Variation of cow’s milk composition across different daily milking sessions and feasibility of using a composite sampling

Bondan, Carlos; Folchini, Jéssica Aneris; Noro, Mirela; Machado, Karine Martini; Muhls, Eduardo; González, Félix Hilario Díaz

doi:10.1590/0103-8478cr20181004

Cited by 5 publications

(1 citation statement)

References 11 publications

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“…On the other hand, in the afternoon milking SCC was higher. Generally, the highest milk production occurs in the morning milking due to longer milking intervals, and lower SCC values are observed due to the dilution effect (BONDAN et al, 2019). Furthermore, the milking interval influences milk quality and production aspects.…”

Section: Discussionmentioning

confidence: 99%

Evaluation of forestripping milk and its effects on milk quality

Santos

Castelani

Mitsunaga

et al. 2022

AVB

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Consumers demand for food safety affects dairy industry, restraining the sector to adapt to milk quality parameters established by legislation, such as somatic cell count (SCC) and standard plate count (SPC). Good agricultural practices have positive impact over these parameters, especially Forestripping Milk (FSM), which consists of observing the first milk streams collected in a dark-bottomed mug for identification of clinical mastitis. These first milk streams have high somatic cells count and bacteria. Therefore, the aim of this study was to evaluate the characteristics of milk from FSM, such as SCC and SPC values, and its impacts on milk quality of the cooling tank through simulating contamination. Fourteen dairy farms and one experimental farm were evaluated for SCC and SPC parameters of FSM. It was observed that there was no statistically significant difference for SCC and SPC between milk samples from the cooling tank and cooling tank simulating the inclusion of milk from FSM. Statistically significant difference for somatic cell score (SCS) and SPC was observed when tanks were classified by SCC. In addition, difference in SCS was observed between morning and afternoon milking. The collection of first milk streams can contribute to decrease in SCC and SPC of milk in the cooling tank. FSM must be practiced by all dairy farmers as milking management, to assist in clinical mastitis diagnosis and improve milk quality.

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Section: Discussionmentioning

confidence: 99%

Evaluation of forestripping milk and its effects on milk quality

Santos

Castelani

Mitsunaga

et al. 2022

AVB

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Milk composition and health status of quarters adjacent to an on-farm protocol-treated clinical-mastitis gland

Paixão,

Costa,

de Souza

et al. 2024

Anim. Prod. Sci.

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Context The hypothesis of interdependency among cows’ mammary glands has been shown, and quarters adjacent to glands with clinical mastitis may have their composition and health status impaired. Aims The main focus of this study was to compare foremilk composition (fat, total protein, lactose, solids non-fat (SNF), and chloride) and health status (somatic cell count (SCC), differential leukocytes) of healthy mammary glands adjacent to a gland previously treated (on average, 24 days after treatment, varying from 20 to 39 days) for clinical mastitis with foremilk samples of healthy mammary glands of healthy cows. Our previous study compared these traits (foremilk composition and health status) between healthy mammary glands adjacent to a mastitis-infected quarter and healthy mammary glands from healthy cows (no clinical mastitis) immediately after the identification of mastitis on case quarters. Methods The study was designed as a prospective case–control study and the enrolled cows (cases and controls) were matched by days in milk and parity. Case cows (n = 50) were defined as cows that previously had a single quarter infected with mild or moderate clinical mastitis, and which were treated according to an on-farm protocol 1 day after mastitis identification. Control cows (n = 50) were defined as cows that had not suffered clinical mastitis in the current lactation. Foremilk samples from each quarter of case and control cows were collected so as to assess concentrations of fat, total protein, lactose, SCC, and SNF, conduct microbiological analyses, and determine the concentration of chloride and differential leukocyte counts. Multivariate linear regression and logistic regression analyses were performed to assess possible associations of milk-composition and health-status traits between quarter types (case or control cows). Key results On average, 24 days after the treatment of the case quarter began, milk composition (fat, lactose, SNF, and chloride) and some health status (lymphocyte and macrophage counts) of adjacent quarters returned to similar levels as in control quarters, while total protein, SCC, and neutrophils remained greater for adjacent quarters. No effect of quarter position or microbiological results of enrolled quarters were identified. Conclusions Our results suggested that at least 20 days (average of 24 days) after an episode of clinical mastitis in a neighbouring gland, adjacent quarters were still recovering from this mastitis episode, and we conclude that interdependency of quarters is a physiological systemic two-way immune response route, and each particular milk component has a different behaviour after clinical mastitis. Implications Our results suggest that clinical mastitis is far more costly for producers and industry than has been previously reported. Bovine mastitis is the disease that causes the most economical losses to dairy farmers, including veterinary expenses, milk disposal, loss of production and reduction of animal pregnancies. The milk composition of the mammary quarter affected by mastitis is not the only one compromised, because the milk quality of the entire udder is also affected. A period of 20 days is not enough for animals to fully recover from a case of udder inflammation. Mastitis is more costly to producers and industry than has been previously reported.

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Evaluation Of Morning And Evening Milk Traits in Some Dairy Animals in Erbil City

Izzadeen

Mustafa

2021

TJAS

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The study was done to compare Awassi ewes and Holstein cow’s milk in morning and evening period, in a private animal project in Erbil/ Iraq. The physical properties (pH, specific gravity and freezing point °c) of milk samples which recorded insignificant differences between the morning and evening period of Awassi ewes and Holstein cow’s milk, as well as milk has flavor in ewes, while it increased in cow’s milk. The average yield of cows' milk increased in the morning compared to the evening, while the milk yield of ewes showed an insignificant difference between the morning and evening periods. Fat and fat percentage: protein ratio had decreased in the morning milk compared to the evening milk, instead of in cows the morning milk contained high fat (%) and fat: protein ratio compared to the evening, otherwise, Sheep's milk increased the rates of morning milk protein, lactose and SNF compared to the evening milk, there were insignificant differences between cows’ morning and evening milk protein, lactose and SNF percentages. At the animal or species level, sheep's milk outperformed cow's milk in chemical composition.

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Variation of cow’s milk composition across different daily milking sessions and feasibility of using a composite sampling

Cited by 5 publications

References 11 publications

Evaluation of forestripping milk and its effects on milk quality

Evaluation of forestripping milk and its effects on milk quality

Milk composition and health status of quarters adjacent to an on-farm protocol-treated clinical-mastitis gland

Evaluation Of Morning And Evening Milk Traits in Some Dairy Animals in Erbil City

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