engleski

Influence of udder sanitation on hygienic quality of cow milk

The aim of this investigation was to determine the significance of udder disinfection before and after milking on hygienic quality of fresh raw milk in dairy cowherds that were subject to primary udder hygiene with water. Investigation was conducted on 4 farms with different hygienic quality of milk, during which three farms (experimental groups) were selected for the assessment of udder disinfection before and after milking and the fourth farm (control group) continued to implement primary hygiene with water in the preparation of udder before milking. The disinfection in the experimental group prior to milking was performed by immerging teats in a special cup containing active foam based on surface active compounds, organic acids and hydrogen peroxide and after milking by an agent containing skin care substance and 1, 94 % linear dodecyl - benzene sulphonic acid (LDBS). Seven individual samplings of milk were performed on each cow in a period of 3 months for determining microorganisms and somatic cells. The samples were delivered to the laboratory where somatic cell and microorganism numbers/ml of milk was established with the use of standard methods. According to the data from three experimental groups a slight decrease of average somatic cell number and a statistically significant decline of average microorganism number (p<0, 01; p<0, 05) was recorded in fresh raw milk. Unlike this, the somatic cell number in the control group has continually increased reaching the level of statistical significance (p<0, 01), and the microorganism number showed slight oscillations. It was concluded that a change from primary udder hygiene with water to teat disinfection before and after milking significantly decreases average somatic cell and microorganism numbers in fresh raw milk and hence improves hygienic milk quality during a certain time period.

cow ; udder ; sanitation ; microorganisms ; somatic cells ; milk

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