Medycyna Wet. 64 (11), 1299-1303, 2008
| Malinowski E., Smulski S., Gehrke M., KŁossowska A., Arczyńska A., Kaczmarowski M. |
| Effect of storage conditions and preservation with Bronopol on the somatic cell count with the DeLaval cell counter in cow milk |
| The aim of the examination was to evaluate the effect of the preservative and storage conditions of samples on the somatic cell count (SCC) with the DeLaval cell counter (DCC) and Fossomatic 90 (FS) in different kinds of cow milk. SCC was measured in 25 premilk samples from the healthy quarters (HQ) of 25 clinically healthy cows, in 25 premilk samples from the quarters with subclinical mastitis (SMQ) of other 25 clinically healthy cows, in 25 composite cow milk (CCM) samples of other 25 clinically healthy cows, and in 25 samples of bulk tank milk (BTM) from 25 farms. The somatic cell count determined with DCC immediately after sampling ranged from 1,000 to 156,000/ml in samples from HQ, from 142,000 to 1 672,000/ml in samples from SMQ, from 5,000 to l 442,000/ml in CCM and from 46,000 to 603 000/ml in BTM. It was established that DCC indicates almost an identical number of cells in milk immediately after sampling, and in the same samples cooled and stored for 1h, 24h, 72h or frozen and stored for 7 days, irrespective of preservation with Bronopol. Somatic cell counts in unpreserved and preserved milk samples determined with DCC were very close to cell counts established with Fossomatic 90. The correlation between data obtained with DCC and Fossomatic 90 was statistically significant (p < 0.01). |
| Keywords: cow milk, somatic cell count, preservative, storage, DeLaval cell counter |