Effects of silage feeding on the microbiological quality of milk
1989
Vujicic, I.F. | Vulic, M. (Poljoprivredni fakultet, Novi Sad (Yugoslavia). Institut za stocarstvo)
The microbiological quality of milk with regards to butyric bacteria contamination was examined due to the silage feeding. Bulk milk samples were selected from herds fed and not-fed silage at the reception platform of local dairy plant in Novi Sad (Yugoslavia) over all seasons during two years. The means presented in the paper are calculated from 38 samples analyzed. Silage milk was generally characterized by considerably higher standard plate counts as with higher counts of psychrotrophs, thermoduric and aerobic mesophilic bacteria of Bacillus subtilis type compared to non-silage milk. The counts of butyric bacteria were varying from 1.300 and 70.000 and from 200 to 700 spores per l in silage and non-silage milk, respectively. Also, butyric bacteria spores were not found in 60% of non-silage milk samples. The results indicate that the only a limited quantity of silage milk but all non-silage milk quantity could be considered suitable for use in the manufacture of Swiss-type cheeses.
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