Table 3.
Variable | Levels | Frequency (%) |
---|---|---|
YA1 | Yes | 44 (91.7) |
No | 4 (8.3) | |
YA2 | Yes | 44 (91.7) |
No | 4 (8.3) | |
YF | Yes | 31 (64.6) |
No | 17 (35.4) | |
YT | Yes | 3 (6.3) |
No | 45 (93.7) | |
Season | Spring | 12 (25.0) |
Summer | 12 (25.0) | |
Autumn | 12 (25.0) | |
Winter | 12 (25.0) | |
HygMP | Adequate | 35 (72.9) |
Not | 13 (27.1) | |
HygLH | Adequate | 35 (72.9) |
Not | 13 (27.1) | |
OriMP | N-S | 24 (50.0) |
E-W | 8 (16.7) | |
NE-SW | 8 (16.7) | |
NW-SE | 8 (16.7) | |
OriLH | N-S | 12 (25.0) |
E-W | 16 (33.3) | |
NE-SW | 8 (16.7) | |
NW-SE | 8 (16.7) | |
Other | 4 (8.3) | |
VentLH | Adequate | 24 (50.0) |
Not | 24 (50.0) | |
Milkline | High Low |
32 (66.7) 16 (33.3) |
CleanMP | After each milking | 25 (50.0) |
Daily | 12 (25.0) | |
Less frequently | 12 (25.0) | |
Filter | After each milking | 20 (41.7) |
Daily | 24 (50.0) | |
Every two days | 4 (8.3) | |
Cluster | Yes | 24 (50.0) |
No | 24 (50.0) | |
Acid | Daily | 8 (16.7) |
Each 2–3 days | 36 (75.0) | |
Less frequently | 4 (8.3) | |
Silage | Yes | 16 (33.3) |
No | 32 (66.7) | |
Grain | Yes | 24 (50.0) |
No | 24 (50.0) |
Legend: YA1 = presence of yeasts in the air from the milking parlour, YA2 = presence of yeasts in the air from the livestock housing, YF = presence of yeast in the feed, YT = presence of yeast on the surface of teat, 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.