奶山羊体细胞数 I:与感染性和非感染性因素的关系。

IF 2.3 2区 农林科学 Q1 VETERINARY SCIENCES BMC Veterinary Research Pub Date : 2024-11-06 DOI:10.1186/s12917-024-04348-6
Marit Smistad, Ragnhild Aabøe Inglingstad, Liv Sølverød, Siv Skeie, Bjørn Gunnar Hansen
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引用次数: 0

摘要

背景:乳房内感染会对牛奶质量、动物福利和乳业生产率产生负面影响。体细胞计数(SCC)是检测乳房内感染引起的亚临床乳腺炎最常用的筛查工具。在奶山羊中,SCC 受非感染因素的影响很大,这使得解释变得复杂。本研究论文旨在确定奶山羊 SCC、乳房内感染和非感染因素(包括奇数、季节、泌乳阶段和产奶量)之间的关联。在这项纵向研究中,对来自挪威四个奶山羊牧场的451只奶山羊进行了细菌学和SCC采样,在两个泌乳期进行了多达九次采样。从挪威山羊记录系统中检索了诸如胎次、产奶量和泌乳阶段等因素:最常见的乳房病原菌是卡氏葡萄球菌(6.8%)、沃纳里葡萄球菌(6.3%)和表皮葡萄球菌(3.8%),它们对SCC的影响轻微但显著。在 3.6% 的半乳房中检测到金黄色葡萄球菌,对 SCC 有重大影响。胎次、泌乳阶段、季节和产奶量对 SCC 有显著影响:本研究强调,由金黄色葡萄球菌引起的乳房内感染,以及诸如胎次增加和牧场季节性影响等因素,对 SCC 有重大影响。了解这些关键因素对于改善乳房健康管理和提高山羊奶生产中的牛奶质量至关重要。
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Somatic cell count in dairy goats I: association with infectious and non-infectious factors.

Background: Intramammary infections negatively affect milk quality, animal welfare and productivity in the dairy industry. Somatic cell count (SCC) is the most used screening tool to detect subclinical mastitis caused by intramammary infections. In dairy goats, SCC is greatly influenced by non-infectious factors, which complicates the interpretation. The aim of this research paper was to determine the association between SCC, intramammary infections and non-infectious factors including parity, season, lactation stage, and milk yield in dairy goats. In this longitudinal study, 451 goats from four Norwegian dairy goat herds were sampled for bacteriology and SCC up to nine times during two lactations. Factors like parity, milk yield, and stage of lactation were retrieved from the Norwegian goat recording system.

Results: The most prevalent udder pathogen findings were Staphylococcus caprae (6.8%), Staphylococcus warneri (6.3%), and Staphylococcus epidermidis (3.8%), all of which had a mild but significant impact on SCC. Staphylococcus aureus was detected in 3.6% of the udder halves and had a major effect on SCC. Parity, stage of lactation, season, and milk yield significantly influenced SCC.

Conclusions: This study highlights that intramammary infections caused by Staphylococcus aureus, along with factors such as increasing parity and the seasonal effects of pasturing, significantly influence the SCC. Understanding these key contributors is essential for improving udder health management and improving milk quality in goat milk production.

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来源期刊
BMC Veterinary Research
BMC Veterinary Research VETERINARY SCIENCES-
CiteScore
4.80
自引率
3.80%
发文量
420
审稿时长
3-6 weeks
期刊介绍: BMC Veterinary Research is an open access, peer-reviewed journal that considers articles on all aspects of veterinary science and medicine, including the epidemiology, diagnosis, prevention and treatment of medical conditions of domestic, companion, farm and wild animals, as well as the biomedical processes that underlie their health.
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