EFFECT OF SOMATIC CELLS ON THE PHYSIC-CHEMICAL AND MICROBIOAL PROPERTIES OF RAW MILK IN DIFFERENT SEASONS
|Yarabbi H1*, Mortazavi A2, Mehraban M3 and Sepehri N4
|Corresponding Author: Yarabbi H, Tel: (+98)9155060155, E-mail: [email protected]|
|Received: 30 March 2014 Accepted: 04 May 2014|
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Mastitis disease is an inflammatory response in milk-producing glands in animals that is considered the most important factor in increasing the somatic cells counts. This disease causes enormous economic losses to the dairy industries. Increasing of microbial load of milk and decreasing of lactose, fat, casein and minerals like calcium and potassium and also increasing the somatic cell count will occur by this disease. Due to the damaging effects of Mastitis disease and its prevalence, this study aimed to investigate the effect of increasing somatic cell on composition and chemical - microbial features of raw milk in different seasons of a year. In this study 240 samples of milk were randomly selected from 10 milk collection centers and industrial farms in Khorasan Razavi Province (Iran) and examined. Significant difference was found between the number of somatic cells in summer and other seasons and the highest number of somatic cells was indicated in August. The results showed that the amount of fat, lactose, somatic cells count was decreased by increasing acidity. Positive significant relationship was observed between the number of somatic cell with PH, electrical conductivity and microbial load.