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Menay F, Cocozza F, Gravisaco MJ, Elisei A, Re JI, Ferella A, Waldner C, Mongini C. Extracellular vesicles derived from antigen-presenting cells pulsed with foot and mouth virus vaccine-antigens act as carriers of viral proteins and stimulate B cell response. Front Immunol 2024; 15:1440667. [PMID: 39176090 PMCID: PMC11338771 DOI: 10.3389/fimmu.2024.1440667] [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: 05/29/2024] [Accepted: 07/23/2024] [Indexed: 08/24/2024] Open
Abstract
Foot and mouth disease (FMD) is a highly contagious infection caused by FMD-virus (FMDV) that affects livestock worldwide with significant economic impact. The main strategy for the control is vaccination with FMDV chemically inactivated with binary ethylenimine (FMDVi). In FMDV infection and vaccination, B cell response plays a major role by providing neutralizing/protective antibodies in animal models and natural hosts. Extracellular vesicles (EVs) and small EVs (sEVs) such as exosomes are important in cellular communication. EVs secreted by antigen-presenting cells (APC) like dendritic cells (DCs) participate in the activation of B and T cells through the presentation of native antigen membrane-associated to B cells or by transferring MHC-peptide complexes to T cells and even complete antigens from DCs. In this study, we demonstrate for the first time that APC activated with the FMDVi O1 Campos vaccine-antigens secrete EVs expressing viral proteins/peptides that could stimulate FMDV-specific immune response. The secretion of EVs-FMDVi is a time-dependent process and can only be isolated within the first 24 h post-activation. These vesicles express classical EVs markers (CD9, CD81, and CD63), along with immunoregulatory molecules (MHC-II and CD86). With an average size of 155 nm, they belong to the category of EVs. Studies conducted in vitro have demonstrated that EVs-FMDVi express antigens that can stimulate a specific B cell response against FMDV, including both marginal zone B cells (MZB) and follicular B cells (FoB). These vesicles can also indirectly or directly affect T cells, indicating that they express both B and T epitopes. Additionally, lymphocyte expansion induced by EVs-FMDVi is greater in splenocytes that have previously encountered viral antigens in vivo. The present study sheds light on the role of EVs derived from APC in regulating the adaptive immunity against FMDV. This novel insight contributes to our current understanding of the immune mechanisms triggered by APC during the antiviral immune response. Furthermore, these findings may have practical implications for the development of new vaccine platforms, providing a rational basis for the design of more effective vaccines against FMDV and other viral diseases.
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Affiliation(s)
- Florencia Menay
- Laboratorio de Microvesículas, Exosomas y miRNA, Instituto de Virología y Innovaciones Tecnológicas (IVIT)-Consejo Nacional de Investigaciones Científicas y Técnicas (CONICET)-Instituto Nacional de Tecnología Agropecuaria (INTA), Hurlingham, Buenos Aires, Argentina
- Centro de Investigación en Ciencias Veterinarias y Agronómicas (CICVYA), Instituto Nacional de Tecnología Agropecuaria (INTA), Hurlingham, Buenos Aires, Argentina
| | - Federico Cocozza
- Institut National de la Santé et de la Recherche Médicale (INSERM-U932), Institut Curie, París, France
| | - Maria J. Gravisaco
- Centro de Investigación en Ciencias Veterinarias y Agronómicas (CICVYA), Instituto Nacional de Tecnología Agropecuaria (INTA), Hurlingham, Buenos Aires, Argentina
| | - Analia Elisei
- Centro de Investigación en Ciencias Veterinarias y Agronómicas (CICVYA), Instituto Nacional de Tecnología Agropecuaria (INTA), Hurlingham, Buenos Aires, Argentina
- Departamento de Patología, Servicio Nacional de Salud y Calidad Agroalimentaria (SENASA), Martinez, Buenos Aires, Argentina
| | - Javier Ignacio Re
- Centro de Investigación en Ciencias Veterinarias y Agronómicas (CICVYA), Instituto Nacional de Tecnología Agropecuaria (INTA), Hurlingham, Buenos Aires, Argentina
| | - Alejandra Ferella
- Laboratorio de Microvesículas, Exosomas y miRNA, Instituto de Virología y Innovaciones Tecnológicas (IVIT)-Consejo Nacional de Investigaciones Científicas y Técnicas (CONICET)-Instituto Nacional de Tecnología Agropecuaria (INTA), Hurlingham, Buenos Aires, Argentina
- Centro de Investigación en Ciencias Veterinarias y Agronómicas (CICVYA), Instituto Nacional de Tecnología Agropecuaria (INTA), Hurlingham, Buenos Aires, Argentina
| | - Claudia Waldner
- Laboratorio de Inmunología Celular y Molecular, Centro de Estudios Farmacologicos y Botanicos (CEFYBO) CONICET, Ciudad Autónoma de Buenos Aires, Argentina
| | - Claudia Mongini
- Laboratorio de Microvesículas, Exosomas y miRNA, Instituto de Virología y Innovaciones Tecnológicas (IVIT)-Consejo Nacional de Investigaciones Científicas y Técnicas (CONICET)-Instituto Nacional de Tecnología Agropecuaria (INTA), Hurlingham, Buenos Aires, Argentina
- Centro de Investigación en Ciencias Veterinarias y Agronómicas (CICVYA), Instituto Nacional de Tecnología Agropecuaria (INTA), Hurlingham, Buenos Aires, Argentina
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Lee S, Mattoo SUS, Jeong CG, Kim SC, Nazki S, Lee G, Park YS, Park SY, Yang MS, Kim B, Lee SM, Kim WI. Intradermal Inoculation of Inactivated Foot-and-Mouth Disease Vaccine Induced Effective Immune Responses Comparable to Conventional Intramuscular Injection in Pigs. Vaccines (Basel) 2024; 12:190. [PMID: 38400173 PMCID: PMC10892606 DOI: 10.3390/vaccines12020190] [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: 12/22/2023] [Revised: 02/07/2024] [Accepted: 02/08/2024] [Indexed: 02/25/2024] Open
Abstract
All pigs in the Republic of Korea are given the foot-and-mouth disease virus (FMDV) vaccine intramuscularly (IM) as part of the country's vaccination policy. However, the IM administration of the FMDV vaccine to pig results in residual vaccine components in the muscle and undesirable changes in muscle and soft tissues, causing economic losses in swine production. In this study, we evaluated whether intradermal (ID) vaccination could be proposed as an alternative to IM administration. ID vaccination (0.2 mL on each side of the neck muscle) and IM vaccination (2 mL on each side of the neck muscle) were performed twice, separated by 14 days, using a commercial FMD vaccine in specific-pathogen-free pigs. We observed growth performance, gross and microscopic lesions at the inoculation site, FMDV-specific antibodies, and neutralizing antibodies for 35 days after vaccination. Side effects on the skin grossly appeared following ID administration, but most were reduced within two weeks. All ID-vaccinated pigs showed inflammatory lesions limited to the dermis, but IM-vaccinated pigs had abnormal undesirable changes and pus in the muscle. ID-vaccinated pigs performed comparably to IM-vaccinated pigs in terms of growth, FMD virus-specific antibodies, protection capability against FMDV, and T-cell induction. This study demonstrated that the ID inoculation of the inactivated FMD vaccine induced immune responses comparable to an IM injection at 1/10 of the inoculation dose and that the inoculation lesion was limited to the dermis, effectively protecting against the formation of abnormal undesirable changes in muscle and soft tissues.
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Affiliation(s)
- Simin Lee
- College of Veterinary Medicine, Jeonbuk National University, 79 Gobong-ro, Iksan 54596, Republic of Korea; (S.L.); (C.-G.J.); (S.-C.K.); (S.N.)
| | - Sameer ul Salam Mattoo
- Division of Biotechnology, Jeonbuk National University, 79 Gobong-ro, Iksan 54596, Republic of Korea;
| | - Chang-Gi Jeong
- College of Veterinary Medicine, Jeonbuk National University, 79 Gobong-ro, Iksan 54596, Republic of Korea; (S.L.); (C.-G.J.); (S.-C.K.); (S.N.)
| | - Seung-Chai Kim
- College of Veterinary Medicine, Jeonbuk National University, 79 Gobong-ro, Iksan 54596, Republic of Korea; (S.L.); (C.-G.J.); (S.-C.K.); (S.N.)
| | - Salik Nazki
- College of Veterinary Medicine, Jeonbuk National University, 79 Gobong-ro, Iksan 54596, Republic of Korea; (S.L.); (C.-G.J.); (S.-C.K.); (S.N.)
- Pandemic Sciences Institute, Nuffield Department of Medicine, University of Oxford, Oxford OX3 7DQ, UK
| | - Gyehan Lee
- Miraclescope Inc., 700 Pangyo-ro, Seongnam 13516, Republic of Korea;
| | - Yong-Soo Park
- Department of Livestock, Korea National University of Agriculture and Fisheries, Jeonju 54874, Republic of Korea;
| | - Sun Young Park
- Animal and Plant Quarantine Agency, 177 Hyeoksin 8-ro, Gimcheon 39660, Republic of Korea;
| | - Myeon-Sik Yang
- Department of Companion and Laboratory Animal Science, Kongju National University, Yesan-eup, Yesan 32439, Republic of Korea;
| | - Bumseok Kim
- Biosafety Research Institute and Laboratory of Veterinary Pathology, College of Veterinary Medicine, Jeonbuk National University, 79 Gobong-ro, Iksan 54596, Republic of Korea;
| | - Sang-Myeong Lee
- College of Veterinary Medicine, Chungbuk National University, 1 Chungdae-ro, Chungju 28644, Republic of Korea
| | - Won-Il Kim
- College of Veterinary Medicine, Jeonbuk National University, 79 Gobong-ro, Iksan 54596, Republic of Korea; (S.L.); (C.-G.J.); (S.-C.K.); (S.N.)
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Taffarel AI, Barrios Benito MY, Hung VV, Cardillo S, Phuong NT, Caldevilla C, Galdo Novo S. Foot-and-mouth disease virus strains isolated in Vietnam during 2010-2019: genetic characterization and antigenic relatedness to the Euro SA vaccine. Arch Virol 2024; 169:44. [PMID: 38341400 DOI: 10.1007/s00705-024-05960-5] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/26/2023] [Accepted: 12/01/2023] [Indexed: 02/12/2024]
Abstract
Foot-and-mouth disease is a highly contagious disease that affects cloven-hoofed animals. It has an important socio-economic impact on the livestock industry because it produces a drastic decrease of productivity. The disease has been successfully eradicated from some regions, including North America and Western Europe, but it is still endemic in developing countries. Agriculture plays an important role in the national economy of Vietnam, to which animal production contributes a great proportion. The concurrent circulation of foot-and-mouth disease virus (FMDV) serotypes O, A, and Asia 1 has been detected in recent years, but serotype O remains the most prevalent and is responsible for the highest numbers of outbreaks. Appropriate vaccine strain selection is an important element in the control of FMD and is necessary for the application of vaccination programs in FMD-affected regions. Here, we present updated information about the genetic and antigenic characteristics of circulating strains, collected from endemic outbreaks involving types O and A, between 2010 and 2019. Neutralizing assays showed a good in vitro match between type O strains and the monovalent O1 Campos vaccine strain. High r1 values were obtained (above 0.7) when testing a swine serum pool collected 21 days after vaccination, but the O/VTN/2/2019 strain was an exception. An EPP estimation resulted in a median neutralizing titre of about 1.65 log10, indicating that good protection could be achieved. For type A Asia SEA 97 lineage strains, acceptable individual neutralizing titres were obtained with estimated EPP values over 80% for different combinations of vaccine strains. Taking into account that the r1 value is one tool of a battery of tests that should be considered for estimating the cross-protection of a field strain against a vaccine strain, an in vivo challenge experiment was also performed, yielding a PD50 value of 8.0. The results indicate that South American strains could be potentially used for controlling outbreaks involving these lineages. This study demonstrates the importance of considering strain characteristics when choosing vaccine strains and controls.
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Affiliation(s)
- Ana I Taffarel
- Laboratorio de Referencia OMSA Para Fiebre Aftosa, Dirección de Laboratorio Animal, SENASA, CP1640, Martínez Buenos Aires, Argentina
| | - Melanie Y Barrios Benito
- Laboratorio de Referencia OMSA Para Fiebre Aftosa, Dirección de Laboratorio Animal, SENASA, CP1640, Martínez Buenos Aires, Argentina
| | - Vo V Hung
- Department of Animal Health, Regional Animal Health Office (RAHO) No 6, Ho Chi Min, QMW4, Vietnam
| | | | - Nguyen T Phuong
- Department of Animal Health, Regional Animal Health Office (RAHO) No 6, Ho Chi Min, QMW4, Vietnam
| | | | - Sabrina Galdo Novo
- Laboratorio de Referencia OMSA Para Fiebre Aftosa, Dirección de Laboratorio Animal, SENASA, CP1640, Martínez Buenos Aires, Argentina.
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Kim J, Lee SH, Kim HH, Shin SH, Park SH, Park JH, Park CK. An Alternative Serological Measure for Assessing Foot-and-Mouth Disease Vaccine Efficacy against Homologous and Heterologous Viral Challenges in Pigs. Vaccines (Basel) 2023; 12:10. [PMID: 38276669 PMCID: PMC10820997 DOI: 10.3390/vaccines12010010] [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: 11/11/2023] [Revised: 12/16/2023] [Accepted: 12/19/2023] [Indexed: 01/27/2024] Open
Abstract
To analyze the relationship between homologous and heterologous serological titers of immunized pigs and their protection statuses against FMD virus challenges, in the present study, the correlation between the virus neutralization titers at 21 and 28 dpv and the protection statuses at 28 dpv against challenge with FMD virus was analyzed using data sets comprising five different combinations of homologous or heterologous challenge experiments in pigs vaccinated with type O (n = 96), A (n = 69), and Asia 1 (n = 74). As a result, the experiments were divided into three groups (21D-1, 21D-2, and 21D-3) in the 21-dpv model and two groups (28D-1 and 28D-2) in the 28-dpv model. Each response curve of groups 21D-1 and 21D-2 in the 21-dpv model was very similar to each curve of groups 28D-1 and 28D-2 in the 28-dpv model, respectively, even though there was an exceptional extra group (21D-3) in the 21-dpv model. The average titers estimating 0.75 probability of protection ranged from 1.06 to 1.62 log10 in the 21-dpv model and from 1.26 to 1.64 log10 in the 28-dpv model. In summary, we demonstrated that the serological method is useful for predicting the homologous and heterologous protection statuses of vaccinated pigs.
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Affiliation(s)
- Jaejo Kim
- Animal and Plant Quarantine Agency, 177 Hyeoksin 8-ro, Gimcheon City 39660, Gyeongsangbuk-do, Republic of Korea; (J.K.); (S.H.L.); (H.-H.K.); (S.-H.S.); (S.-H.P.)
| | - Seung Heon Lee
- Animal and Plant Quarantine Agency, 177 Hyeoksin 8-ro, Gimcheon City 39660, Gyeongsangbuk-do, Republic of Korea; (J.K.); (S.H.L.); (H.-H.K.); (S.-H.S.); (S.-H.P.)
| | - Ha-Hyun Kim
- Animal and Plant Quarantine Agency, 177 Hyeoksin 8-ro, Gimcheon City 39660, Gyeongsangbuk-do, Republic of Korea; (J.K.); (S.H.L.); (H.-H.K.); (S.-H.S.); (S.-H.P.)
| | - Sung-Ho Shin
- Animal and Plant Quarantine Agency, 177 Hyeoksin 8-ro, Gimcheon City 39660, Gyeongsangbuk-do, Republic of Korea; (J.K.); (S.H.L.); (H.-H.K.); (S.-H.S.); (S.-H.P.)
| | - Sang-Hyun Park
- Animal and Plant Quarantine Agency, 177 Hyeoksin 8-ro, Gimcheon City 39660, Gyeongsangbuk-do, Republic of Korea; (J.K.); (S.H.L.); (H.-H.K.); (S.-H.S.); (S.-H.P.)
| | - Jong-Hyeon Park
- Animal and Plant Quarantine Agency, 177 Hyeoksin 8-ro, Gimcheon City 39660, Gyeongsangbuk-do, Republic of Korea; (J.K.); (S.H.L.); (H.-H.K.); (S.-H.S.); (S.-H.P.)
| | - Choi-Kyu Park
- College of Veterinary Medicine & Animal Disease Intervention Center, Kyungpook National University, Daegu 41566, Republic of Korea
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Malirat V, Caldevilla C, Cardillo S, Espinoza AM, Novo SG, Taffarel A, Benito MB, Bergmann IE. Broad immunogenic spectrum of monovalent and trivalent foot-and-mouth disease virus vaccines containing O 1 campos, A24 cruzeiro and A Argentina 2001 strains against circulating viral lineages in cattle and pigs. Vaccine 2023; 41:5782-5790. [PMID: 37574343 DOI: 10.1016/j.vaccine.2023.08.007] [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: 05/19/2023] [Revised: 08/03/2023] [Accepted: 08/03/2023] [Indexed: 08/15/2023]
Abstract
FMD remains endemic in many Asian and African countries where multiple variants of serotypes O and A, among others, currently circulate. Due to lack of cross-protection between serotypes and incomplete protection between some strains even within a serotype, an important challenge for the application of effective vaccination programs is to select highly immunogenic and widely cross-reactive vaccine strains. Adaptation of a candidate field virus for use as a vaccine can be quite complex, so that whenever possible, the use of well-established vaccine viruses could have enormous advantages. FMD vaccine strains harmonized for use in South America have shown excellent results in FMD control, not only in the region, where it is still used systematically as a preventive measure, but also more recently in some Asian countries. To gain further insight into the immunogenic spectrum of these strains, VN tests (VNT) were performed with sera from cattle and/or pigs vaccinated with monovalent (type O) or trivalent (types O and A) formulations against 122 type O and 32 type A field viruses isolated from 35 countries in Asia and Africa, belonging to different lineages. Almost all VNT titers obtained were within the expected protective level, indicating the wide immunogenic spectrum of high potency FMD vaccines formulated with O1 Campos, A24 Cruzeiro and A Argentina 2001 South American vaccine strains belonging to EURO-SA topotypes against currently active viruses from other topotypes. These in vitro results are in line with previously reported in vivo challenge tests in pigs against three A/ASIA/Sea-97 isolates and two isolates belonging to type O lineages O/SEA/Mya-98 and O/ME-SA/Ind-2001e.
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Affiliation(s)
- Viviana Malirat
- Centro de Virología Humana y Animal (CEVHAN), CONICET-UAI, Av. Montes de Oca 745, CABA, Argentina
| | - Cecilia Caldevilla
- Biogénesis Bagó S.A., Ruta Panamericana Km 38,5, (B1619IEA), Garín, Provincia de Buenos Aires, Argentina
| | - Sabrina Cardillo
- Biogénesis Bagó S.A., Ruta Panamericana Km 38,5, (B1619IEA), Garín, Provincia de Buenos Aires, Argentina
| | - Ana María Espinoza
- Biogénesis Bagó S.A., Ruta Panamericana Km 38,5, (B1619IEA), Garín, Provincia de Buenos Aires, Argentina
| | - Sabrina Galdo Novo
- Servicio Nacional de Sanidad y Calidad Agroalimentaria (SENASA), Talcahuano 1660, CP 1640 Martínez, Argentina
| | - Ana Taffarel
- Servicio Nacional de Sanidad y Calidad Agroalimentaria (SENASA), Talcahuano 1660, CP 1640 Martínez, Argentina
| | - Melanie Barrios Benito
- Servicio Nacional de Sanidad y Calidad Agroalimentaria (SENASA), Talcahuano 1660, CP 1640 Martínez, Argentina
| | - Ingrid E Bergmann
- Centro de Virología Humana y Animal (CEVHAN), CONICET-UAI, Av. Montes de Oca 745, CABA, Argentina.
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Heterologous Prime-Boost Vaccination with Commercial FMD Vaccines Elicits a Broader Immune Response than Homologous Prime-Boost Vaccination in Pigs. Vaccines (Basel) 2023; 11:vaccines11030551. [PMID: 36992134 DOI: 10.3390/vaccines11030551] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/15/2023] [Revised: 02/22/2023] [Accepted: 02/22/2023] [Indexed: 03/03/2023] Open
Abstract
Three commercial vaccines are administered in domestic livestock farms for routine vaccination to aid for foot-and-mouth disease (FMD) control in Korea. Each vaccine contains distinct combinations of inactivated serotype O and A FMD virus (FMDV) antigens: O/Manisa + O/3039 + A/Iraq formulated in a double oil emulsion (DOE), O/Primorsky + A/Zabaikalsky formulated in a DOE, and O/Campos + A/Cruzeiro + A/2001 formulated in a single oil emulsion. Despite the recommendation for a prime-boost vaccination with the same vaccine in fattening pigs, occasional cross-inoculation is inevitable for many reasons, such as lack of compliance with vaccination guidelines, erroneous application, or change in vaccine types by suppliers. Therefore, there have been concerns that a poor immune response could be induced by cross-inoculation due to a failure to boost the immune response. In the present study, it was demonstrated by virus neutralization and ELISA tests that cross-inoculation of pigs with three commercial FMD vaccines does not hamper the immune response against the primary vaccine strains and enhances broader cross-reactivity against heterologous vaccine antigens whether they were applied or not. Therefore, it could be concluded that the cross-inoculation of FMD vaccines can be used as a regimen to strategically overcome the limitation of the antigenic spectrum induced by the original regimen.
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Upadhyaya S, Mahapatra M, Mioulet V, Parida S. Molecular Basis of Antigenic Drift in Serotype O Foot-and-Mouth Disease Viruses (2013-2018) from Southeast Asia. Viruses 2021; 13:1886. [PMID: 34578467 PMCID: PMC8473337 DOI: 10.3390/v13091886] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/27/2021] [Revised: 09/10/2021] [Accepted: 09/14/2021] [Indexed: 12/28/2022] Open
Abstract
Foot and mouth disease (FMD) is a highly contagious disease of cloven-hoofed animals with serious economic consequences. FMD is endemic in Southeast Asia (SEA) and East Asia (EA) with the circulation of multiple serotypes, posing a threat to Australia and other FMD-free countries. Although vaccination is one of the most important control measures to prevent FMD outbreaks, the available vaccines may not be able to provide enough cross-protection against the FMD viruses (FMDVs) circulating in these countries due to the incursion of new lineages and sub-lineages as experienced in South Korea during 2010, a FMD-free country, when a new lineage of serotype O FMDV (Mya-98) spread to the country, resulting in devastating economic consequences. In this study, a total of 62 serotype O (2013-2018) viruses selected from SEA and EA countries were antigenically characterized by virus neutralization tests using three existing (O/HKN/6/83, O/IND/R2/75 and O/PanAsia-2) and one putative (O/MYA/2009) vaccine strains and full capsid sequencing. The Capsid sequence analysis revealed three topotypes, Cathay, SEA and Middle East-South Asia (ME-SA) of FMDVs circulating in the region. The vaccines used in this study showed a good match with the SEA and ME-SA viruses. However, none of the recently circulating Cathay topotype viruses were protected by any of the vaccine strains, including the existing Cathay topotype vaccine (O/HKN/6/83), indicating an antigenic drift and, also the urgency to monitor this topotype in the region and develop a new vaccine strain if necessary, although currently the presence of this topotype is mainly restricted to China, Hong Kong, Taiwan and Vietnam. Further, the capsid sequences of these viruses were analyzed that identified several capsid amino acid substitutions involving neutralizing antigenic sites 1, 2 and 5, which either individually or together could underpin the observed antigenic drift.
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Affiliation(s)
- Sasmita Upadhyaya
- The Pirbright Institute, Ash Road, Pirbright GU24 ONF, UK; (S.U.); (M.M.); (V.M.)
| | - Mana Mahapatra
- The Pirbright Institute, Ash Road, Pirbright GU24 ONF, UK; (S.U.); (M.M.); (V.M.)
| | - Valerie Mioulet
- The Pirbright Institute, Ash Road, Pirbright GU24 ONF, UK; (S.U.); (M.M.); (V.M.)
| | - Satya Parida
- The Pirbright Institute, Ash Road, Pirbright GU24 ONF, UK; (S.U.); (M.M.); (V.M.)
- Food and Agriculture Organization of the United Nations (FAO), 00153 Rome, Italy
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Park MY, Han YJ, Choi EJ, Kim H, Pervin R, Shin W, Kwon D, Kim JM, Pyo HM. Post-vaccination Monitoring to Assess Foot-and-Mouth Disease Immunity at Population Level in Korea. Front Vet Sci 2021; 8:673820. [PMID: 34422940 PMCID: PMC8371437 DOI: 10.3389/fvets.2021.673820] [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] [Accepted: 06/22/2021] [Indexed: 11/27/2022] Open
Abstract
In South Korea, domestic cattle, pigs, and goats were subjected to mandatory foot-and-mouth disease (FMD) vaccination and year-round serosurveillance since 2011. In 2020, approximately USD 95 million was spent solely for FMD vaccine purchase for 59 million livestock, and 1.25 million samples were tested to estimate the population immunity and demonstrate the absence of virus circulation. As the FMD vaccination program was revised in 2018, the post-vaccination monitoring (PVM) was designed to evaluate the effectiveness of the vaccine program of three vaccines approved for routine use. To this end, monitoring post-vaccination immunity has been conducted by collecting 35,626 serum samples at 28 days post-vaccination following regular national vaccinations, which were carried out in April and in October in 2020. The design of the serological test for PVM was specially targeted at particular livestock groups, including dairy cattle, goats, and beef cattle aged 6–12 months, which were generally estimated to have a low expected seroprevalence. The risk factors had also been identified, considering the increased likelihood of infection in a particular location, herd size, and husbandry system applied in a targeted sample collection. Serum sample collection and SP-O and NSP antibody tests were performed by local veterinary laboratories using commercially available ELISAs. The current FMD vaccination program, which was performed twice a year following the regimen of primary vaccination and boost, resulted in over 80% population immunity. The seroprevalence monitored after the vaccination in fall was higher than the one studied in spring except in pigs. It was demonstrated that the seroprevalence of risk-based targeted samples ranged from 93.8 to 100% in cattle, 63.2 to 100% in pigs, and 20.0 to 100% in goats. Of note is the area near the North Korean borders which showed a relatively low seroprevalence among the targeted regions, and no NSP sero-positive reactor was detected in this region. When subpopulation immunity at the individual level was assessed, the seroprevalence in young cattle stock was slightly lower (95.8%) than that of adults (98.4%). In conclusion, the FMD vaccination campaign has been successfully implemented in Korea, and the PVM can be a supplementary program for massive routine surveillance in terms of providing timely information needed both to estimate population immunity and to properly target “risk-based surveillance.”
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Affiliation(s)
- Mi-Young Park
- Foot and Mouth Disease Diagnostic Division, Animal and Plant Quarantine Agency, Gimcheon-si, South Korea
| | - You Jin Han
- Foot and Mouth Disease Diagnostic Division, Animal and Plant Quarantine Agency, Gimcheon-si, South Korea
| | - Eun-Jin Choi
- Foot and Mouth Disease Diagnostic Division, Animal and Plant Quarantine Agency, Gimcheon-si, South Korea
| | - HeeYeon Kim
- Foot and Mouth Disease Diagnostic Division, Animal and Plant Quarantine Agency, Gimcheon-si, South Korea
| | - Rokeya Pervin
- Foot and Mouth Disease Diagnostic Division, Animal and Plant Quarantine Agency, Gimcheon-si, South Korea
| | - Wonseok Shin
- Foot and Mouth Disease Diagnostic Division, Animal and Plant Quarantine Agency, Gimcheon-si, South Korea
| | - Doheon Kwon
- Foot and Mouth Disease Diagnostic Division, Animal and Plant Quarantine Agency, Gimcheon-si, South Korea
| | - Jae Myoung Kim
- Foot and Mouth Disease Diagnostic Division, Animal and Plant Quarantine Agency, Gimcheon-si, South Korea
| | - Hyun Mi Pyo
- Foot and Mouth Disease Diagnostic Division, Animal and Plant Quarantine Agency, Gimcheon-si, South Korea
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Choi J, Jo HJ, Jung SS, Choi J, Lee SH, Kim HH, Kim YJ, Kim B, Park JH, Kim J. Evaluation of swine protection with foot-and-mouth disease O 1/Campos and O/Primorsky/2014 vaccines against the O Mya-98 lineage virus from East Asia. Vaccine 2021; 39:1701-1707. [PMID: 33618945 DOI: 10.1016/j.vaccine.2021.02.025] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/09/2020] [Revised: 02/05/2021] [Accepted: 02/10/2021] [Indexed: 11/17/2022]
Abstract
Two type O commercial vaccines, the O1/Campos and O/Primorsky/2014 vaccines, were studied to evaluate the in vivo efficacy in pigs against heterologous virus challenge with the O/SKR/Jincheon/2014 virus (O/SEA/Mya-98 lineage) isolated in Korea in 2014. The in vivo challenge results indicated that both vaccines induced a high heterologous virus neutralization test (VNT) titer by a single injection and successfully protected specific pathogen-free (SPF) pigs from challenge infection. To determine the optimal vaccination age, a field trial with each vaccine was conducted with three one-shot-vaccinated groups that were injected at 8, 12, or 14 weeks of age and one two-shot-vaccinated group that was injected at 8 and 12 weeks of age in the pig farms. In these field trials, the improved serological performance at 20 and 24 weeks of age expected with vaccination at 12 or 14 weeks of age was not observed, although improved serological results were expected as the result of decreasing interference of maternally derived antibodies (MDAs), as MDAs waned with age. In addition, delayed vaccination resulted in MDA depletion at 14 weeks of age. Therefore, the optimal age for primary vaccination with two different formulated vaccines was 8 weeks old in pigs, considering that MDAs could provide a protective immunity against foot-and-mouth disease (FMD) infection. Prolonged significantly higher VNT titers of immunized pigs were demonstrated in the two-shot-vaccinated groups. In total, the effectiveness of the two vaccines was demonstrated through efficacy tests and field trials in pigs.
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Affiliation(s)
- Jieun Choi
- Animal and Plant Quarantine Agency, 177 Hyeoksin 8-ro, Gimcheon City, Gyeongsangbuk-do 39660, Republic of Korea
| | - Hye Jun Jo
- Korea Disease Control and Prevention Agency, Osong Health Technology Administration Complex, 187, Osongsaengmyeong 2-ro, Osong-eup, Heungdeok-gu, Cheongju-si, Chungcheongbuk-do 28159, Republic of Korea
| | - Sung Suk Jung
- Animal and Plant Quarantine Agency, 177 Hyeoksin 8-ro, Gimcheon City, Gyeongsangbuk-do 39660, Republic of Korea
| | - Jida Choi
- Animal and Plant Quarantine Agency, 177 Hyeoksin 8-ro, Gimcheon City, Gyeongsangbuk-do 39660, Republic of Korea
| | - Seung Heon Lee
- Animal and Plant Quarantine Agency, 177 Hyeoksin 8-ro, Gimcheon City, Gyeongsangbuk-do 39660, Republic of Korea
| | - Ha-Hyun Kim
- Animal and Plant Quarantine Agency, 177 Hyeoksin 8-ro, Gimcheon City, Gyeongsangbuk-do 39660, Republic of Korea
| | - Yong-Joo Kim
- Animal and Plant Quarantine Agency, 177 Hyeoksin 8-ro, Gimcheon City, Gyeongsangbuk-do 39660, Republic of Korea
| | - Byounghan Kim
- Animal and Plant Quarantine Agency, 177 Hyeoksin 8-ro, Gimcheon City, Gyeongsangbuk-do 39660, Republic of Korea
| | - Jong-Hyeon Park
- Animal and Plant Quarantine Agency, 177 Hyeoksin 8-ro, Gimcheon City, Gyeongsangbuk-do 39660, Republic of Korea
| | - Jaejo Kim
- Animal and Plant Quarantine Agency, 177 Hyeoksin 8-ro, Gimcheon City, Gyeongsangbuk-do 39660, Republic of Korea.
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Bergmann IE, Malirat V, Pedemonte A, Maradei E. Challenges in foot-and-mouth disease virus strain selection as an input to attain broad vaccine intraserotype cross-protection. Expert Rev Vaccines 2021; 20:13-22. [PMID: 33455492 DOI: 10.1080/14760584.2021.1877137] [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] [Indexed: 10/22/2022]
Abstract
Introduction: Vaccination against foot-and-mouth disease virus is regarded as the most effective way to prevent disease. Selection of appropriate vaccine strains is challenging due to lack of cross-protection between serotypes and incomplete protection between some strains within a serotype. Vaccine effectiveness can be affected by vaccine formulation, vaccination approaches, and also by emerging field variants. Therefore, a precise evaluation of the protective capacity of the selected vaccine virus is essential.Areas covered: This article discusses the limitations of currently in use in vitro methods to assess the protective capacity of vaccine strains. It includes the assessment of well-established South American vaccine strains, O1/Campos and A24/Cruzeiro, against outbreaks/emergencies in the continent, as well as against recent isolates from East and Southeast Asia.Expert opinion: In vitro methods, and particularly r1 values, used to evaluate the protective capacity of vaccine strains are not conclusive and do not cover the variety of field scenarios. At present, an option when facing emergencies could be to use well-established vaccine strains with broad antigenic/immunogenic coverage, including conditions that lead to increased coverage such as vaccine formulations and vaccination schemes.
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Affiliation(s)
- Ingrid E Bergmann
- Centro De Virología Animal (CEVAN), CONICET, Pabellón IAFE, (OCA Ciudad Universitaria), Buenos Aires, Argentina
| | - Viviana Malirat
- Centro De Virología Animal (CEVAN), CONICET, Pabellón IAFE, (OCA Ciudad Universitaria), Buenos Aires, Argentina
| | - Andrea Pedemonte
- Animal Health Laboratory, Servicio Nacional De Sanidad Y Calidad Agroalimentaria (SENASA), Martínez, CP, Argentina
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Gnazzo V, Quattrocchi V, Soria I, Pereyra E, Langellotti C, Pedemonte A, Lopez V, Marangunich L, Zamorano P. Mouse model as an efficacy test for foot-and-mouth disease vaccines. Transbound Emerg Dis 2020; 67:2507-2520. [PMID: 32320534 DOI: 10.1111/tbed.13591] [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: 01/29/2020] [Revised: 03/30/2020] [Accepted: 03/31/2020] [Indexed: 12/01/2022]
Abstract
Protection against foot-and-mouth disease virus (FMDV) has been linked to the development of a humoral response. In Argentina, the official control tests for assessing the potency of FMD vaccines are protection against podal generalization (PPG) and expected percentage of protection (EPP) curves built with quantitative data of antibodies determined by liquid-phase blocking ELISA (lpELISA). The results of these tests are used to accept or discard vaccines at the batch level. In this report, a mouse model was assessed as an alternative efficacy control for FMDV vaccines. To this aim, groups of cattle (n = 18) and BALB/c mice (n = 16) were inoculated with commercial FMDV vaccines and bleedings were performed 60 days post vaccination (dpv) in cattle and 21 dpv in mice. Specific FMDV antibody titres were measured in both species by a standardized lpELISA. A statistically significant association between antibody levels in cattle and mice has already been demonstrated. However, some vaccines have been misclassified since they were considered protective based on lpELISA results but did not induce good protection in cattle upon challenge. For this reason, other immunological parameters were evaluated to improve the prediction of protection in mice, without the need of using infective virus. In addition, antibody titres by lpELISA, the IgG2b/IgG1 isotype ratio and the Avidity Index were identified as good predictors, resulting in an optimal predictive model of protection. This mouse model could be a simple and economic alternative for testing FMD vaccines since the disadvantages of high costs and facility requirements associated with the use of large animals are overcome.
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Affiliation(s)
- Victoria Gnazzo
- Instituto Nacional de Tecnología Agropecuaria, Nicolas Repetto y Los Reseros, Buenos Aires, Argentina
| | - Valeria Quattrocchi
- Instituto Nacional de Tecnología Agropecuaria, Nicolas Repetto y Los Reseros, Buenos Aires, Argentina
| | - Ivana Soria
- Instituto Nacional de Tecnología Agropecuaria, Nicolas Repetto y Los Reseros, Buenos Aires, Argentina
| | - Erica Pereyra
- Instituto Nacional de Tecnología Agropecuaria, Nicolas Repetto y Los Reseros, Buenos Aires, Argentina
| | - Cecilia Langellotti
- Instituto Nacional de Tecnología Agropecuaria, Nicolas Repetto y Los Reseros, Buenos Aires, Argentina
| | - Andrea Pedemonte
- Instituto Nacional de Tecnología Agropecuaria, Nicolas Repetto y Los Reseros, Buenos Aires, Argentina
| | - Virginia Lopez
- Instituto Nacional de Tecnología Agropecuaria, Nicolas Repetto y Los Reseros, Buenos Aires, Argentina
| | - Laura Marangunich
- Instituto Nacional de Tecnología Agropecuaria, Nicolas Repetto y Los Reseros, Buenos Aires, Argentina
| | - Patricia Zamorano
- Instituto Nacional de Tecnología Agropecuaria, Nicolas Repetto y Los Reseros, Buenos Aires, Argentina
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Ko MK, Jo HE, Choi JH, You SH, Shin SH, Jo H, Lee MJ, Kim SM, Kim B, Park JH. Improved foot-and-mouth disease vaccine with O PanAsia-2 strain protect pigs against O/Jincheon/SKR/2014 originated from South Korea. Vaccine 2020; 38:1120-1128. [PMID: 31810782 DOI: 10.1016/j.vaccine.2019.11.029] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/01/2019] [Revised: 11/05/2019] [Accepted: 11/12/2019] [Indexed: 11/19/2022]
Abstract
Efforts are required to develop foot-and-mouth disease (FMD) vaccines in Asia that can respond to the type O outbreaks that have continued with the devastating damage since 2010. It is necessary to develop vaccine strains that can provide protection against the ME-SA topotype, which has tended to spread into neighboring areas, and the frequent SEA topotype outbreaks. To this end, this study aimed to develop a FMD vaccine utilizing O PanAsia-2 that is able to provide broad protection against ME-SA as the vaccine strain, with a focus on the O/Jincheon/SKR/2014 virus (SEA topotype), the outbreaks of which have persisted in spite of the enforcement of FMD vaccination. The virus neutralizing antibody (VN) titer to the ME-SA topotype (especially, Ind2001 lineage) virus in pigs was the highest, followed by SEA, while the VN titers to the Cathay and EURO-SA topotypes were similar. In the O/Jincheon/SKR/2014 virus challenge test, all pigs were protected against the virus, and almost no virus shedding was detected after the virus challenge. In the immunization test performed on cattle and pigs, antibodies with sufficient protective activity were produced in cattle two weeks after the first immunization, and pigs exhibited lower immunity compared to cattle. However, immunity was improved enough in pigs to provide protection against the virus challenge after the second immunization, with a significant increase in antibody production.
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Affiliation(s)
- Mi-Kyeong Ko
- Center for Foot-and-Mouth Disease Vaccine Research, Animal and Plant Quarantine Agency, 177 Hyeoksin 8-ro, Gimcheon City, Gyeongsangbuk-do 39660, Republic of Korea
| | - Hye-Eun Jo
- Center for Foot-and-Mouth Disease Vaccine Research, Animal and Plant Quarantine Agency, 177 Hyeoksin 8-ro, Gimcheon City, Gyeongsangbuk-do 39660, Republic of Korea
| | - Joo-Hyung Choi
- Center for Foot-and-Mouth Disease Vaccine Research, Animal and Plant Quarantine Agency, 177 Hyeoksin 8-ro, Gimcheon City, Gyeongsangbuk-do 39660, Republic of Korea
| | - Su-Hwa You
- Center for Foot-and-Mouth Disease Vaccine Research, Animal and Plant Quarantine Agency, 177 Hyeoksin 8-ro, Gimcheon City, Gyeongsangbuk-do 39660, Republic of Korea
| | - Sung Ho Shin
- Center for Foot-and-Mouth Disease Vaccine Research, Animal and Plant Quarantine Agency, 177 Hyeoksin 8-ro, Gimcheon City, Gyeongsangbuk-do 39660, Republic of Korea
| | - Hyundong Jo
- Center for Foot-and-Mouth Disease Vaccine Research, Animal and Plant Quarantine Agency, 177 Hyeoksin 8-ro, Gimcheon City, Gyeongsangbuk-do 39660, Republic of Korea
| | - Min Ja Lee
- Center for Foot-and-Mouth Disease Vaccine Research, Animal and Plant Quarantine Agency, 177 Hyeoksin 8-ro, Gimcheon City, Gyeongsangbuk-do 39660, Republic of Korea
| | - Su-Mi Kim
- Center for Foot-and-Mouth Disease Vaccine Research, Animal and Plant Quarantine Agency, 177 Hyeoksin 8-ro, Gimcheon City, Gyeongsangbuk-do 39660, Republic of Korea
| | - Byounghan Kim
- Center for Foot-and-Mouth Disease Vaccine Research, Animal and Plant Quarantine Agency, 177 Hyeoksin 8-ro, Gimcheon City, Gyeongsangbuk-do 39660, Republic of Korea
| | - Jong-Hyeon Park
- Center for Foot-and-Mouth Disease Vaccine Research, Animal and Plant Quarantine Agency, 177 Hyeoksin 8-ro, Gimcheon City, Gyeongsangbuk-do 39660, Republic of Korea.
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Jo HE, Ko MK, Choi JH, Shin SH, Jo H, You SH, Lee MJ, Kim SM, Kim B, Park JH. New foot-and-mouth disease vaccine, O JC-R, induce complete protection to pigs against SEA topotype viruses occurred in South Korea, 2014-2015. J Vet Sci 2019; 20:e42. [PMID: 31364326 PMCID: PMC6669207 DOI: 10.4142/jvs.2019.20.e42] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/29/2019] [Revised: 04/24/2019] [Accepted: 06/13/2019] [Indexed: 11/20/2022] Open
Abstract
Foot-and-mouth disease (FMD) is an acute epidemic that spreads rapidly among cattle and pigs. In 2014, in Korea, despite enforced vaccination, the type O Southeast Asia (SEA) topotype viruses (Mya-98 lineage) infected mainly cattle and pigs simultaneously, thereby causing enormous damage. If a vaccine that is completely protective against this FMD virus is developed and used, it can become a very important preventive measure in Asia, which is where this type of virus mainly circulates. The SEA topotype has been steadily evolving and transforming into new variations since it became epidemic in Asia. Therefore, it became necessary to develop a new vaccine that could provide protection against the FMD virus strain that was responsible for the 2014–2015 outbreak in Korea. This study aimed to develop a vaccine that would provide complete protection against the SEA topotype FMD virus to control sporadic FMD outbreaks, which occur despite the enforcement of vaccination, and to completely prevent virus shedding, thereby preventing the virus from spreading. The vaccine candidate virus developed in this study showed low pathogenicity and can be distinguished from the wild-type FMD virus strain. The developed vaccine was able to protect mice from SEA and Middle East–South Asia topotype virus strains and induced high titers of antibodies against both virus strains in pigs, thereby confirming the sufficiency of its protective function. In particular, the results of the SEA topotype virus challenge test in pigs revealed that perfect immunity was created in the vaccinated pigs, without virus shedding and viremia.
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Affiliation(s)
- Hye Eun Jo
- Center for Foot-and-Mouth Disease Vaccine Research, Animal and Plant Quarantine Agency, Gimcheon 39660, Korea
| | - Mi Kyeong Ko
- Center for Foot-and-Mouth Disease Vaccine Research, Animal and Plant Quarantine Agency, Gimcheon 39660, Korea
| | - Joo Hyung Choi
- Center for Foot-and-Mouth Disease Vaccine Research, Animal and Plant Quarantine Agency, Gimcheon 39660, Korea
| | - Sung Ho Shin
- Center for Foot-and-Mouth Disease Vaccine Research, Animal and Plant Quarantine Agency, Gimcheon 39660, Korea
| | - Hyundong Jo
- Center for Foot-and-Mouth Disease Vaccine Research, Animal and Plant Quarantine Agency, Gimcheon 39660, Korea
| | - Su Hwa You
- Center for Foot-and-Mouth Disease Vaccine Research, Animal and Plant Quarantine Agency, Gimcheon 39660, Korea
| | - Min Ja Lee
- Center for Foot-and-Mouth Disease Vaccine Research, Animal and Plant Quarantine Agency, Gimcheon 39660, Korea
| | - Su Mi Kim
- Center for Foot-and-Mouth Disease Vaccine Research, Animal and Plant Quarantine Agency, Gimcheon 39660, Korea
| | - Byounghan Kim
- Center for Foot-and-Mouth Disease Vaccine Research, Animal and Plant Quarantine Agency, Gimcheon 39660, Korea
| | - Jong Hyeon Park
- Center for Foot-and-Mouth Disease Vaccine Research, Animal and Plant Quarantine Agency, Gimcheon 39660, Korea.
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Improved foot-and-mouth disease vaccine, O TWN-R, protects pigs against SEA topotype virus occurred in South Korea. Vet Microbiol 2019; 236:108374. [PMID: 31500734 DOI: 10.1016/j.vetmic.2019.07.026] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/31/2019] [Revised: 07/21/2019] [Accepted: 07/24/2019] [Indexed: 12/31/2022]
Abstract
Foot-and-mouth disease (FMD) is a highly contagious disease and causes economic damage at a national level. In particular, the type O FMD virus (FMDV) is a serotype that causes FMD outbreaks most frequently in the world. In recent years, Southeast Asia (SEA), Middle East-South Asia (ME-SA), and Cathay topotype-mediated FMD are prevalent in Asia, among which the SEA and ME-SA topotypes cause a majority of the outbreaks. The SEA topotype virus is more likely to infect both cattle and pigs simultaneously, thereby resulting in more severe damages; thus, it is necessary to study the protection ability of the candidate vaccines of this topotype after immunization. In this study, an experimental vaccine for pigs was produced using a vaccine strain that contains the structural protein of the O Taiwan97 strain, which was derived from the Cathay topotype, and its effect was evaluated. In the immunization test in pigs and cattle, the antibody titers were found to be elevated two weeks after immunization and very high titers of neutralizing antibodies were formed after four weeks. After the second inoculation, very high titers of neutralizing antibodies were produced in both species in the fourth week after immunization, and the antibodies maintained for up to six months and three months in cattle and pigs, respectively. No significant immunological difference in antibody production was observed in cattle and pigs. This study confirmed that complete protection from the challenge of the SEA topotype virus (O/Jincheon/SKR/2014), although the antibody titers against O/Jincheon/SKR/2014 strain were not that high, was achieved through immunization with the newly developed Cathay topotype vaccine in pigs.
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Versatility of the adenovirus-vectored foot-and-mouth disease vaccine platform across multiple foot-and-mouth disease virus serotypes and topotypes using a vaccine dose representative of the AdtA24 conditionally licensed vaccine. Vaccine 2018; 36:7345-7352. [DOI: 10.1016/j.vaccine.2018.10.031] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/11/2018] [Revised: 10/03/2018] [Accepted: 10/06/2018] [Indexed: 12/14/2022]
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