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Prevalence and risk factors associated with high somatic cell count in Chinese dairy herds

This study aimed to (1) estimate the prevalence of cow-level high somatic cell count (SCC) in Chinese dairy herds and (2) identify potential factors associated with cow- and herd-level SCC variables. The monthly data on dairy herd improvement were collected from a total of 131 dairy herds in 11 prov...

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Autores principales: Deng, Zhaoju, Wang, Kun, Xu, Chuang, Cao, Jie, Ma, Chong
Formato: Online Artículo Texto
Lenguaje:English
Publicado: Frontiers Media S.A. 2022
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC9668248/
https://www.ncbi.nlm.nih.gov/pubmed/36406082
http://dx.doi.org/10.3389/fvets.2022.967275
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author Deng, Zhaoju
Wang, Kun
Xu, Chuang
Cao, Jie
Ma, Chong
author_facet Deng, Zhaoju
Wang, Kun
Xu, Chuang
Cao, Jie
Ma, Chong
author_sort Deng, Zhaoju
collection PubMed
description This study aimed to (1) estimate the prevalence of cow-level high somatic cell count (SCC) in Chinese dairy herds and (2) identify potential factors associated with cow- and herd-level SCC variables. The monthly data on dairy herd improvement were collected from a total of 131 dairy herds in 11 provinces in China in 2019. Mixed models were constructed using the cow composite milk SCC and the variance of cow SCC as dependent variables separately and parity, seasons, days in milk (DIM), herd size, and farm types (family-owned vs. company-owned) as fixed effects, accounting for the nested random herd and cow effect. We used negative binomial regression using herd-level SCC-related variables, namely, monthly proportion of high SCC, monthly proportion of new high SCC, monthly proportion of chronic high SCC, and monthly proportion of new chronic high SCC as dependent variables separately against seasons, herd size, and farm types with the random herd effect. The overall average prevalence of high SCCs for each month per farm was 0.26 (2.5–97.5% quantile: 0–0.56). Company-owned farms performed better in herd SCC management. Seasons were significantly associated with all the aforementioned variables, and summer and autumn were the seasons associated with worse outcomes in herd SCCs. This study is the first to assess high SCC in a large number of Chinese dairy herds, which is useful for farms to tailor the on-farm mastitis control programs in China.
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spelling pubmed-96682482022-11-17 Prevalence and risk factors associated with high somatic cell count in Chinese dairy herds Deng, Zhaoju Wang, Kun Xu, Chuang Cao, Jie Ma, Chong Front Vet Sci Veterinary Science This study aimed to (1) estimate the prevalence of cow-level high somatic cell count (SCC) in Chinese dairy herds and (2) identify potential factors associated with cow- and herd-level SCC variables. The monthly data on dairy herd improvement were collected from a total of 131 dairy herds in 11 provinces in China in 2019. Mixed models were constructed using the cow composite milk SCC and the variance of cow SCC as dependent variables separately and parity, seasons, days in milk (DIM), herd size, and farm types (family-owned vs. company-owned) as fixed effects, accounting for the nested random herd and cow effect. We used negative binomial regression using herd-level SCC-related variables, namely, monthly proportion of high SCC, monthly proportion of new high SCC, monthly proportion of chronic high SCC, and monthly proportion of new chronic high SCC as dependent variables separately against seasons, herd size, and farm types with the random herd effect. The overall average prevalence of high SCCs for each month per farm was 0.26 (2.5–97.5% quantile: 0–0.56). Company-owned farms performed better in herd SCC management. Seasons were significantly associated with all the aforementioned variables, and summer and autumn were the seasons associated with worse outcomes in herd SCCs. This study is the first to assess high SCC in a large number of Chinese dairy herds, which is useful for farms to tailor the on-farm mastitis control programs in China. Frontiers Media S.A. 2022-11-02 /pmc/articles/PMC9668248/ /pubmed/36406082 http://dx.doi.org/10.3389/fvets.2022.967275 Text en Copyright © 2022 Deng, Wang, Xu, Cao and Ma. https://creativecommons.org/licenses/by/4.0/This is an open-access article distributed under the terms of the Creative Commons Attribution License (CC BY). The use, distribution or reproduction in other forums is permitted, provided the original author(s) and the copyright owner(s) are credited and that the original publication in this journal is cited, in accordance with accepted academic practice. No use, distribution or reproduction is permitted which does not comply with these terms.
spellingShingle Veterinary Science
Deng, Zhaoju
Wang, Kun
Xu, Chuang
Cao, Jie
Ma, Chong
Prevalence and risk factors associated with high somatic cell count in Chinese dairy herds
title Prevalence and risk factors associated with high somatic cell count in Chinese dairy herds
title_full Prevalence and risk factors associated with high somatic cell count in Chinese dairy herds
title_fullStr Prevalence and risk factors associated with high somatic cell count in Chinese dairy herds
title_full_unstemmed Prevalence and risk factors associated with high somatic cell count in Chinese dairy herds
title_short Prevalence and risk factors associated with high somatic cell count in Chinese dairy herds
title_sort prevalence and risk factors associated with high somatic cell count in chinese dairy herds
topic Veterinary Science
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC9668248/
https://www.ncbi.nlm.nih.gov/pubmed/36406082
http://dx.doi.org/10.3389/fvets.2022.967275
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