Frequency of Neospora caninum infections in beef cow–calf operations under extensive management

Autores
Rodriguez, Alejandro Martin; Maresca, Sebastian; Cano, Dora Beatriz; Armendano, Joaquín Ignacio; Combessies, Gustavo; Lopez Valiente, Sebastian; Odriozola, Ernesto Raul; Spath, Ernesto Juan; Odeon, Anselmo Carlos; Campero, Carlos Manuel; Moore, Prando Dadin
Año de publicación
2016
Idioma
inglés
Tipo de recurso
artículo
Estado
versión publicada
Descripción
The aim of this study was to evaluate the frequencies of Neospora caninum horizontal and vertical transmissions in beef cow–calf operations under three different extensive management systems: group A: 0.75 head per hectare pasturing on natural grass; group B: 1.1 head per hectare on natural grass and improved cultured pastures; and group C: 2 head per hectare on natural grass, improved cultured pasture and whole corn silage. Serum samples from 72 multiparous cows assigned to each beef cow–calf operations were obtained every 3 months during 2 years. A group of 30 replacement heifers from each group were tested similarly since they were 10–21 months old. Twenty four, 20 and 34 calves from groups A, B and C respectively, were bled before colostrum intake and again 6 months later. The samples were analyzed by indirect fluorescence antibody test (IFAT) for detection of total IgG against N. caninum at a serological titre ≥200 for multiparous cows and replacement heifers, and a serological titre ≥25 for calves. Serum samples from seropositive cows were assessed by ELISA to evaluate the avidity of their specific antibodies. There were no differences in the proportion of seropositive cows from groups A, B and C at the beginning of the trial (p > 0.05). Interestingly, the lowest serological titres in seropositive cows from all groups were observed during the first trimester (p < 0.05). Although seropositive cows had medium to high avidity antibodies, suggesting chronic infection; seroconversion associated with low antibody avidity was found in 2, 3 and 3 seropositive cows from groups A, B and C. All replacement heifers remained seronegative. No abortions were recorded but 2, 1, and 2 calves from groups A, B and C were seropositive before colostrum intake, respectively. Seropositive calves born from cows having intermediate or high avidity remained with the same serostatus at 6 months of age. Even under varying extensive management conditions, both N. caninum horizontal and vertical transmission methods do occur in beef cow–calf operations.
EEA Cuenca del Salado
Fil: Rodriguez, Alejandro Martin. Instituto Nacional de Tecnología Agropecuaria (INTA). Estación Experimental Agropecuaria Cuenca del Salado; Argentina
Fil: Maresca, Sebastian. Instituto Nacional de Tecnología Agropecuaria (INTA). Estación Experimental Agropecuaria Cuenca del Salado; Argentina
Fil: Cano, Dora Beatriz. Instituto Nacional de Tecnología Agropecuaria (INTA). Estación Experimental Agropecuaria Balcarce; Argentina
Fil: Armendano, Joaquín Ignacio. Universidad Nacional de Mar del Plata; Argentina
Fil: Combessies, G. Laboratorio Azul; Argentina
Fil: Lopez Valiente, Sebastian. Instituto Nacional de Tecnología Agropecuaria (INTA). Estación Experimental Agropecuaria Cuenca del Salado; Argentina
Fil: Odriozola, Ernesto Raul. Instituto Nacional de Tecnología Agropecuaria (INTA). Estación Experimental Agropecuaria Balcarce; Argentina
Fil: Spath, Ernesto Juan. Instituto Nacional de Tecnología Agropecuaria (INTA). Estación Experimental Agropecuaria Balcarce; Argentina
Fil: Odeon, Anselmo Carlos. Instituto Nacional de Tecnología Agropecuaria (INTA). Estación Experimental Agropecuaria Balcarce; Argentina
Fil: Campero, Carlos Manuel. Instituto Nacional de Tecnología Agropecuaria (INTA). Estación Experimental Agropecuaria Balcarce; Argentina
Fil: Moore, Prando Dadin. Consejo Nacional de Investigaciones Científicas y Técnicas; Argentina
Fuente
Veterinary Parasitology 219 : 40-43 (March 2016)
Materia
Ganado de Carne
Ternero
Neospora caninum
Manejo del Ganado
Serología
Enfermedades de los Animales
Beef Cattle
Calves
Livestock Management
Serology
Animal Diseases
Nivel de accesibilidad
acceso restringido
Condiciones de uso
Repositorio
INTA Digital (INTA)
Institución
Instituto Nacional de Tecnología Agropecuaria
OAI Identificador
oai:localhost:20.500.12123/2738
Acceder
id INTADig_235a0a7882be78916fff9a4c843d8c9f
oai_identifier_str oai:localhost:20.500.12123/2738
network_acronym_str INTADig
repository_id_str l
network_name_str INTA Digital (INTA)
spelling Frequency of Neospora caninum infections in beef cow–calf operations under extensive managementRodriguez, Alejandro MartinMaresca, SebastianCano, Dora BeatrizArmendano, Joaquín IgnacioCombessies, GustavoLopez Valiente, SebastianOdriozola, Ernesto RaulSpath, Ernesto JuanOdeon, Anselmo CarlosCampero, Carlos ManuelMoore, Prando DadinGanado de CarneTerneroNeospora caninumManejo del GanadoSerologíaEnfermedades de los AnimalesBeef CattleCalvesLivestock ManagementSerologyAnimal DiseasesThe aim of this study was to evaluate the frequencies of Neospora caninum horizontal and vertical transmissions in beef cow–calf operations under three different extensive management systems: group A: 0.75 head per hectare pasturing on natural grass; group B: 1.1 head per hectare on natural grass and improved cultured pastures; and group C: 2 head per hectare on natural grass, improved cultured pasture and whole corn silage. Serum samples from 72 multiparous cows assigned to each beef cow–calf operations were obtained every 3 months during 2 years. A group of 30 replacement heifers from each group were tested similarly since they were 10–21 months old. Twenty four, 20 and 34 calves from groups A, B and C respectively, were bled before colostrum intake and again 6 months later. The samples were analyzed by indirect fluorescence antibody test (IFAT) for detection of total IgG against N. caninum at a serological titre ≥200 for multiparous cows and replacement heifers, and a serological titre ≥25 for calves. Serum samples from seropositive cows were assessed by ELISA to evaluate the avidity of their specific antibodies. There were no differences in the proportion of seropositive cows from groups A, B and C at the beginning of the trial (p > 0.05). Interestingly, the lowest serological titres in seropositive cows from all groups were observed during the first trimester (p < 0.05). Although seropositive cows had medium to high avidity antibodies, suggesting chronic infection; seroconversion associated with low antibody avidity was found in 2, 3 and 3 seropositive cows from groups A, B and C. All replacement heifers remained seronegative. No abortions were recorded but 2, 1, and 2 calves from groups A, B and C were seropositive before colostrum intake, respectively. Seropositive calves born from cows having intermediate or high avidity remained with the same serostatus at 6 months of age. Even under varying extensive management conditions, both N. caninum horizontal and vertical transmission methods do occur in beef cow–calf operations.EEA Cuenca del SaladoFil: Rodriguez, Alejandro Martin. Instituto Nacional de Tecnología Agropecuaria (INTA). Estación Experimental Agropecuaria Cuenca del Salado; ArgentinaFil: Maresca, Sebastian. Instituto Nacional de Tecnología Agropecuaria (INTA). Estación Experimental Agropecuaria Cuenca del Salado; ArgentinaFil: Cano, Dora Beatriz. Instituto Nacional de Tecnología Agropecuaria (INTA). Estación Experimental Agropecuaria Balcarce; ArgentinaFil: Armendano, Joaquín Ignacio. Universidad Nacional de Mar del Plata; ArgentinaFil: Combessies, G. Laboratorio Azul; ArgentinaFil: Lopez Valiente, Sebastian. Instituto Nacional de Tecnología Agropecuaria (INTA). Estación Experimental Agropecuaria Cuenca del Salado; ArgentinaFil: Odriozola, Ernesto Raul. Instituto Nacional de Tecnología Agropecuaria (INTA). Estación Experimental Agropecuaria Balcarce; ArgentinaFil: Spath, Ernesto Juan. Instituto Nacional de Tecnología Agropecuaria (INTA). Estación Experimental Agropecuaria Balcarce; ArgentinaFil: Odeon, Anselmo Carlos. Instituto Nacional de Tecnología Agropecuaria (INTA). Estación Experimental Agropecuaria Balcarce; ArgentinaFil: Campero, Carlos Manuel. Instituto Nacional de Tecnología Agropecuaria (INTA). Estación Experimental Agropecuaria Balcarce; ArgentinaFil: Moore, Prando Dadin. Consejo Nacional de Investigaciones Científicas y Técnicas; Argentina2018-07-06T13:35:38Z2018-07-06T13:35:38Z2016-03-30info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersionhttp://purl.org/coar/resource_type/c_6501info:ar-repo/semantics/articuloapplication/pdfhttps://www.sciencedirect.com/science/article/pii/S0304401716300279http://hdl.handle.net/20.500.12123/27380304-4017https://doi.org/10.1016/j.vetpar.2016.02.002Veterinary Parasitology 219 : 40-43 (March 2016)reponame:INTA Digital (INTA)instname:Instituto Nacional de Tecnología Agropecuariaenginfo:eu-repo/semantics/restrictedAccess2025-10-16T09:29:13Zoai:localhost:20.500.12123/2738instacron:INTAInstitucionalhttp://repositorio.inta.gob.ar/Organismo científico-tecnológicoNo correspondehttp://repositorio.inta.gob.ar/oai/requesttripaldi.nicolas@inta.gob.arArgentinaNo correspondeNo correspondeNo correspondeopendoar:l2025-10-16 09:29:13.725INTA Digital (INTA) - Instituto Nacional de Tecnología Agropecuariafalse
dc.title.none.fl_str_mv Frequency of Neospora caninum infections in beef cow–calf operations under extensive management
title Frequency of Neospora caninum infections in beef cow–calf operations under extensive management
spellingShingle Frequency of Neospora caninum infections in beef cow–calf operations under extensive management
Rodriguez, Alejandro Martin
Ganado de Carne
Ternero
Neospora caninum
Manejo del Ganado
Serología
Enfermedades de los Animales
Beef Cattle
Calves
Livestock Management
Serology
Animal Diseases
title_short Frequency of Neospora caninum infections in beef cow–calf operations under extensive management
title_full Frequency of Neospora caninum infections in beef cow–calf operations under extensive management
title_fullStr Frequency of Neospora caninum infections in beef cow–calf operations under extensive management
title_full_unstemmed Frequency of Neospora caninum infections in beef cow–calf operations under extensive management
title_sort Frequency of Neospora caninum infections in beef cow–calf operations under extensive management
dc.creator.none.fl_str_mv Rodriguez, Alejandro Martin
Maresca, Sebastian
Cano, Dora Beatriz
Armendano, Joaquín Ignacio
Combessies, Gustavo
Lopez Valiente, Sebastian
Odriozola, Ernesto Raul
Spath, Ernesto Juan
Odeon, Anselmo Carlos
Campero, Carlos Manuel
Moore, Prando Dadin
author Rodriguez, Alejandro Martin
author_facet Rodriguez, Alejandro Martin
Maresca, Sebastian
Cano, Dora Beatriz
Armendano, Joaquín Ignacio
Combessies, Gustavo
Lopez Valiente, Sebastian
Odriozola, Ernesto Raul
Spath, Ernesto Juan
Odeon, Anselmo Carlos
Campero, Carlos Manuel
Moore, Prando Dadin
author_role author
author2 Maresca, Sebastian
Cano, Dora Beatriz
Armendano, Joaquín Ignacio
Combessies, Gustavo
Lopez Valiente, Sebastian
Odriozola, Ernesto Raul
Spath, Ernesto Juan
Odeon, Anselmo Carlos
Campero, Carlos Manuel
Moore, Prando Dadin
author2_role author
author
author
author
author
author
author
author
author
author
dc.subject.none.fl_str_mv Ganado de Carne
Ternero
Neospora caninum
Manejo del Ganado
Serología
Enfermedades de los Animales
Beef Cattle
Calves
Livestock Management
Serology
Animal Diseases
topic Ganado de Carne
Ternero
Neospora caninum
Manejo del Ganado
Serología
Enfermedades de los Animales
Beef Cattle
Calves
Livestock Management
Serology
Animal Diseases
dc.description.none.fl_txt_mv The aim of this study was to evaluate the frequencies of Neospora caninum horizontal and vertical transmissions in beef cow–calf operations under three different extensive management systems: group A: 0.75 head per hectare pasturing on natural grass; group B: 1.1 head per hectare on natural grass and improved cultured pastures; and group C: 2 head per hectare on natural grass, improved cultured pasture and whole corn silage. Serum samples from 72 multiparous cows assigned to each beef cow–calf operations were obtained every 3 months during 2 years. A group of 30 replacement heifers from each group were tested similarly since they were 10–21 months old. Twenty four, 20 and 34 calves from groups A, B and C respectively, were bled before colostrum intake and again 6 months later. The samples were analyzed by indirect fluorescence antibody test (IFAT) for detection of total IgG against N. caninum at a serological titre ≥200 for multiparous cows and replacement heifers, and a serological titre ≥25 for calves. Serum samples from seropositive cows were assessed by ELISA to evaluate the avidity of their specific antibodies. There were no differences in the proportion of seropositive cows from groups A, B and C at the beginning of the trial (p > 0.05). Interestingly, the lowest serological titres in seropositive cows from all groups were observed during the first trimester (p < 0.05). Although seropositive cows had medium to high avidity antibodies, suggesting chronic infection; seroconversion associated with low antibody avidity was found in 2, 3 and 3 seropositive cows from groups A, B and C. All replacement heifers remained seronegative. No abortions were recorded but 2, 1, and 2 calves from groups A, B and C were seropositive before colostrum intake, respectively. Seropositive calves born from cows having intermediate or high avidity remained with the same serostatus at 6 months of age. Even under varying extensive management conditions, both N. caninum horizontal and vertical transmission methods do occur in beef cow–calf operations.
EEA Cuenca del Salado
Fil: Rodriguez, Alejandro Martin. Instituto Nacional de Tecnología Agropecuaria (INTA). Estación Experimental Agropecuaria Cuenca del Salado; Argentina
Fil: Maresca, Sebastian. Instituto Nacional de Tecnología Agropecuaria (INTA). Estación Experimental Agropecuaria Cuenca del Salado; Argentina
Fil: Cano, Dora Beatriz. Instituto Nacional de Tecnología Agropecuaria (INTA). Estación Experimental Agropecuaria Balcarce; Argentina
Fil: Armendano, Joaquín Ignacio. Universidad Nacional de Mar del Plata; Argentina
Fil: Combessies, G. Laboratorio Azul; Argentina
Fil: Lopez Valiente, Sebastian. Instituto Nacional de Tecnología Agropecuaria (INTA). Estación Experimental Agropecuaria Cuenca del Salado; Argentina
Fil: Odriozola, Ernesto Raul. Instituto Nacional de Tecnología Agropecuaria (INTA). Estación Experimental Agropecuaria Balcarce; Argentina
Fil: Spath, Ernesto Juan. Instituto Nacional de Tecnología Agropecuaria (INTA). Estación Experimental Agropecuaria Balcarce; Argentina
Fil: Odeon, Anselmo Carlos. Instituto Nacional de Tecnología Agropecuaria (INTA). Estación Experimental Agropecuaria Balcarce; Argentina
Fil: Campero, Carlos Manuel. Instituto Nacional de Tecnología Agropecuaria (INTA). Estación Experimental Agropecuaria Balcarce; Argentina
Fil: Moore, Prando Dadin. Consejo Nacional de Investigaciones Científicas y Técnicas; Argentina
description The aim of this study was to evaluate the frequencies of Neospora caninum horizontal and vertical transmissions in beef cow–calf operations under three different extensive management systems: group A: 0.75 head per hectare pasturing on natural grass; group B: 1.1 head per hectare on natural grass and improved cultured pastures; and group C: 2 head per hectare on natural grass, improved cultured pasture and whole corn silage. Serum samples from 72 multiparous cows assigned to each beef cow–calf operations were obtained every 3 months during 2 years. A group of 30 replacement heifers from each group were tested similarly since they were 10–21 months old. Twenty four, 20 and 34 calves from groups A, B and C respectively, were bled before colostrum intake and again 6 months later. The samples were analyzed by indirect fluorescence antibody test (IFAT) for detection of total IgG against N. caninum at a serological titre ≥200 for multiparous cows and replacement heifers, and a serological titre ≥25 for calves. Serum samples from seropositive cows were assessed by ELISA to evaluate the avidity of their specific antibodies. There were no differences in the proportion of seropositive cows from groups A, B and C at the beginning of the trial (p > 0.05). Interestingly, the lowest serological titres in seropositive cows from all groups were observed during the first trimester (p < 0.05). Although seropositive cows had medium to high avidity antibodies, suggesting chronic infection; seroconversion associated with low antibody avidity was found in 2, 3 and 3 seropositive cows from groups A, B and C. All replacement heifers remained seronegative. No abortions were recorded but 2, 1, and 2 calves from groups A, B and C were seropositive before colostrum intake, respectively. Seropositive calves born from cows having intermediate or high avidity remained with the same serostatus at 6 months of age. Even under varying extensive management conditions, both N. caninum horizontal and vertical transmission methods do occur in beef cow–calf operations.
publishDate 2016
dc.date.none.fl_str_mv 2016-03-30
2018-07-06T13:35:38Z
2018-07-06T13:35:38Z
dc.type.none.fl_str_mv info:eu-repo/semantics/article
info:eu-repo/semantics/publishedVersion
http://purl.org/coar/resource_type/c_6501
info:ar-repo/semantics/articulo
format article
status_str publishedVersion
dc.identifier.none.fl_str_mv https://www.sciencedirect.com/science/article/pii/S0304401716300279
http://hdl.handle.net/20.500.12123/2738
0304-4017
https://doi.org/10.1016/j.vetpar.2016.02.002
url https://www.sciencedirect.com/science/article/pii/S0304401716300279
http://hdl.handle.net/20.500.12123/2738
https://doi.org/10.1016/j.vetpar.2016.02.002
identifier_str_mv 0304-4017
dc.language.none.fl_str_mv eng
language eng
dc.rights.none.fl_str_mv info:eu-repo/semantics/restrictedAccess
eu_rights_str_mv restrictedAccess
dc.format.none.fl_str_mv application/pdf
dc.source.none.fl_str_mv Veterinary Parasitology 219 : 40-43 (March 2016)
reponame:INTA Digital (INTA)
instname:Instituto Nacional de Tecnología Agropecuaria
reponame_str INTA Digital (INTA)
collection INTA Digital (INTA)
instname_str Instituto Nacional de Tecnología Agropecuaria
repository.name.fl_str_mv INTA Digital (INTA) - Instituto Nacional de Tecnología Agropecuaria
repository.mail.fl_str_mv tripaldi.nicolas@inta.gob.ar
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score 12.712165

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