Fate of Neospora-seropositive animals: an opinion
Neospora caninum is an abortive protozoon in cattle, which causes severe economic losses worldwide. Chronically infected cattle however develop immune responses protecting against further Neospora induced abortions. Controversy about losses other than abortion in Neospora-infected cattle still exist...
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| Formato: | info:ar-repo/semantics/artículo |
| Lenguaje: | Inglés |
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Sociedad Chilena de Parasitología
2019
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| Acceso en línea: | https://scielo.conicyt.cl/pdf/parasitol/v60n3-4/art18.pdf http://hdl.handle.net/20.500.12123/6595 http://dx.doi.org/10.4067/S0717-77122005000200018 |
| _version_ | 1855035703866425344 |
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| author | Moore, Prando Dadin |
| author_browse | Moore, Prando Dadin |
| author_facet | Moore, Prando Dadin |
| author_sort | Moore, Prando Dadin |
| collection | INTA Digital |
| description | Neospora caninum is an abortive protozoon in cattle, which causes severe economic losses worldwide. Chronically infected cattle however develop immune responses protecting against further Neospora induced abortions. Controversy about losses other than abortion in Neospora-infected cattle still exists. Although, culling of seropositive animals has been recommended as a strategy for reducing economic losses due to N. caninum, there is no guarantee of escaping postnatal infection and abortion storms by having a "Neospora-sterile herd". An inactivated vaccine has been demonstrated to reduce abortion rates. Antibodies generated by natural infection can not presently be differentiated from those induced by vaccination; however, since maternal antibodies disappear by 6 months in calves born to vaccinated heifers, a test-and cull strategy could be performed in replacement heifers before breeding and vaccination. This review article discusses control strategies for Neospora-infection in cattle, and provides suggestions for further research. |
| format | info:ar-repo/semantics/artículo |
| id | INTA6595 |
| institution | Instituto Nacional de Tecnología Agropecuaria (INTA -Argentina) |
| language | Inglés |
| publishDate | 2019 |
| publishDateRange | 2019 |
| publishDateSort | 2019 |
| publisher | Sociedad Chilena de Parasitología |
| publisherStr | Sociedad Chilena de Parasitología |
| record_format | dspace |
| spelling | INTA65952019-12-30T13:52:53Z Fate of Neospora-seropositive animals: an opinion Moore, Prando Dadin Neospora caninum Enfermedades de los Animales Ganado Bovino Inmunología Animal Diseases Cattle Immunology Neospora caninum is an abortive protozoon in cattle, which causes severe economic losses worldwide. Chronically infected cattle however develop immune responses protecting against further Neospora induced abortions. Controversy about losses other than abortion in Neospora-infected cattle still exists. Although, culling of seropositive animals has been recommended as a strategy for reducing economic losses due to N. caninum, there is no guarantee of escaping postnatal infection and abortion storms by having a "Neospora-sterile herd". An inactivated vaccine has been demonstrated to reduce abortion rates. Antibodies generated by natural infection can not presently be differentiated from those induced by vaccination; however, since maternal antibodies disappear by 6 months in calves born to vaccinated heifers, a test-and cull strategy could be performed in replacement heifers before breeding and vaccination. This review article discusses control strategies for Neospora-infection in cattle, and provides suggestions for further research. Neospora caninum es un protozoo que causa abortos en los bovinos produciendo importantes pérdidas económicas en todo el mundo. Existe evidencia reciente que demuestra que los bovinos infectados en forma crónica desarrollan mecanismos inmunes de protección contra el aborto causado por N. caninum. Por otro lado, la existencia de otras pérdidas económicas distintas del aborto es aún tema de controversia. Aunque la eliminación de bovinos seropositivos a la enfermedad a sido recomendado como medida de control sanitaria, un rodeo libre de infección no está exento de sufrir una exposición postnatal y "tormentas" de abortos. La utilización de una vacuna inactivada disminuye la tasa de abortos; sin embargo los anticuerpos vacunales no pueden ser diferenciados de aquellos producidos por infecciones naturales. Considerando que los anticuerpos maternos desaparecen a los 6 meses de vida, la serología de terneras de reemplazo antes del servicio y la vacunación podría ser una posible estrategia de control. Este artículo discute las estrategias de control para limitar la difusión de la neosporosis en bovinos y brinda posibles líneas de investigación. EEA Balcarce Fil: Moore, Dadín Prando. Instituto Nacional de Tecnología Agropecuaria (INTA). Estación Experimental Agropecuaria Balcarce; Argentina. Consejo Nacional de Investigaciones Científicas y Técnicas (CONICET); Argentina. 2019-12-30T13:50:40Z 2019-12-30T13:50:40Z 2005-12 info:ar-repo/semantics/artículo info:eu-repo/semantics/article info:eu-repo/semantics/publishedVersion https://scielo.conicyt.cl/pdf/parasitol/v60n3-4/art18.pdf http://hdl.handle.net/20.500.12123/6595 0717-7712 http://dx.doi.org/10.4067/S0717-77122005000200018 eng info:eu-repo/semantics/openAccess http://creativecommons.org/licenses/by-nc-sa/4.0/ Creative Commons Attribution-NonCommercial-ShareAlike 4.0 International (CC BY-NC-SA 4.0) application/pdf Sociedad Chilena de Parasitología Parasitología Latinoamericana 60 (3-4) : 192-195 (dic. 2005) |
| spellingShingle | Neospora caninum Enfermedades de los Animales Ganado Bovino Inmunología Animal Diseases Cattle Immunology Moore, Prando Dadin Fate of Neospora-seropositive animals: an opinion |
| title | Fate of Neospora-seropositive animals: an opinion |
| title_full | Fate of Neospora-seropositive animals: an opinion |
| title_fullStr | Fate of Neospora-seropositive animals: an opinion |
| title_full_unstemmed | Fate of Neospora-seropositive animals: an opinion |
| title_short | Fate of Neospora-seropositive animals: an opinion |
| title_sort | fate of neospora seropositive animals an opinion |
| topic | Neospora caninum Enfermedades de los Animales Ganado Bovino Inmunología Animal Diseases Cattle Immunology |
| url | https://scielo.conicyt.cl/pdf/parasitol/v60n3-4/art18.pdf http://hdl.handle.net/20.500.12123/6595 http://dx.doi.org/10.4067/S0717-77122005000200018 |
| work_keys_str_mv | AT mooreprandodadin fateofneosporaseropositiveanimalsanopinion |