UDC 636.034
DOI 10.36461/NP.2025.74.2.005

MILK QUALITY OF HOLSTEIN COWS AFTER POST-MILKING UDDER DISINFECTION
K.A. Lekomtsev, Postgraduate, G.Yu. Berezkina, Doctor of Agricultural Sciences, Associate Professor,
K.E. Shkarupa, Candidate of Agricultural Sciences
Federal State Budgetary Educational Institution higher education “Udmurt State Agrarian University”, Izhevsk, Russia tel.89127693432, e-mail: This email address is being protected from spambots. You need JavaScript enabled to view it.

The study of disinfection impact on post-milking udder treatment should be carefully analyzed, since veterinary, zootechnical and economic indicators of dairy production industry depend on it. The current research is aimed at evaluating milk quality indicators of Holstein cows after post-milking teat disinfection. For the research the scientists examined cows of the Holstein breed for adder treatment. Cattle was divided into three groups of 45 heads: control group – Violit lactic acid-based disinfectors were used for their udder treatment; group I with Algalit iodine-based disinfectors treatment and group II with Priolit polyguanidine-based disinfectors. Milk samples were collected during the control milking after disinfectors on days 30, 60 and 90. The udder condition was assessed visually. Standard methods were implemented to determine the physicochemical and microbiological indicators of milk quality. Bacterial contamination of milk on the farm during the year was at a level of 0.92 to 0.11 × 105 CFU/cm3, somatic cells in cows' milk were at a level of 2.01 to 3.10 × 105. Significant changes in the physicochemical indicators of milk quality were not found. After three months of udder treatment with disinfectors: control group (Violit) – 1 cow with clinical mastitis, group I (Algalit) – 100% healthy cows, group II (Priolite) – 2 cows with subclinical mastitis. When using all the means for udder treatment with disinfectors, the teats condition was improved.
Keywords: Holstein cows, udder treatment disinfectors Violet, Algalit, Priolit, milk quality, mastitis prevention.

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