Influence of different milking systems on hygienic and microbiological quality of raw cow milk
2019
Tahmaz, Sabahudin | Škaljić, Selim | Rakita, Nermin | Dimitrijević, Aleksandra | Zlatanović, Ivan
On majority of farms in Bosnia and Herzegovina milking of cows is performed on mobile and semi-stationary machines, whereas on a small number of farms it is done with stationary machines. Milking conditions in cubicles do not provide satisfactory hygienic conditions in comparison to stationary milking systems. Therefore, the focus of the research was put on establishment of influences of preparation of cow for the milking process, the milking process with different types of systems, and hygienic and microbiological quality of raw cow milk. The obtained results indicate a significantly lower number of micro-organisms in the case of a stationary system (103,166 ± 51,291) in comparison to a semi-stationary (246,200 ± 190,047) and mobile system (267,500 ± 235,732) for mechanized milking. The research also established a difference of contents of microorganisms between average morning (163,200±112,718) and evening (248,044±238,051) mil king, where the statistical significance P<0.05. The number of somatic cells with the mobile milking system totaled, 220,400±228,444, semi-stationary system 230,600±215,146 and stationary system 226,150±214,445. The experiment was done with the same cows and balanced feeding. The average number of somatic cells for all three milking systems was of E class and totaled 132,018 SCC/ml. The average number of micro-organisms was outside the E Class and totaled 159,510 CFU/ml. The obtained results lead to the conclusion that the type of milking system affects hygienic quality of raw cow milk, and that it is necessary to invest efforts in education of farmers and better technical equipping.
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