Evolution des types cellulaires du lait de brebis (race Churra) en fonction des dénombrements cellulaires totaux pendant la traite mécanique et manuelle

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Abstract
Variation in the total number and percentage of cell types (polymorphonuclear, macrophages, agranulocytes, and others) according to total cell counts was studied in milk from 91 ewes of the Churra breed subjected to hand milking (42) or to machine milking (49). The following results were obtained: a) The relative percentages of each cell type varied considerably as the total cell concentration of the milk increased. Analysis of the regression curves indicated very significant coefficients of correlation (p < 0.01). b) The absolute concentrations of each cell type followed linear adjustments on an upward slope and showed very significant coefficients of correlation (p < 0.01) both in hand and machine milking. c) The number and proportion of the main cell types present in milk were independent of the milking method. Over 500,000 cells/ml, more than 85 per cent cells were leucocytes (polymorphonuclear and agranulocytes).