engleski

Application of disinfectant in the preparation of the udder for milking

Cleanliness of the udder before milking influences, to a great extent, the hygienic quality of milk as it decreases the possibility of the micro organisms from the skin of the udder to enter the raw during milking.The udder is most often cleaned with water and cloth, while a disinfectant is used only by a small number of breeders. Thus, the purpose of this research was to establish to what extent disinfecting the udder before milking improves its cleanliness in comparison to the usual washing with water and to what extent it decreases the postsecretory pollution of raw milk by the skin of the udder. 10 dairy cows, from the same herd, were included in the research. The animals from the first group had a teats swab taken before preparing the udder for milking and the same was done after the usual washing with water and a cloth. In the second groub the swab was taken from the udder before milking and after the usual washing with water and a cloth after the use of a disinfectant. The disinfectant used was on the basis of the surface active matter, organic acid and hydrogen peroxide (P3 - oxy Foam, Ecolab, d.o.o., Croatia) and the teats were dried with a paper napkin for single use. Milk samples were taken from each group in order to establish the number of bacteria. According to the results obtained, in both groups, a significantly lower number of aerobic mesophyll bacteria was found after applying the udder disinfectant where the application of the disinfectant decreased, more effectively, the number of bacteria on the teats in comparison to those washed with water and the cloth. Besides, the group of cows that had their udder disinfected before milking, had a lower number of bacteria in the milk sample, when compared to the group prepared for milking in the usual way aith water and cloth. The conclusion can be made that disinfection of the udder before milking decreases the number of bacteria on teats in more efficient way than the usual washing with water and thus it should be applied in order to prevent the pollution of milk by the microorganisms from the skin of the udder.

cow; milking; udder disinfection; milk quality

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