Associations of somatic cell count with milk yield and reproductive performance in grazing dairy cows

Poor udder health status can have a detrimental effect on milk yield and reproductive performance, leading to reductions in the dairy farm profit. The objective of this retrospective longitudinal study was to assess the associations of somatic cell count (SCC) with daily milk yield and reproductive...

Descripción completa

Guardado en:
Detalles Bibliográficos
Autores principales: Rearte, Ramiro, Corva, Santiago Gerardo, Sota, Rodolfo Luzbel de la, Lacau de Mengido, Isabel María, Giuliodori, Mauricio Javier
Formato: Articulo
Lenguaje:Inglés
Publicado: 2022
Materias:
Veterinaria
somatic cell count
milk production
reproductive efficiency
grazing dairy cow
Acceso en línea:http://sedici.unlp.edu.ar/handle/10915/154897
Aporte de:
SEDICI (UNLP) de Universidad Nacional de La Plata
id I19-R120-10915-154897
record_format dspace
spelling I19-R120-10915-1548972023-07-04T04:53:40Z http://sedici.unlp.edu.ar/handle/10915/154897 issn:0022-0302 Associations of somatic cell count with milk yield and reproductive performance in grazing dairy cows Rearte, Ramiro Corva, Santiago Gerardo Sota, Rodolfo Luzbel de la Lacau de Mengido, Isabel María Giuliodori, Mauricio Javier 2022-07 2023-07-03T12:55:44Z en Veterinaria somatic cell count milk production reproductive efficiency grazing dairy cow Poor udder health status can have a detrimental effect on milk yield and reproductive performance, leading to reductions in the dairy farm profit. The objective of this retrospective longitudinal study was to assess the associations of somatic cell count (SCC) with daily milk yield and reproductive performance. A database with 1,930,376 lactations from 867 Argentinean grazing dairy herds records collected for 14 years was used. The association of the evolution of SCC (healthy vs. new case vs. cured vs. chronic; with 150,000 SCC/mL as threshold) and of the severity of SCC [mild (150,000– 400,000 SCC/mL) vs. moderate (400,000–1,000,000 SCC/mL) vs. severe (>1,000,000 SCC/mL)] with the odds for conception were estimated. Finally, the associations of the linear score of SCC (LS-SCC) with daily milk yield were estimated depending on parity and milk production quartile. The odds ratios (CI 95%) for conception at first service were 0.921 (0.902–0.941), 0.866 (0.848–0.884), and 0.842 (0.826–0.859) for the new case, cured, and chronic cows compared with healthy cows, respectively. Also, the odds ratios (CI 95%) for conception were 0.902 (0.881–0.925), 0.837 (0.808–0.866) and 0.709 (0.683–0.736) for mild, moderate and severe cases compared with healthy cows, respectively. An increase of one point of LS-SCC was associated with decreases of 0.349, 0.539, and 0.676 kg in daily milk yield for first-, second-, and third-lactation cows, respectively. In conclusion, SCC is negatively associated with the risk for conception and with daily milk yield in grazing dairy cows. This negative relationship with conception is higher when SCC increase occurs after the service date and it is influenced by severity of mastitis, and in the case of milk yield, the negative association is influenced by parity, milk production quartile, and severity of mastitis. Facultad de Ciencias Veterinarias Articulo Articulo http://creativecommons.org/licenses/by/4.0/ Creative Commons Attribution 4.0 International (CC BY 4.0) application/pdf 6251-6260
institution Universidad Nacional de La Plata
institution_str I-19
repository_str R-120
collection SEDICI (UNLP)
language Inglés
topic Veterinaria
somatic cell count
milk production
reproductive efficiency
grazing dairy cow
spellingShingle Veterinaria
somatic cell count
milk production
reproductive efficiency
grazing dairy cow
Rearte, Ramiro
Corva, Santiago Gerardo
Sota, Rodolfo Luzbel de la
Lacau de Mengido, Isabel María
Giuliodori, Mauricio Javier
Associations of somatic cell count with milk yield and reproductive performance in grazing dairy cows
topic_facet Veterinaria
somatic cell count
milk production
reproductive efficiency
grazing dairy cow
description Poor udder health status can have a detrimental effect on milk yield and reproductive performance, leading to reductions in the dairy farm profit. The objective of this retrospective longitudinal study was to assess the associations of somatic cell count (SCC) with daily milk yield and reproductive performance. A database with 1,930,376 lactations from 867 Argentinean grazing dairy herds records collected for 14 years was used. The association of the evolution of SCC (healthy vs. new case vs. cured vs. chronic; with 150,000 SCC/mL as threshold) and of the severity of SCC [mild (150,000– 400,000 SCC/mL) vs. moderate (400,000–1,000,000 SCC/mL) vs. severe (>1,000,000 SCC/mL)] with the odds for conception were estimated. Finally, the associations of the linear score of SCC (LS-SCC) with daily milk yield were estimated depending on parity and milk production quartile. The odds ratios (CI 95%) for conception at first service were 0.921 (0.902–0.941), 0.866 (0.848–0.884), and 0.842 (0.826–0.859) for the new case, cured, and chronic cows compared with healthy cows, respectively. Also, the odds ratios (CI 95%) for conception were 0.902 (0.881–0.925), 0.837 (0.808–0.866) and 0.709 (0.683–0.736) for mild, moderate and severe cases compared with healthy cows, respectively. An increase of one point of LS-SCC was associated with decreases of 0.349, 0.539, and 0.676 kg in daily milk yield for first-, second-, and third-lactation cows, respectively. In conclusion, SCC is negatively associated with the risk for conception and with daily milk yield in grazing dairy cows. This negative relationship with conception is higher when SCC increase occurs after the service date and it is influenced by severity of mastitis, and in the case of milk yield, the negative association is influenced by parity, milk production quartile, and severity of mastitis.
format Articulo
Articulo
author Rearte, Ramiro
Corva, Santiago Gerardo
Sota, Rodolfo Luzbel de la
Lacau de Mengido, Isabel María
Giuliodori, Mauricio Javier
author_facet Rearte, Ramiro
Corva, Santiago Gerardo
Sota, Rodolfo Luzbel de la
Lacau de Mengido, Isabel María
Giuliodori, Mauricio Javier
author_sort Rearte, Ramiro
title Associations of somatic cell count with milk yield and reproductive performance in grazing dairy cows
title_short Associations of somatic cell count with milk yield and reproductive performance in grazing dairy cows
title_full Associations of somatic cell count with milk yield and reproductive performance in grazing dairy cows
title_fullStr Associations of somatic cell count with milk yield and reproductive performance in grazing dairy cows
title_full_unstemmed Associations of somatic cell count with milk yield and reproductive performance in grazing dairy cows
title_sort associations of somatic cell count with milk yield and reproductive performance in grazing dairy cows
publishDate 2022
url http://sedici.unlp.edu.ar/handle/10915/154897
work_keys_str_mv AT rearteramiro associationsofsomaticcellcountwithmilkyieldandreproductiveperformanceingrazingdairycows
AT corvasantiagogerardo associationsofsomaticcellcountwithmilkyieldandreproductiveperformanceingrazingdairycows
AT sotarodolfoluzbeldela associationsofsomaticcellcountwithmilkyieldandreproductiveperformanceingrazingdairycows
AT lacaudemengidoisabelmaria associationsofsomaticcellcountwithmilkyieldandreproductiveperformanceingrazingdairycows
AT giuliodorimauriciojavier associationsofsomaticcellcountwithmilkyieldandreproductiveperformanceingrazingdairycows
_version_ 1770804884427243520

Ejemplares similares