Journal of Food, Agriculture and Environment

Survey of somatic cell count, total bacterial count and milk protein in raw milk in Tangshan city, China

Author(s):

Liansheng Zhao ^{1, 2†}, Baiqin Zheng ^3†, Nan Zheng ^{2, 4, 5†}, Songli Li ^{2, 4, 5}, Han Hu ^{2, 4, 5}, Yangdong Zhang ^{2, 4, 5}, Jiaqi Wang ^{2, 4, 5*}

Recieved Date: 2014-02-26, Accepted Date: 2014-04-17

Abstract:

The objective of this study was to investigate raw milk quality by measuring somatic cell count (SCC), total bacterial count (TBC), and milk protein. In addition, we compared raw milk quality between the milk stations of dairy farms and dairy cooperatives, respectively, in Tangshan city, which is the second-largest dairy-producing city in China. A total of 128 raw milk samples, comprising 70 samples from dairy farm milk stations and 58 samples from dairy cooperative milk stations, were collected in July 2011. The SCC ranged between 27.1×10⁴ and 110.3×10⁴ cells/ml, with 73.4% of the 128 samples being in accordance with the standards of United States Grade A Pasteurized Milk Ordinance of 75×10⁴ cells/ml (2011). The TBC ranged between 0.55×10⁴ and 40×10⁴ CFU/ml, and was in compliance with the Chinese national standard (GB19301-2010) of 200×10⁴ CFU/ml. A total of 73.5% of samples reached 10×10⁴ CFU/ml, which is the standard of both the European Union and the United States. The protein content in the 128 samples was in the range of 2.82 -3.23 g/100 g, reaching the Chinese national standard (GB19301-2010) of 2.80 g/100 g. The SCC, TBC, and protein content values obtained showed that the quality of raw milk in Tangshan city was much higher than that stipulated in the Chinese legal limit. Further, the quality of the raw milk from the dairy farm milk stations was similar to that of the dairy cooperative milk stations, as indicated by the similar SCC, TBC and protein content values obtained (p>0.05).

Keywords:

Raw milk, TBC, SCC, protein, Tangshan city, China

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Journal: Journal of Food, Agriculture and Environment
Year: 2014
Volume: 12
Issue: 2
Category: Food and Health
Pages: 224-228

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