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The purpose of this paper was to investigate the relationship between of bovine mastitis and the nutrientsconcentration in milk. Seventy-two Holstein cows were divided into 2 groups: G1 - clinically healthy cows (n = 36) and G2- subclinical mastitis cows (n = 36). Both groups of animals were subjected to the California Mastitis Test – CMT, thesomatic cell counting, and the microbiological examination. The concentrations of fat, matter protein, copper, iron,manganese and zinc in the milk sample were determined. The recorded data were statistically analyzed and presentedthe following means and standard-deviations, according to groups 1 and 2: fat (%) 1.251 ± 0.676 and 1.662 ± 1.166 (p> 0.05); protein (%) 3.373 ± 0.428 and 3.411 ± 0.348 (p > 0.05); somatic cell counting (after logarithmic basis) 1.694 ±0.632 and 2.909 ± 0.424 (p < 0.0001); copper (ppm) 0.043 ± 0.015 and 0.047 ± 0.019 (p > 0.05); iron (ppm) 0.159 ± 0.047and 0.191 ± 0.063 (p < 0.05); manganese (ppm) 0.040 ± 0.010 and 0.036 ± 0.010 (p > 0.05) and zinc (ppm) 3.938 ±1.221 and 3.658 ± 1.212 (p > 0.05). It was concluded that there were significant differences in the levels of SCC and ironbetween the two groups of animals.<p><p>A proposta do presente trabalho foi pesquisar a relação da mastite bovina com os níveis de nutrientes presentes no leite. Foram utilizadas 72 vacas da raça Holandesa, distribuídas em dois grupos: G1=36 vacas clinicamente sadias e G2=36 vacas com mastite subclínica, diagnosticadas pelo California Mastitis Test – CMT, pela contagem de células somáticas e pelo exame microbiológico. No leite, foram determinados os níveis de gordura, proteína, cobre, ferro, manganês e zinco. Os dados obtidos foram submetidos a procedimentos estatísticos, e os parâmetros do leite apresentaram as seguintes médias e desvios-padrões, respectivamente: gordura () 1,251 ± 0,676 e 1,662 ± 1,166 (p> 0,05); proteína () 3,373 ± 0,428 e 3,411 ± 0,348 (p > 0,05); contagem de células somáticas (após formação logarítmica) 1,694 ± 0,632 e 2,909 ± 0,424 (p < 0,0001); Cobre (ppm) 0,043 ± 0,015 e 0,047 ± 0,019 (p > 0,05); ferro (ppm) 0,159 ± 0,047 e 0,191 ± 0,063 (p < 0,05); manganês (ppm) 0,040 ± 0,010 e 0,036 ± 0,010 (p > 0,05) e zinco (ppm) 3,938 ± 1,221 e 3,658 ± 1,212 (p > 0,05). Conclui-se que houve diferença significativa apenas nos níveis de CCS e ferro entre os dois

Determinação de gordura, proteína, cobre, ferro, manganês, zinco e contagem de células somáticas no leite de vacas com mastite subclínica