA, De Blas I, De Andrés D, Luján L, Reina R. Multi-Platform Detection of Small Ruminant Lentivirus Antibodies and Provirus as Biomarkers of Production Losses. Front Vet Sci 2020; 7:182. [PMID: 32426375 PMCID: PMC7204384 DOI: 10.3389/fvets.2020.00182] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/09/2020] [Accepted: 03/20/2020] [Indexed: 11/29/2022] Open
Abstract
Small ruminant lentiviruses (SRLVs) are endemic in most areas of Europe, causing a chronic infection and a multisystemic disease affecting the udder, carpal joints, lungs, and central nervous system. Due to the lack of treatments and protective vaccination strategies, infection control is focused on the identification of infected animals through serological or molecular techniques. However, antigenic and genetic heterogeneity of SRLVs represent a clear drawback for diagnosis. Infected animals may present lower animal production parameters such as birth weight or milk production and quality, depending on productive systems considered and, likely, to the diagnostic method applied. In this study, four sheep flocks dedicated to dairy or meat production were evaluated using three different ELISA and two PCR strategies to classify animal population according to SRLV infection status. Productive parameters were recorded along one whole lactation or reproductive period and compared between positive and negative animals. SRLV was present in 19% of the total population, being unequally distributed in the different flocks. Less than half of the infected animals were detected by a single diagnostic method, highlighting the importance of combining different diagnostic techniques. Statistical analysis employing animal classification using all the diagnostic methods associated lambing size, lamb weight at birth, and daily weight gain with SRLV infection status in meat flocks. Milk production, somatic cell count, fat, and protein content in the milk were associated with SRLV infection in dairy flocks, to a greater extent in the flock showing higher seroprevalence. A multi-platform SRLV diagnostic strategy was useful for ensuring correct animal classification, thus validating downstream studies investigating production traits.
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Affiliation(s)
- Irache Echeverría
- Animal Health Department, Institute of Agrobiotechnology, CSIC-Government of Navarra, Mutilva, Spain
| | - Ricardo De Miguel
- Department of Animal Pathology, Instituto Universitario de Investigación Mixto Agroalimentario de Aragón (IA2), University of Zaragoza, Zaragoza, Spain
| | - Lorena De Pablo-Maiso
- Animal Health Department, Institute of Agrobiotechnology, CSIC-Government of Navarra, Mutilva, Spain
| | - Idoia Glaria
- Animal Health Department, Institute of Agrobiotechnology, CSIC-Government of Navarra, Mutilva, Spain
| | - Alfredo A Benito
- Molecular and Cell Biology Department, EXOPOL SL, Zaragoza, Spain
| | - Ignacio De Blas
- Department of Animal Pathology, Instituto Universitario de Investigación Mixto Agroalimentario de Aragón (IA2), University of Zaragoza, Zaragoza, Spain
| | - Damián De Andrés
- Animal Health Department, Institute of Agrobiotechnology, CSIC-Government of Navarra, Mutilva, Spain
| | - Lluís Luján
- Department of Animal Pathology, Instituto Universitario de Investigación Mixto Agroalimentario de Aragón (IA2), University of Zaragoza, Zaragoza, Spain
| | - Ramsés Reina
- Animal Health Department, Institute of Agrobiotechnology, CSIC-Government of Navarra, Mutilva, Spain
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15
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Lacasta D, González J, Navarro T, Saura F, Acín C, Vasileiou N. Significance of respiratory diseases in the health management of sheep. Small Rumin Res 2019. [DOI: 10.1016/j.smallrumres.2019.03.004] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
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16
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Yaman Y, Keleş M, Aymaz R, Sevim S, Sezenler T, Önaldı AT, Kaptan C, Başkurt A, Koncagül S, Öner Y, Öztürk EE, İriadam M, Ün C, Heaton MP. Association of TMEM154 variants with visna/maedi virus infection in Turkish sheep. Small Rumin Res 2019. [DOI: 10.1016/j.smallrumres.2019.06.006] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/26/2022]
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17
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Gayo E, Polledo L, Magalde A, Balseiro A, García Iglesias MJ, Pérez Martínez C, Preziuso S, Rossi G, García Marín JF. Characterization of minimal lesions related to the presence of visna/maedi virus in the mammary gland and milk of dairy sheep. BMC Vet Res 2019; 15:109. [PMID: 30967151 PMCID: PMC6456970 DOI: 10.1186/s12917-019-1855-3] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/28/2018] [Accepted: 03/27/2019] [Indexed: 11/30/2022] Open
Abstract
Background In order to characterize the complete range of lesions, especially minimal, affecting mammary gland and viral antigen distribution and target cells using immunohistochemistry in naturally Visna/maedi (VM) 84 infected sheep were studied, forty-four from flocks with clinical cases (A) and 35 randomly sampled from two abattoirs (B) together with five negative controls (C). An immunocytochemistry technique was developed and further milk samples (n = 39) were used to study viral excretion, carrier cells and the role of milk and colostrum in the transmission of the disease. Results All sheep from group C and three sheep from group B were negative to VM in tissue sections by histopathology, immunohistochemistry and PCR, and also in serum using ELISA. Several degrees of CD3 + lymphocytic interstitial mastitis were observed in groups A and B: minimal (+) n = 26 sheep; moderate (++), n = 32 and severe (+++), n = 12. No differences in lesion distribution were observed between groups A and B. Viral presence was confirmed by immunohistochemistry using two different antibodies and/or PCR in every tissue with lesions while serology was negative in six sheep with lesions. Two milk samples taken from milk tanks from two flocks from group A and fourteen milk samples from 29 infected sheep from group B were positive to VM (most of them from animals with moderate and severe lesions). Positivity was only found in macrophages, even in focal and minimal lesions, while no positivity was observed in epithelial or any other cells in either tissue and milk samples. Conclusions This new observation of the minimal lesions described in this work increased the prevalence of VM lesions in mammary gland up to 90.9% and VM should be considered as a differential diagnosis when minimal interstitial lesions are detected. A high prevalence of VM was observed in intensive milk-producing sheep, ELISA serology did not detect as positivity all infected animals, while histology, IHC or PCR showed higher sensitivity. The cytological technique developed was very useful in milk-cell studies using hematoxylin and eosin and immunocytochemistry. Viral detection in milk samples (16/39) confirms a potential but limited role of milk/colostrum in viral transmission. Electronic supplementary material The online version of this article (10.1186/s12917-019-1855-3) contains supplementary material, which is available to authorized users.
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Affiliation(s)
- E Gayo
- Veterinary Pathology Unit, School of Veterinary Medicine, University of León, León, Spain.
| | | | - A Magalde
- Veterinary Pathology Unit, School of Veterinary Medicine, University of León, León, Spain
| | | | - M J García Iglesias
- Veterinary Pathology Unit, School of Veterinary Medicine, University of León, León, Spain
| | - C Pérez Martínez
- Veterinary Pathology Unit, School of Veterinary Medicine, University of León, León, Spain
| | - S Preziuso
- School of Bioscences and Veterinary Medicine, University of Camerino, Camerino, Italy
| | - G Rossi
- School of Bioscences and Veterinary Medicine, University of Camerino, Camerino, Italy
| | - J F García Marín
- Veterinary Pathology Unit, School of Veterinary Medicine, University of León, León, Spain
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18
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Gayo E, Cuteri V, Polledo L, Rossi G, García Marín JF, Preziuso S. Genetic Characterization and Phylogenetic Analysis of Small Ruminant Lentiviruses Detected in Spanish Assaf Sheep with Different Mammary Lesions. Viruses 2018; 10:v10060315. [PMID: 29890760 PMCID: PMC6024768 DOI: 10.3390/v10060315] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/07/2018] [Revised: 05/30/2018] [Accepted: 06/07/2018] [Indexed: 11/16/2022] Open
Abstract
Small Ruminant Lentiviruses (SRLVs) are widespread in many countries and cause economically relevant, slow, and persistent diseases in sheep and goats. Monitoring the genetic diversity of SRLVs is useful to improve the diagnostic tools used in the eradication programs. In this study, SRLVs detected in Spanish Assaf sheep with different grades of lymphoproliferative mastitis were sequenced. Genetic characterization showed that most samples belonged to type A and were closer to Spanish SRLV isolates previously classified as A2/A3. Four samples belonged to subtype B2 and showed higher homology with Italian B2 strains than with Spanish B2 isolates. Amino acid sequences of immuno-dominant epitopes in the gag region were very conserved while more alterations were found in the LTR sequences. No significant correlations were found between grades of mastitis and alterations in the sequences although samples with similar histological features were phylogenetically closer to each other. Broader genetic characterization surveys in samples with different grades of SRLV-lesions are required for evaluating potential correlations between SRLV sequences and the severity of diseases.
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Affiliation(s)
- Elena Gayo
- Pathological Anatomy Section, Animal Health Department, School of Veterinary Medicine, University of Leon, via Profesor Pedro Carmenes s/n Campus de Vegazana, 24071 León, Spain.
| | - Vincenzo Cuteri
- School of Biosciences and Veterinary Medicine, University of Camerino, Via Circonvallazione 93/95, 62024 Matelica (MC), Italy.
| | - Laura Polledo
- Micros Veterinaria, INDEGSAL, via Profesor Pedro Carmenes s/n Campus de Vegazana, 24071 León, Spain.
| | - Giacomo Rossi
- School of Biosciences and Veterinary Medicine, University of Camerino, Via Circonvallazione 93/95, 62024 Matelica (MC), Italy.
| | - Juan F García Marín
- Pathological Anatomy Section, Animal Health Department, School of Veterinary Medicine, University of Leon, via Profesor Pedro Carmenes s/n Campus de Vegazana, 24071 León, Spain.
| | - Silvia Preziuso
- School of Biosciences and Veterinary Medicine, University of Camerino, Via Circonvallazione 93/95, 62024 Matelica (MC), Italy.
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19
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Gayo E, Polledo L, Balseiro A, Martínez CP, García Iglesias MJ, Preziuso S, Rossi G, García Marín JF. Inflammatory Lesion Patterns in Target Organs of Visna/Maedi in Sheep and their Significance in the Pathogenesis and Diagnosis of the Infection. J Comp Pathol 2018; 159:49-56. [PMID: 29599005 DOI: 10.1016/j.jcpa.2018.01.001] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/14/2017] [Revised: 01/05/2018] [Accepted: 01/10/2018] [Indexed: 11/27/2022]
Abstract
Ovine visna/maedi (VM) infection is characterized by the development of chronic inflammatory lesions in different organs, mainly in the lung, mammary gland and central nervous system (CNS), with either histiocytic or lymphocytic pattern predominance being described in the CNS. To help to understand the role of host immune response in the development of these patterns, 50 naturally-infected sheep and eight non-infected sheep from intensive milk-producing flocks were studied. The histological lesion patterns in the three main target organs in each sheep were characterized. Lesion severity was determined, including minimal lesions. A histiocytic pattern was observed in 23 sheep (46%), a lymphocytic inflammatory pattern in 19 sheep (38%) and a mixed inflammatory pattern in eight sheep (16%). Forty animals showed moderate or severe lesions (80%), while 10 had minimal lesions (20%). Moderate or severe lesions affected only one target organ in 20 sheep (50%), two organs in 14 sheep (35%) and all three target organs in six sheep (15%). Infection was confirmed by immunohistochemistry (IHC) using an antibody specific for p28 of VM virus/caprine arthritis and encephalitis virus and by polymerase chain reaction (PCR) in all sheep. Minimal inflammatory lesions associated with positive IHC and PCR were observed. The results suggest that the development of a predominant inflammatory pattern in different organs within the same animal may be related to the host immune response. Minimal and focal lesions, not considered previously, should be taken into account when formulating a differential diagnosis in affected sheep.
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Affiliation(s)
- E Gayo
- Pathological Anatomy Section, Animal Health Department, School of Veterinary Medicine, University of León, Spain.
| | | | | | - C Pérez Martínez
- Pathological Anatomy Section, Animal Health Department, School of Veterinary Medicine, University of León, Spain
| | - M J García Iglesias
- Pathological Anatomy Section, Animal Health Department, School of Veterinary Medicine, University of León, Spain
| | - S Preziuso
- SERIDA, Gijón, Spain; School of Biosciences and Veterinary Medicine, University of Camerino, Italy
| | - G Rossi
- SERIDA, Gijón, Spain; School of Biosciences and Veterinary Medicine, University of Camerino, Italy
| | - J F García Marín
- Pathological Anatomy Section, Animal Health Department, School of Veterinary Medicine, University of León, Spain
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20
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Azevedo DAAD, Santos VWSD, Sousa ALMD, Peixoto RM, Pinheiro RR, Andrioli A, Teixeira MFDS. Small ruminant lentiviruses: economic and productive losses, consequences of the disease. ARQUIVOS DO INSTITUTO BIOLÓGICO 2018. [DOI: 10.1590/1808-1657000552016] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022] Open
Abstract
ABSTRACT: Small ruminant lentiviruses, caprine arthritis encephalitis virus, and Maedi-Visna virus cause diseases that result in significant productive losses, mostly in dairy animals. These viruses belong to the Retroviridae family, Lentivirus genus, and constitute a heterogeneous group, which may generate implications for the diagnosis and control of small ruminant lentiviruses. Losses caused by them are associated with reproductive failure, short productive life, and decreased milk production by the infected animals. In addition, these viruses may reduce milk quality, affecting the production of dairy products such as cheese. Small ruminant lentiviruses lead to indirect losses, decreasing herd value and forcing the development of epidemiological trade barriers for animal germplasm. Control of small ruminant lentiviruses is important to promote optimal milk production and to reduce costs with medicine and technical assistance. This control may vary in caprine and ovine populations of each country, according to seroprevalence, variety of breeds, and peculiarities of the practiced management.
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21
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Gayo E, Polledo L, Preziuso S, Rossi G, Balseiro A, Pérez Martínez C, García Iglesias M, García Marín J. Serological ELISA results are conditioned by individual immune response in ovine maedi visna. Small Rumin Res 2017. [DOI: 10.1016/j.smallrumres.2017.10.008] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
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22
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Pinczowski P, Sanjosé L, Gimeno M, Crespo H, Glaria I, Amorena B, de Andrés D, Pérez M, Reina R, Luján L. Small Ruminant Lentiviruses in Sheep: Pathology and Tropism of 2 Strains Using the Bone Marrow Route. Vet Pathol 2017; 54:413-424. [PMID: 28113037 DOI: 10.1177/0300985816688742] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
Abstract
The objective of this work was to comparatively study the tissue tropism and the associated pathology of 2 autochthonous small ruminant lentivirus (SRLV) field strains using an experimental infection in sheep through the bone marrow. Fifteen male, SRLV-free lambs of the Rasa Aragonesa breed were inoculated with strain 697 (nervous tissue origin, animals A1-A6), with strain 496 (articular origin, animals B1-B6), or with uninfected culture medium (C1-C3). Clinical, serologic, and polymerase chain reaction (PCR) evaluations were performed periodically. Two lambs from each infected group and a control animal were euthanized at 134, 273, and 319 days postinfection. Tissues were analyzed by gross and histopathologic evaluation; immunohistochemistry for CD3, CD4, CD8, CD68, and FoxP3 cell markers; lung morphometric evaluation; and tissue proviral quantification by PCR. All infected animals became positive either by enzyme-linked immunosorbent assay and/or PCR, with group B lambs showing the highest serologic values and more consistently positive PCR reactions. Group A lambs showed representative lung lesions but only mild histopathologic changes in the central nervous system (CNS) or in carpal joints. Contrarily, group B lambs demonstrated intense carpal arthritis and interstitial pneumonia but an absence of lesions in the CNS. Proviral copies in tissues were detected only in group B lambs. Experimental infection with these SRLV strains indicates that strain 496 is more virulent than strain 697 and more prone to induce arthritis, whereas strain 697 is more likely to reproduce encephalitis in Rasa Aragonesa lambs. Host factors as well as viral factors are responsible for the final clinicopathologic picture during SRLV infections.
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Affiliation(s)
- P Pinczowski
- 1 Department of Animal Pathology, University of Zaragoza, Spain
| | - L Sanjosé
- 2 Institute of Agrobiotechnology, CSIC-Public University of Navarra, Pamplona, Navarra, Spain
| | - M Gimeno
- 1 Department of Animal Pathology, University of Zaragoza, Spain
| | - H Crespo
- 2 Institute of Agrobiotechnology, CSIC-Public University of Navarra, Pamplona, Navarra, Spain
| | - I Glaria
- 2 Institute of Agrobiotechnology, CSIC-Public University of Navarra, Pamplona, Navarra, Spain
| | - B Amorena
- 2 Institute of Agrobiotechnology, CSIC-Public University of Navarra, Pamplona, Navarra, Spain
| | - D de Andrés
- 2 Institute of Agrobiotechnology, CSIC-Public University of Navarra, Pamplona, Navarra, Spain
| | - M Pérez
- 3 Department of Animal Anatomy, Embryology and Genetics, University of Zaragoza, Spain
| | - R Reina
- 2 Institute of Agrobiotechnology, CSIC-Public University of Navarra, Pamplona, Navarra, Spain
| | - L Luján
- 1 Department of Animal Pathology, University of Zaragoza, Spain
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Gavojdian D, Budai C, Cziszter LT, Csizmar N, Javor A, Kusza S. Reproduction Efficiency and Health Traits in Dorper, White Dorper, and Tsigai Sheep Breeds under Temperate European Conditions. ASIAN-AUSTRALASIAN JOURNAL OF ANIMAL SCIENCES 2015; 28:599-603. [PMID: 25656193 PMCID: PMC4341111 DOI: 10.5713/ajas.14.0659] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Subscribe] [Scholar Register] [Received: 08/27/2014] [Revised: 11/02/2014] [Accepted: 11/09/2014] [Indexed: 12/04/2022]
Abstract
The objective of the current pilot study was to evaluate the reproductive performance and health indicators in Dorper, White Dorper, and Tsigai breed ewes managed semi-intensively under European temperate conditions. A total of 544 ewe-year units were observed, with ewes (ranging from 1.5 to 8 years of age) managed under identical rearing conditions for a period of two consecutive production cycles (2012 through 2013 and 2013 through 2014). In general, significant (p≤0.001) genotype-related disparities were found in occurrence rates for all health parameters taken into study. Clinical mastitis incidence was significantly lower (p≤0.05) in Dorper (9.4%) and White Dorper (10.8%) breeds compared to that of Tsigai ewes (17.4%). Significant differences (p≤0.05) for lameness were found between Dorper and Tsigai breeds, with occurrence rates of 8.0% and 2.9%, respectively. Incidence for pneumonia and abortion was not influenced (p>0.05) by the ewes’ genotype. Litter size was significantly lower (p≤0.05) in White Dorper breed than for Dorper and Tsigai ewes, of 1.21, 1.40, and 1.45, respectively. Conception rates and lambs survival were not affected (p>0.05) by genotype. Results suggest that South African Dorper and White Dorper sheep breeds have adapted well to the specific rearing conditions.
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Affiliation(s)
- D Gavojdian
- Banat's University of Agricultural Sciences and Veterinary Medicine 'King Michael I of Romania', Faculty of Animal Science and Biotechnologies, Timisoara 300645, Romania
| | - C Budai
- Banat's University of Agricultural Sciences and Veterinary Medicine 'King Michael I of Romania', Faculty of Animal Science and Biotechnologies, Timisoara 300645, Romania
| | - L T Cziszter
- Banat's University of Agricultural Sciences and Veterinary Medicine 'King Michael I of Romania', Faculty of Animal Science and Biotechnologies, Timisoara 300645, Romania
| | - N Csizmar
- Banat's University of Agricultural Sciences and Veterinary Medicine 'King Michael I of Romania', Faculty of Animal Science and Biotechnologies, Timisoara 300645, Romania
| | - A Javor
- Banat's University of Agricultural Sciences and Veterinary Medicine 'King Michael I of Romania', Faculty of Animal Science and Biotechnologies, Timisoara 300645, Romania
| | - S Kusza
- Banat's University of Agricultural Sciences and Veterinary Medicine 'King Michael I of Romania', Faculty of Animal Science and Biotechnologies, Timisoara 300645, Romania
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Adedeji AO, Barr B, Gomez-Lucia E, Murphy B. A polytropic caprine arthritis encephalitis virus promoter isolated from multiple tissues from a sheep with multisystemic lentivirus-associated inflammatory disease. Viruses 2013; 5:2005-18. [PMID: 23955501 PMCID: PMC3761239 DOI: 10.3390/v5082005] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/05/2013] [Revised: 08/03/2013] [Accepted: 08/12/2013] [Indexed: 11/23/2022] Open
Abstract
Caprine arthritis encephalitis virus (CAEV) is a lentivirus that infects both goats and sheep and is closely related to maedi-visna virus that infects sheep; collectively, these viruses are known as small ruminant lentiviruses (SRLV). Infection of goats and sheep with SRLV typically results in discrete inflammatory diseases which include arthritis, mastitis, pneumonia or encephalomyelitis. SRLV-infected animals concurrently demonstrating lentivirus-associated lesions in tissues of lung, mammary gland, joint synovium and the central nervous system are either very rare or have not been reported. Here we describe a novel CAEV promoter isolated from a sheep with multisystemic lentivirus-associated inflammatory disease including interstitial pneumonia, mastitis, polyarthritis and leukomyelitis. A single, novel SRLV promoter was cloned and sequenced from five different anatomical locations (brain stem, spinal cord, lung, mammary gland and carpal joint synovium), all of which demonstrated lesions characteristic of lentivirus associated inflammation. This SRLV promoter isolate was found to be closely related to CAEV promoters isolated from goats in northern California and other parts of the world. The promoter was denoted CAEV-ovine-MS (multisystemic disease); the stability of the transcription factor binding sites within the U3 promoter sequence are discussed.
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Affiliation(s)
- Adeyemi O Adedeji
- Veterinary Medical Teaching Hospital, School of Veterinary Medicine, University of California, Davis, CA 95616, USA.
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Synge B. Lentivirus infections in sheep and goats: how big is the burden? Vet J 2013; 197:521-2. [PMID: 23856392 DOI: 10.1016/j.tvjl.2013.06.008] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/03/2013] [Accepted: 06/13/2013] [Indexed: 10/26/2022]
Affiliation(s)
- Barti Synge
- Borthwick Farm, Gorebridge, Midlothian EH23 4QZ, Scotland, UK.
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