Dynamics of Neospora caninum-Associated Abortions in a Dairy Sheep Flock and Results of a Test-and-Cull Control Programme

Neospora caninum is an apicomplexan parasite that can cause abortions and perinatal mortality in sheep. Although ovine neosporosis has been described worldwide, there is a lack of information about the relationship between N. caninum serostatus and the reproductive performance. In this study, we des...

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Autores: Sánchez Sánchez, Roberto, Vázquez Calvo, Ángela, Fernández Escobar, Mercedes, Regidor Cerrillo, Javier, Benavides, Julio, Gutiérrez, Jorge, Gutierrez Expósito, Daniel, Crespo Ramos, Francisco José, Ortega Mora, Luis Miguel, Álvarez García, Gema
Formato: artículo
Fecha de publicación:2021
País:España
Recursos:Universidad Complutense de Madrid (UCM)
Repositorio:Docta Complutense
Idioma:inglés
OAI Identifier:oai:docta.ucm.es:20.500.14352/5022
Acesso em linha:https://hdl.handle.net/20.500.14352/5022
Access Level:acceso abierto
Palavra-chave:Neospora caninum
abortion
sheep
transmission route
control programme
Ganado ovino
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spelling Dynamics of Neospora caninum-Associated Abortions in a Dairy Sheep Flock and Results of a Test-and-Cull Control ProgrammeSánchez Sánchez, RobertoVázquez Calvo, ÁngelaFernández Escobar, MercedesRegidor Cerrillo, JavierBenavides, JulioGutiérrez, JorgeGutierrez Expósito, DanielCrespo Ramos, Francisco JoséOrtega Mora, Luis MiguelÁlvarez García, GemaNeospora caninumabortionsheeptransmission routecontrol programmeGanado ovinoNeospora caninum is an apicomplexan parasite that can cause abortions and perinatal mortality in sheep. Although ovine neosporosis has been described worldwide, there is a lack of information about the relationship between N. caninum serostatus and the reproductive performance. In this study, we described the infection dynamics in a dairy sheep flock with an abortion rate up to 25% and a N. caninum seroprevalence of 32%. Abortions were recorded in 36% and 9% of seropositive and seronegative sheep, respectively. Seropositive sheep were more likely to abort twice (OR = 4.44) or three or more times (OR = 10.13) than seronegative sheep. Endogenous transplacental transmission was the main route of transmission since 86% of seropositive sheep had seropositive offspring. Within dams that had any abortion, seropositive sheep were more likely than seronegative ones to have female descendants that aborted (OR = 8.12). The slight increase in seropositivity with the age, the low percentage of animals with postnatal seroconversion or with low avidity antibodies, and the seropositivity of one flock dog, indicated that horizontal transmission might have some relevance in this flock. A control programme based on selective culling of seropositive sheep and replacement with seronegative animals was effective in reducing the abortion rate to 7.2%.MPDIUniversidad Complutense de Madrid20212021-11-2020212021-11-20journal articlehttp://purl.org/coar/resource_type/c_6501info:eu-repo/semantics/articleapplication/pdfhttps://hdl.handle.net/20.500.14352/5022reponame:Docta Complutenseinstname:Universidad Complutense de Madrid (UCM)Inglésengopen accesshttp://purl.org/coar/access_right/c_abf2Atribución 3.0 Españahttps://creativecommons.org/licenses/by/3.0/es/info:eu-repo/semantics/openAccessoai:docta.ucm.es:20.500.14352/50222026-06-02T12:44:21Z
dc.title.none.fl_str_mv Dynamics of Neospora caninum-Associated Abortions in a Dairy Sheep Flock and Results of a Test-and-Cull Control Programme
title Dynamics of Neospora caninum-Associated Abortions in a Dairy Sheep Flock and Results of a Test-and-Cull Control Programme
spellingShingle Dynamics of Neospora caninum-Associated Abortions in a Dairy Sheep Flock and Results of a Test-and-Cull Control Programme
Sánchez Sánchez, Roberto
Neospora caninum
abortion
sheep
transmission route
control programme
Ganado ovino
title_short Dynamics of Neospora caninum-Associated Abortions in a Dairy Sheep Flock and Results of a Test-and-Cull Control Programme
title_full Dynamics of Neospora caninum-Associated Abortions in a Dairy Sheep Flock and Results of a Test-and-Cull Control Programme
title_fullStr Dynamics of Neospora caninum-Associated Abortions in a Dairy Sheep Flock and Results of a Test-and-Cull Control Programme
title_full_unstemmed Dynamics of Neospora caninum-Associated Abortions in a Dairy Sheep Flock and Results of a Test-and-Cull Control Programme
title_sort Dynamics of Neospora caninum-Associated Abortions in a Dairy Sheep Flock and Results of a Test-and-Cull Control Programme
dc.creator.none.fl_str_mv Sánchez Sánchez, Roberto
Vázquez Calvo, Ángela
Fernández Escobar, Mercedes
Regidor Cerrillo, Javier
Benavides, Julio
Gutiérrez, Jorge
Gutierrez Expósito, Daniel
Crespo Ramos, Francisco José
Ortega Mora, Luis Miguel
Álvarez García, Gema
author Sánchez Sánchez, Roberto
author_facet Sánchez Sánchez, Roberto
Vázquez Calvo, Ángela
Fernández Escobar, Mercedes
Regidor Cerrillo, Javier
Benavides, Julio
Gutiérrez, Jorge
Gutierrez Expósito, Daniel
Crespo Ramos, Francisco José
Ortega Mora, Luis Miguel
Álvarez García, Gema
author_role author
author2 Vázquez Calvo, Ángela
Fernández Escobar, Mercedes
Regidor Cerrillo, Javier
Benavides, Julio
Gutiérrez, Jorge
Gutierrez Expósito, Daniel
Crespo Ramos, Francisco José
Ortega Mora, Luis Miguel
Álvarez García, Gema
author2_role author
author
author
author
author
author
author
author
author
dc.contributor.none.fl_str_mv Universidad Complutense de Madrid
dc.subject.none.fl_str_mv Neospora caninum
abortion
sheep
transmission route
control programme
Ganado ovino
topic Neospora caninum
abortion
sheep
transmission route
control programme
Ganado ovino
description Neospora caninum is an apicomplexan parasite that can cause abortions and perinatal mortality in sheep. Although ovine neosporosis has been described worldwide, there is a lack of information about the relationship between N. caninum serostatus and the reproductive performance. In this study, we described the infection dynamics in a dairy sheep flock with an abortion rate up to 25% and a N. caninum seroprevalence of 32%. Abortions were recorded in 36% and 9% of seropositive and seronegative sheep, respectively. Seropositive sheep were more likely to abort twice (OR = 4.44) or three or more times (OR = 10.13) than seronegative sheep. Endogenous transplacental transmission was the main route of transmission since 86% of seropositive sheep had seropositive offspring. Within dams that had any abortion, seropositive sheep were more likely than seronegative ones to have female descendants that aborted (OR = 8.12). The slight increase in seropositivity with the age, the low percentage of animals with postnatal seroconversion or with low avidity antibodies, and the seropositivity of one flock dog, indicated that horizontal transmission might have some relevance in this flock. A control programme based on selective culling of seropositive sheep and replacement with seronegative animals was effective in reducing the abortion rate to 7.2%.
publishDate 2021
dc.date.none.fl_str_mv 2021
2021-11-20
2021
2021-11-20
dc.type.none.fl_str_mv journal article
http://purl.org/coar/resource_type/c_6501
dc.type.openaire.fl_str_mv info:eu-repo/semantics/article
format article
dc.identifier.none.fl_str_mv https://hdl.handle.net/20.500.14352/5022
url https://hdl.handle.net/20.500.14352/5022
dc.language.none.fl_str_mv Inglés
eng
language_invalid_str_mv Inglés
language eng
dc.rights.none.fl_str_mv open access
http://purl.org/coar/access_right/c_abf2
Atribución 3.0 España
https://creativecommons.org/licenses/by/3.0/es/
dc.rights.openaire.fl_str_mv info:eu-repo/semantics/openAccess
rights_invalid_str_mv open access
http://purl.org/coar/access_right/c_abf2
Atribución 3.0 España
https://creativecommons.org/licenses/by/3.0/es/
eu_rights_str_mv openAccess
dc.format.none.fl_str_mv application/pdf
dc.publisher.none.fl_str_mv MPDI
publisher.none.fl_str_mv MPDI
dc.source.none.fl_str_mv reponame:Docta Complutense
instname:Universidad Complutense de Madrid (UCM)
instname_str Universidad Complutense de Madrid (UCM)
reponame_str Docta Complutense
collection Docta Complutense
repository.name.fl_str_mv
repository.mail.fl_str_mv
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score 15.301603

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