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

Autores
Rodríguez, A. M.; Maresca, Sebastián; Cano, D. B.; Armendano, J. I.; Combessies, G.; Lopéz Valiente, S.; Odriozola, Ernesto Raul; Späth, E.J.L.; Odeón, Anselmo Carlos; Campero, Carlos Manuel; Moore, Dadin Prando
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.
Fil: Rodríguez, A. M.. Instituto Nacional de Tecnología Agropecuaria; Argentina
Fil: Maresca, Sebastián. Instituto Nacional de Tecnología Agropecuaria; Argentina
Fil: Cano, D. B.. Instituto Nacional de Tecnología Agropecuaria; Argentina
Fil: Armendano, J. I.. Universidad Nacional de Mar del Plata; Argentina
Fil: Combessies, G.. Laboratorio Azul; Argentina
Fil: Lopéz Valiente, S.. Instituto Nacional de Tecnología Agropecuaria; Argentina
Fil: Odriozola, Ernesto Raul. Instituto Nacional de Tecnología Agropecuaria; Argentina
Fil: Späth, E.J.L.. Instituto Nacional de Tecnología Agropecuaria; Argentina
Fil: Odeón, Anselmo Carlos. Instituto Nacional de Tecnología Agropecuaria; Argentina
Fil: Campero, Carlos Manuel. Instituto Nacional de Tecnología Agropecuaria; Argentina
Fil: Moore, Dadin Prando. Consejo Nacional de Investigaciones Científicas y Técnicas; Argentina
Materia
Beef Cattle
Neospora Caninum
Serology
Stocking Rate
Transmission
Nivel de accesibilidad
acceso abierto
Condiciones de uso
https://creativecommons.org/licenses/by-nc-sa/2.5/ar/
Repositorio
CONICET Digital (CONICET)
Institución
Consejo Nacional de Investigaciones Científicas y Técnicas
OAI Identificador
oai:ri.conicet.gov.ar:11336/62265
Acceder
id CONICETDig_84094ea98e73ee61486739e72921dda0
oai_identifier_str oai:ri.conicet.gov.ar:11336/62265
network_acronym_str CONICETDig
repository_id_str 3498
network_name_str CONICET Digital (CONICET)
spelling Frequency of Neospora caninum infections in beef cow-calf operations under extensive managementRodríguez, A. M.Maresca, SebastiánCano, D. B.Armendano, J. I.Combessies, G.Lopéz Valiente, S.Odriozola, Ernesto RaulSpäth, E.J.L.Odeón, Anselmo CarlosCampero, Carlos ManuelMoore, Dadin PrandoBeef CattleNeospora CaninumSerologyStocking RateTransmissionhttps://purl.org/becyt/ford/4.3https://purl.org/becyt/ford/4The 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.Fil: Rodríguez, A. M.. Instituto Nacional de Tecnología Agropecuaria; ArgentinaFil: Maresca, Sebastián. Instituto Nacional de Tecnología Agropecuaria; ArgentinaFil: Cano, D. B.. Instituto Nacional de Tecnología Agropecuaria; ArgentinaFil: Armendano, J. I.. Universidad Nacional de Mar del Plata; ArgentinaFil: Combessies, G.. Laboratorio Azul; ArgentinaFil: Lopéz Valiente, S.. Instituto Nacional de Tecnología Agropecuaria; ArgentinaFil: Odriozola, Ernesto Raul. Instituto Nacional de Tecnología Agropecuaria; ArgentinaFil: Späth, E.J.L.. Instituto Nacional de Tecnología Agropecuaria; ArgentinaFil: Odeón, Anselmo Carlos. Instituto Nacional de Tecnología Agropecuaria; ArgentinaFil: Campero, Carlos Manuel. Instituto Nacional de Tecnología Agropecuaria; ArgentinaFil: Moore, Dadin Prando. Consejo Nacional de Investigaciones Científicas y Técnicas; ArgentinaElsevier Science2016-03info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersionhttp://purl.org/coar/resource_type/c_6501info:ar-repo/semantics/articuloapplication/pdfapplication/pdfhttp://hdl.handle.net/11336/62265Rodríguez, A. M.; Maresca, Sebastián; Cano, D. B.; Armendano, J. I.; Combessies, G.; et al.; Frequency of Neospora caninum infections in beef cow-calf operations under extensive management; Elsevier Science; Veterinary Parasitology; 219; 3-2016; 40-430304-4017CONICET DigitalCONICETenginfo:eu-repo/semantics/altIdentifier/doi/10.1016/j.vetpar.2016.02.002info:eu-repo/semantics/altIdentifier/url/https://www.sciencedirect.com/science/article/pii/S0304401716300279info:eu-repo/semantics/openAccesshttps://creativecommons.org/licenses/by-nc-sa/2.5/ar/reponame:CONICET Digital (CONICET)instname:Consejo Nacional de Investigaciones Científicas y Técnicas2025-09-29T09:46:43Zoai:ri.conicet.gov.ar:11336/62265instacron:CONICETInstitucionalhttp://ri.conicet.gov.ar/Organismo científico-tecnológicoNo correspondehttp://ri.conicet.gov.ar/oai/requestdasensio@conicet.gov.ar; lcarlino@conicet.gov.arArgentinaNo correspondeNo correspondeNo correspondeopendoar:34982025-09-29 09:46:44.107CONICET Digital (CONICET) - Consejo Nacional de Investigaciones Científicas y Técnicasfalse
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
Rodríguez, A. M.
Beef Cattle
Neospora Caninum
Serology
Stocking Rate
Transmission
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 Rodríguez, A. M.
Maresca, Sebastián
Cano, D. B.
Armendano, J. I.
Combessies, G.
Lopéz Valiente, S.
Odriozola, Ernesto Raul
Späth, E.J.L.
Odeón, Anselmo Carlos
Campero, Carlos Manuel
Moore, Dadin Prando
author Rodríguez, A. M.
author_facet Rodríguez, A. M.
Maresca, Sebastián
Cano, D. B.
Armendano, J. I.
Combessies, G.
Lopéz Valiente, S.
Odriozola, Ernesto Raul
Späth, E.J.L.
Odeón, Anselmo Carlos
Campero, Carlos Manuel
Moore, Dadin Prando
author_role author
author2 Maresca, Sebastián
Cano, D. B.
Armendano, J. I.
Combessies, G.
Lopéz Valiente, S.
Odriozola, Ernesto Raul
Späth, E.J.L.
Odeón, Anselmo Carlos
Campero, Carlos Manuel
Moore, Dadin Prando
author2_role author
author
author
author
author
author
author
author
author
author
dc.subject.none.fl_str_mv Beef Cattle
Neospora Caninum
Serology
Stocking Rate
Transmission
topic Beef Cattle
Neospora Caninum
Serology
Stocking Rate
Transmission
purl_subject.fl_str_mv https://purl.org/becyt/ford/4.3
https://purl.org/becyt/ford/4
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.
Fil: Rodríguez, A. M.. Instituto Nacional de Tecnología Agropecuaria; Argentina
Fil: Maresca, Sebastián. Instituto Nacional de Tecnología Agropecuaria; Argentina
Fil: Cano, D. B.. Instituto Nacional de Tecnología Agropecuaria; Argentina
Fil: Armendano, J. I.. Universidad Nacional de Mar del Plata; Argentina
Fil: Combessies, G.. Laboratorio Azul; Argentina
Fil: Lopéz Valiente, S.. Instituto Nacional de Tecnología Agropecuaria; Argentina
Fil: Odriozola, Ernesto Raul. Instituto Nacional de Tecnología Agropecuaria; Argentina
Fil: Späth, E.J.L.. Instituto Nacional de Tecnología Agropecuaria; Argentina
Fil: Odeón, Anselmo Carlos. Instituto Nacional de Tecnología Agropecuaria; Argentina
Fil: Campero, Carlos Manuel. Instituto Nacional de Tecnología Agropecuaria; Argentina
Fil: Moore, Dadin Prando. 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
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 http://hdl.handle.net/11336/62265
Rodríguez, A. M.; Maresca, Sebastián; Cano, D. B.; Armendano, J. I.; Combessies, G.; et al.; Frequency of Neospora caninum infections in beef cow-calf operations under extensive management; Elsevier Science; Veterinary Parasitology; 219; 3-2016; 40-43
0304-4017
CONICET Digital
CONICET
url http://hdl.handle.net/11336/62265
identifier_str_mv Rodríguez, A. M.; Maresca, Sebastián; Cano, D. B.; Armendano, J. I.; Combessies, G.; et al.; Frequency of Neospora caninum infections in beef cow-calf operations under extensive management; Elsevier Science; Veterinary Parasitology; 219; 3-2016; 40-43
0304-4017
CONICET Digital
CONICET
dc.language.none.fl_str_mv eng
language eng
dc.relation.none.fl_str_mv info:eu-repo/semantics/altIdentifier/doi/10.1016/j.vetpar.2016.02.002
info:eu-repo/semantics/altIdentifier/url/https://www.sciencedirect.com/science/article/pii/S0304401716300279
dc.rights.none.fl_str_mv info:eu-repo/semantics/openAccess
https://creativecommons.org/licenses/by-nc-sa/2.5/ar/
eu_rights_str_mv openAccess
rights_invalid_str_mv https://creativecommons.org/licenses/by-nc-sa/2.5/ar/
dc.format.none.fl_str_mv application/pdf
application/pdf
dc.publisher.none.fl_str_mv Elsevier Science
publisher.none.fl_str_mv Elsevier Science
dc.source.none.fl_str_mv reponame:CONICET Digital (CONICET)
instname:Consejo Nacional de Investigaciones Científicas y Técnicas
reponame_str CONICET Digital (CONICET)
collection CONICET Digital (CONICET)
instname_str Consejo Nacional de Investigaciones Científicas y Técnicas
repository.name.fl_str_mv CONICET Digital (CONICET) - Consejo Nacional de Investigaciones Científicas y Técnicas
repository.mail.fl_str_mv dasensio@conicet.gov.ar; lcarlino@conicet.gov.ar
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score 13.070432

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