24 TECNICA mette di effettuare analisi solo quando sono ritenute necessarie, e quindi risparmiare sui costi del reagente. Aldo Calcante TECNICA Contacellule somatiche basato sull’analisi della viscosimetria del latte (da: https://www.lely.com) Somatic cell counts based on milk viscosimetry analysis (from: https://www.lely.com) with healthy milk, there is an increase in sodium and chlorine and a decrease in potassium. The method is relatively simple, but it is not completely reliable since the electrical conductivity of milk can be affected by exogenous factors such as temperature, lactation stage, fat concentration, milking interval and breed. In any case, such measurement carries interesting potential in predictive and diagnostic terms since this parameter can be measured automatically and continuously during milking, thus allowing constant monitoring of the health status of the cow throughout lactation. Another type of sensor, often found in robots, is based on somatic cell counts in a milk sample. This is a rather complex system in which a milk sample is taken during milking and mixed with certain reagents, which stain the somatic cell nucleus. This mix is then fed into the measuring instrument, where the somatic cells are counted using a fluorescence electron microscope, returning their value to the farmer. A further method, always particularly implementable in robots, involves analyzing milk viscosity, which tends to coagulate in the presence of mastitis. Moreover, this principle is already widely exploited by milkers for disease diagnosis. Technologically less complex than the previous one, this system is based on measuring the viscosity of a given volume of milk mixed with a reagent. The detected value is correlated with the number of somatic cells present expressed in cells/ml of milk. The frequency of sampling in both solutions shown varies according to the cow's health status. This allows analyses to be performed only when necessary, thus saving on reagent costs. Aldo Calcante
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