Figure 4.

Bivariate association (ANOVA or Student’s t-test) between the concentration of yeasts in the milk (log₁₀ CFU/mL) and the considered factors. Legend: YA1 = presence of yeasts in the air from the milking parlour, YA2 = presence of yeasts in the air from the livestock housing, YT = presence of yeast on the surface of teat, YF = presence of yeast in the feed, Season = season of the year, HygMP = hygiene of the milking parlour, HygLH = hygiene of the livestock housing, OriMP = orientation of the milking parlour, OriLH = orientation of the livestock housing, VentLH = ventilation of the livestock housing, Milkline = milkline of the milking machine, CleanMP = frequency of cleaning of the milking parlour, Filter = frequency of changing of milk filters, Cluster = possibility of contact between the clusters and the ground, Acid = frequency of use of acid for cleaning the milking machine, Silage = use of silage, Grain = use of grain during milking.