Risk factors for new bovine brucellosis infections in Colombian herds

Bovine brucellosis is a zoonotic disease that causes substantial economic losses and has a strong impact on public health. The main objective of this paper is to determine the risk factors for new infections of Brucella abortus on Colombian cattle farms previously certified as being free of brucello...

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Autores: Cárdenas Contreras, Zaida Liliana|||0000-0002-0535-484X, Peña, Mario, Melo, Oscar, Casal i Fàbrega, Jordi|||0000-0002-6909-9366
Tipo de recurso: artículo
Fecha de publicación:2019
País:España
Institución:Universitat Autònoma de Barcelona
Repositorio:Dipòsit Digital de Documents de la UAB
Idioma:inglés
OAI Identifier:oai:ddd.uab.cat:226387
Acceso en línea:https://ddd.uab.cat/record/226387
https://dx.doi.org/urn:doi:10.1186/s12917-019-1825-9
Access Level:acceso abierto
Palabra clave:Brucella-free herds
Bovine brucellosis infection
Colombia
Risk factors
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spelling Risk factors for new bovine brucellosis infections in Colombian herdsCárdenas Contreras, Zaida Liliana|||0000-0002-0535-484XPeña, MarioMelo, OscarCasal i Fàbrega, Jordi|||0000-0002-6909-9366Brucella-free herdsBovine brucellosis infectionColombiaRisk factorsBovine brucellosis is a zoonotic disease that causes substantial economic losses and has a strong impact on public health. The main objective of this paper is to determine the risk factors for new infections of Brucella abortus on Colombian cattle farms previously certified as being free of brucellosis. A case-control study was conducted by comparing 98 cases (farms certified as brucellosis-free for three or more years but became infected) with 93 controls (farms that remained brucellosis-free during at least the previous three years). The farms were matched by herd size and geographical location (municipality). Information was obtained via a questionnaire completed by veterinary officers through a personal interview with the herd owners. Two-thirds of the herds (67%) were dairy herds, 16% were beef herds, and 17% were dual-purpose (beef and milk) herds. After exploratory univariate analysis, all explanatory variables with a p -value of ≤0.20 were included in a logistic regression model using the forward stepwise method to select the model with the best goodness of fit. The significant risk factors were the replacement of animals from farms not certified as brucellosis-free compared to replacement from certified brucellosis-free farms (OR = 4.84, p -value < 0.001) and beef cattle farms compared to dairy cattle farms (OR = 3.61, p -value = 0.017). When herds with and without artificial insemination were compared, it was observed that farms that used natural breeding with bulls from non-certified herds had a higher risk than farms using artificial insemination (OR = 2.45, p -value = 0.037), but when the bulls came from brucellosis-free farms, farms with natural breeding were less affected (OR = 0.30, p-value = 0.004) than farms using artificial insemination, whether with frozen semen from certified brucellosis-free herds or fresh semen from uncontrolled herds. The latter is commonly sold to neighbouring farms. The government should make efforts to inform farmers about the risks involved in the introduction of semen and replacement heifers from farms that are not certified as brucellosis-free and to establish measures to control these practices. The online version of this article (10.1186/s12917-019-1825-9) contains supplementary material, which is available to authorized users. 22019-01-0120192019-01-01Articlehttp://purl.org/coar/resource_type/c_6501VoRhttp://purl.org/coar/version/c_970fb48d4fbd8a85info:eu-repo/semantics/articleapplication/pdfhttps://ddd.uab.cat/record/226387https://dx.doi.org/urn:doi:10.1186/s12917-019-1825-9reponame:Dipòsit Digital de Documents de la UABinstname:Universitat Autònoma de BarcelonaInglésengopen accesshttp://purl.org/coar/access_right/c_abf2Aquest document està subjecte a una llicència d'ús Creative Commons. Es permet la reproducció total o parcial, la distribució, la comunicació pública de l'obra i la creació d'obres derivades, fins i tot amb finalitats comercials, sempre i quan es reconegui l'autoria de l'obra original.https://creativecommons.org/licenses/by/4.0/info:eu-repo/semantics/openAccessoai:ddd.uab.cat:2263872026-06-06T12:50:31Z
dc.title.none.fl_str_mv Risk factors for new bovine brucellosis infections in Colombian herds
title Risk factors for new bovine brucellosis infections in Colombian herds
spellingShingle Risk factors for new bovine brucellosis infections in Colombian herds
Cárdenas Contreras, Zaida Liliana|||0000-0002-0535-484X
Brucella-free herds
Bovine brucellosis infection
Colombia
Risk factors
title_short Risk factors for new bovine brucellosis infections in Colombian herds
title_full Risk factors for new bovine brucellosis infections in Colombian herds
title_fullStr Risk factors for new bovine brucellosis infections in Colombian herds
title_full_unstemmed Risk factors for new bovine brucellosis infections in Colombian herds
title_sort Risk factors for new bovine brucellosis infections in Colombian herds
dc.creator.none.fl_str_mv Cárdenas Contreras, Zaida Liliana|||0000-0002-0535-484X
Peña, Mario
Melo, Oscar
Casal i Fàbrega, Jordi|||0000-0002-6909-9366
author Cárdenas Contreras, Zaida Liliana|||0000-0002-0535-484X
author_facet Cárdenas Contreras, Zaida Liliana|||0000-0002-0535-484X
Peña, Mario
Melo, Oscar
Casal i Fàbrega, Jordi|||0000-0002-6909-9366
author_role author
author2 Peña, Mario
Melo, Oscar
Casal i Fàbrega, Jordi|||0000-0002-6909-9366
author2_role author
author
author
dc.subject.none.fl_str_mv Brucella-free herds
Bovine brucellosis infection
Colombia
Risk factors
topic Brucella-free herds
Bovine brucellosis infection
Colombia
Risk factors
description Bovine brucellosis is a zoonotic disease that causes substantial economic losses and has a strong impact on public health. The main objective of this paper is to determine the risk factors for new infections of Brucella abortus on Colombian cattle farms previously certified as being free of brucellosis. A case-control study was conducted by comparing 98 cases (farms certified as brucellosis-free for three or more years but became infected) with 93 controls (farms that remained brucellosis-free during at least the previous three years). The farms were matched by herd size and geographical location (municipality). Information was obtained via a questionnaire completed by veterinary officers through a personal interview with the herd owners. Two-thirds of the herds (67%) were dairy herds, 16% were beef herds, and 17% were dual-purpose (beef and milk) herds. After exploratory univariate analysis, all explanatory variables with a p -value of ≤0.20 were included in a logistic regression model using the forward stepwise method to select the model with the best goodness of fit. The significant risk factors were the replacement of animals from farms not certified as brucellosis-free compared to replacement from certified brucellosis-free farms (OR = 4.84, p -value < 0.001) and beef cattle farms compared to dairy cattle farms (OR = 3.61, p -value = 0.017). When herds with and without artificial insemination were compared, it was observed that farms that used natural breeding with bulls from non-certified herds had a higher risk than farms using artificial insemination (OR = 2.45, p -value = 0.037), but when the bulls came from brucellosis-free farms, farms with natural breeding were less affected (OR = 0.30, p-value = 0.004) than farms using artificial insemination, whether with frozen semen from certified brucellosis-free herds or fresh semen from uncontrolled herds. The latter is commonly sold to neighbouring farms. The government should make efforts to inform farmers about the risks involved in the introduction of semen and replacement heifers from farms that are not certified as brucellosis-free and to establish measures to control these practices. The online version of this article (10.1186/s12917-019-1825-9) contains supplementary material, which is available to authorized users.
publishDate 2019
dc.date.none.fl_str_mv 2
2019-01-01
2019
2019-01-01
dc.type.none.fl_str_mv Article
http://purl.org/coar/resource_type/c_6501
VoR
http://purl.org/coar/version/c_970fb48d4fbd8a85
dc.type.openaire.fl_str_mv info:eu-repo/semantics/article
format article
dc.identifier.none.fl_str_mv https://ddd.uab.cat/record/226387
https://dx.doi.org/urn:doi:10.1186/s12917-019-1825-9
url https://ddd.uab.cat/record/226387
https://dx.doi.org/urn:doi:10.1186/s12917-019-1825-9
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
https://creativecommons.org/licenses/by/4.0/
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
https://creativecommons.org/licenses/by/4.0/
eu_rights_str_mv openAccess
dc.format.none.fl_str_mv application/pdf
dc.source.none.fl_str_mv reponame:Dipòsit Digital de Documents de la UAB
instname:Universitat Autònoma de Barcelona
instname_str Universitat Autònoma de Barcelona
reponame_str Dipòsit Digital de Documents de la UAB
collection Dipòsit Digital de Documents de la UAB
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