いわゆるSubclinical Mastitisの乳成分について

概要

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Studies were carried out on the chemical composition of Subclinical mastitis milk affected with microorganisms of Strepto-type, Staphylo-type and Micro-type in Holstein, Brown Swiss and Guernsey cows in Hokkaido.<BR>The most marked effects, from a chemical point of view, consisted in the decrease of lactose, the increase of NaCl, electric conductivity, non-Casein N and the catalase mumber. Alcohol and B. T. B. tests proved to be unreliable in the detection of mastitis of this kind and, therefore, not practical.Generally, fluctuations of milk composition and cell numbers were the most characteristic in udders affected with the Strepto-type of the three types. Numbers of Strepto-type organisms became almost negligible within a week after the administration of penicillin, but no udders were found immune.<BR>The four quaters of the udder were not conne cted with one another and secreted milk the composition and bacterial type of which were not the same.
社団法人日本畜産学会の論文