An investigation of risk factors for two successive cases of clinical mastitis in the same lactation
Autor(a) principal: | |
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Data de Publicação: | 2016 |
Outros Autores: | , , |
Tipo de documento: | Artigo |
Idioma: | eng |
Título da fonte: | Repositório Institucional da UNESP |
Texto Completo: | http://dx.doi.org/10.1016/j.livsci.2016.10.010 http://hdl.handle.net/11449/173730 |
Resumo: | The objective of this study was to identify risk factors for the occurrence of two successive cases of clinical mastitis (CM). Two farms were visited monthly during 10 months. Milk samples were collected from all cases of CM that occurred during the study. Cows were observed prospectively from the beginning of the study and a case cow was defined when she experienced the second case of CM within the same lactation. For each case cow, 3 control cows matched by days in milk (DIM) were randomly selected from the cohort of cows who did not experience CM. On each visit day, a series of udder and teat characteristics were recorded during milking time: teat-end hyperkeratosis scoring, milking ease scoring, teat length and diameter, teat-to-ground distance, and udder position in relation to the hock. A total of 113 case cows and 324 control cows were used for analyses. The median time to occurrence of the first case of CM was 84 DIM and the median interval between the first and second cases of CM was 39 days. Of all second cases, 49.6% (N=55) occurred in the same mammary gland. Of these 55 cases, 29.1% had identical milk culture results from both first and second cases. Most cases of CM were caused by coliforms and environmental streptococci. Teat-to-ground distance, teat-end hyperkeratosis, udder position in relation to the hock, milking ease, parity, and milk production at the first test of lactation were individually associated with the occurrence of two successive cases of CM. Of all explanatory variables, 3 remained in the final multivariable model. The odds of two successive cases of CM were 3.7 times greater for cows who were “very easy to milk”, as compared with cows who were “difficult to milk”. Cows who had their udders below the hock, and those of parity >2 were 3.6 and 2.5 times more likely to experience two successive cases of CM, as compared with cows whose udder was positioned above the hock, and cows of parity 1, respectively. Findings of this study highlight the importance of teat and udder characteristics as risk factors for two successive cases of CM. Further investigations are needed to elucidate the role of the teat canal in preventing mastitis for modern cows that have been selected for increased milk production, shorter teats, and greater milk flow rates. |
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An investigation of risk factors for two successive cases of clinical mastitis in the same lactationClinical mastitisDairy cowsEpidemiologyMilk qualityMilking easeTeat-end hyperkeratosisThe objective of this study was to identify risk factors for the occurrence of two successive cases of clinical mastitis (CM). Two farms were visited monthly during 10 months. Milk samples were collected from all cases of CM that occurred during the study. Cows were observed prospectively from the beginning of the study and a case cow was defined when she experienced the second case of CM within the same lactation. For each case cow, 3 control cows matched by days in milk (DIM) were randomly selected from the cohort of cows who did not experience CM. On each visit day, a series of udder and teat characteristics were recorded during milking time: teat-end hyperkeratosis scoring, milking ease scoring, teat length and diameter, teat-to-ground distance, and udder position in relation to the hock. A total of 113 case cows and 324 control cows were used for analyses. The median time to occurrence of the first case of CM was 84 DIM and the median interval between the first and second cases of CM was 39 days. Of all second cases, 49.6% (N=55) occurred in the same mammary gland. Of these 55 cases, 29.1% had identical milk culture results from both first and second cases. Most cases of CM were caused by coliforms and environmental streptococci. Teat-to-ground distance, teat-end hyperkeratosis, udder position in relation to the hock, milking ease, parity, and milk production at the first test of lactation were individually associated with the occurrence of two successive cases of CM. Of all explanatory variables, 3 remained in the final multivariable model. The odds of two successive cases of CM were 3.7 times greater for cows who were “very easy to milk”, as compared with cows who were “difficult to milk”. Cows who had their udders below the hock, and those of parity >2 were 3.6 and 2.5 times more likely to experience two successive cases of CM, as compared with cows whose udder was positioned above the hock, and cows of parity 1, respectively. Findings of this study highlight the importance of teat and udder characteristics as risk factors for two successive cases of CM. Further investigations are needed to elucidate the role of the teat canal in preventing mastitis for modern cows that have been selected for increased milk production, shorter teats, and greater milk flow rates.Fundação de Amparo à Pesquisa do Estado de São Paulo (FAPESP)Department of Veterinary Hygiene and Public Health UNESP Univ Estadual Paulista Distrito de Rubiao JuniorDepartment of Veterinary Hygiene and Public Health UNESP Univ Estadual Paulista Distrito de Rubiao JuniorFAPESP: 2013/03482-6Universidade Estadual Paulista (Unesp)Pantoja, J. C.F. [UNESP]Almeida, A. P. [UNESP]dos Santos, B. [UNESP]Rossi, R. S. [UNESP]2018-12-11T17:07:28Z2018-12-11T17:07:28Z2016-12-01info:eu-repo/semantics/publishedVersioninfo:eu-repo/semantics/article10-16application/pdfhttp://dx.doi.org/10.1016/j.livsci.2016.10.010Livestock Science, v. 194, p. 10-16.1871-1413http://hdl.handle.net/11449/17373010.1016/j.livsci.2016.10.0102-s2.0-849943822962-s2.0-84994382296.pdfScopusreponame:Repositório Institucional da UNESPinstname:Universidade Estadual Paulista (UNESP)instacron:UNESPengLivestock Science0,730info:eu-repo/semantics/openAccess2023-11-02T06:11:53Zoai:repositorio.unesp.br:11449/173730Repositório InstitucionalPUBhttp://repositorio.unesp.br/oai/requestopendoar:29462023-11-02T06:11:53Repositório Institucional da UNESP - Universidade Estadual Paulista (UNESP)false |
dc.title.none.fl_str_mv |
An investigation of risk factors for two successive cases of clinical mastitis in the same lactation |
title |
An investigation of risk factors for two successive cases of clinical mastitis in the same lactation |
spellingShingle |
An investigation of risk factors for two successive cases of clinical mastitis in the same lactation Pantoja, J. C.F. [UNESP] Clinical mastitis Dairy cows Epidemiology Milk quality Milking ease Teat-end hyperkeratosis |
title_short |
An investigation of risk factors for two successive cases of clinical mastitis in the same lactation |
title_full |
An investigation of risk factors for two successive cases of clinical mastitis in the same lactation |
title_fullStr |
An investigation of risk factors for two successive cases of clinical mastitis in the same lactation |
title_full_unstemmed |
An investigation of risk factors for two successive cases of clinical mastitis in the same lactation |
title_sort |
An investigation of risk factors for two successive cases of clinical mastitis in the same lactation |
author |
Pantoja, J. C.F. [UNESP] |
author_facet |
Pantoja, J. C.F. [UNESP] Almeida, A. P. [UNESP] dos Santos, B. [UNESP] Rossi, R. S. [UNESP] |
author_role |
author |
author2 |
Almeida, A. P. [UNESP] dos Santos, B. [UNESP] Rossi, R. S. [UNESP] |
author2_role |
author author author |
dc.contributor.none.fl_str_mv |
Universidade Estadual Paulista (Unesp) |
dc.contributor.author.fl_str_mv |
Pantoja, J. C.F. [UNESP] Almeida, A. P. [UNESP] dos Santos, B. [UNESP] Rossi, R. S. [UNESP] |
dc.subject.por.fl_str_mv |
Clinical mastitis Dairy cows Epidemiology Milk quality Milking ease Teat-end hyperkeratosis |
topic |
Clinical mastitis Dairy cows Epidemiology Milk quality Milking ease Teat-end hyperkeratosis |
description |
The objective of this study was to identify risk factors for the occurrence of two successive cases of clinical mastitis (CM). Two farms were visited monthly during 10 months. Milk samples were collected from all cases of CM that occurred during the study. Cows were observed prospectively from the beginning of the study and a case cow was defined when she experienced the second case of CM within the same lactation. For each case cow, 3 control cows matched by days in milk (DIM) were randomly selected from the cohort of cows who did not experience CM. On each visit day, a series of udder and teat characteristics were recorded during milking time: teat-end hyperkeratosis scoring, milking ease scoring, teat length and diameter, teat-to-ground distance, and udder position in relation to the hock. A total of 113 case cows and 324 control cows were used for analyses. The median time to occurrence of the first case of CM was 84 DIM and the median interval between the first and second cases of CM was 39 days. Of all second cases, 49.6% (N=55) occurred in the same mammary gland. Of these 55 cases, 29.1% had identical milk culture results from both first and second cases. Most cases of CM were caused by coliforms and environmental streptococci. Teat-to-ground distance, teat-end hyperkeratosis, udder position in relation to the hock, milking ease, parity, and milk production at the first test of lactation were individually associated with the occurrence of two successive cases of CM. Of all explanatory variables, 3 remained in the final multivariable model. The odds of two successive cases of CM were 3.7 times greater for cows who were “very easy to milk”, as compared with cows who were “difficult to milk”. Cows who had their udders below the hock, and those of parity >2 were 3.6 and 2.5 times more likely to experience two successive cases of CM, as compared with cows whose udder was positioned above the hock, and cows of parity 1, respectively. Findings of this study highlight the importance of teat and udder characteristics as risk factors for two successive cases of CM. Further investigations are needed to elucidate the role of the teat canal in preventing mastitis for modern cows that have been selected for increased milk production, shorter teats, and greater milk flow rates. |
publishDate |
2016 |
dc.date.none.fl_str_mv |
2016-12-01 2018-12-11T17:07:28Z 2018-12-11T17:07:28Z |
dc.type.status.fl_str_mv |
info:eu-repo/semantics/publishedVersion |
dc.type.driver.fl_str_mv |
info:eu-repo/semantics/article |
format |
article |
status_str |
publishedVersion |
dc.identifier.uri.fl_str_mv |
http://dx.doi.org/10.1016/j.livsci.2016.10.010 Livestock Science, v. 194, p. 10-16. 1871-1413 http://hdl.handle.net/11449/173730 10.1016/j.livsci.2016.10.010 2-s2.0-84994382296 2-s2.0-84994382296.pdf |
url |
http://dx.doi.org/10.1016/j.livsci.2016.10.010 http://hdl.handle.net/11449/173730 |
identifier_str_mv |
Livestock Science, v. 194, p. 10-16. 1871-1413 10.1016/j.livsci.2016.10.010 2-s2.0-84994382296 2-s2.0-84994382296.pdf |
dc.language.iso.fl_str_mv |
eng |
language |
eng |
dc.relation.none.fl_str_mv |
Livestock Science 0,730 |
dc.rights.driver.fl_str_mv |
info:eu-repo/semantics/openAccess |
eu_rights_str_mv |
openAccess |
dc.format.none.fl_str_mv |
10-16 application/pdf |
dc.source.none.fl_str_mv |
Scopus reponame:Repositório Institucional da UNESP instname:Universidade Estadual Paulista (UNESP) instacron:UNESP |
instname_str |
Universidade Estadual Paulista (UNESP) |
instacron_str |
UNESP |
institution |
UNESP |
reponame_str |
Repositório Institucional da UNESP |
collection |
Repositório Institucional da UNESP |
repository.name.fl_str_mv |
Repositório Institucional da UNESP - Universidade Estadual Paulista (UNESP) |
repository.mail.fl_str_mv |
|
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1799964794431733760 |