Influence of sub-clinical mastitis on milk quality in cows

Federal State Budgetary Educational Institution of Higher Education "Russian State Agrarian Univer-sity - Moscow Agricultural Academy named after K.A. Timiryazev", Moscow, Russia

^* Corresponding author: S.Fedotov@rgaumcxa.ru

Abstract

Abstract. All animals underwent express-diagnosis of udder health with the California Mastitis-Test and based on the result obtained was formed two groups of animals to 15 animals in each group. Animals of the first group had the dubious reaction to California express method, and the second animal – weakly positive. The total protein content in the I-th group w s 3,23%, while the II-nd group chang d slightly and was 3,21%, but decre s d the content of casein in the II-nd g oup by 6,7% and amounted to 2,50%. In turn, increased elk serum proteins in the II-nd group and was 0,65 % albumin and 0,06 % new globulins. Den ity of milk cows first group also conform to the standards as provided by the gue ts, and the cows from s cond group slightly below normal and reached 1026,5 kg/m³. Somatic cells p r 534 tys./sm³ higher in animals II-nd group compared with the first group, whi h indicates the presence of inflamm tion in the udd r.