Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
2439450 | Journal of Dairy Science | 2009 | 10 Pages |
Abstract
The objectives of this study were to evaluate microbiological quality of bulk tank milk in Prince Edward Island, to evaluate correlation among milk quality criteria, and to determine seasonal effects on milk quality parameters. Bulk tank raw milk quality was evaluated on all Prince Edward Island dairy herds (n = 235) over a 2-yr period (March 2005 to March 2007). Biweekly total aerobic (TAC), preliminary incubation (PIC), laboratory pasteurization, and coliform (CC) counts were determined using a Petrifilm culture system. Additionally, bulk tank somatic cell count was determined weekly. The mean and median values were 12.8Â ÃÂ 103 and 4.9Â ÃÂ 103Â cfu/mL for TAC, 29.6Â ÃÂ 103 and 13Â ÃÂ 103Â cfu/mL for PIC, 87 and 12Â cfu/mL for laboratory pasteurization count, 21 and 5Â cfu/mL for CC, and 218Â ÃÂ 103 and 187Â ÃÂ 103Â cells/mL for somatic cell count. There was moderate correlation (0.57) between TAC and PIC. All other correlation coefficients were low (<0.26). Correlation results suggest that a single quality parameter could not predict others used in this study. Seasonal data indicate that 1) in general, all counts tended to be low in winter, 2) the CC and somatic cell count were always high in summer, and 3) TAC tended to be high during summer.
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Authors
A.M. Elmoslemany, G.P. Keefe, I.R. Dohoo, R.T. Dingwell,