Abstract
The aim of this work was to compare somatic cell count in milk used for making steamed cheese Parenica in Slovak industrial dairies and small farm dairies and to find out whether somatic cell counts in milk affect the dry matter content of Parenica cheese. The samples of raw milk were taken from 3 industrial dairies (A, B, C) and from 3 farm dairies (E, F, G), produced traditional Slovak cheese Parenica in period from January untill December 2018. The somatic cell count in milk was determined by FossomaticTM 5000 (Foss, Denmark) and dry matter of cheese by oven drying method to constant weight. There were no statistically significant differences (p >0.05) for somatic cell counts in milk processed in industrial and farm dairies. Lower somatic cell counts were determined in milk amples from industrial dairies (mean value 326.55 thousand in 1 mL) in comparison to milk samples from farm dairies (mean value 507.67 thousand in 1 mL). Statistically lower dry matter content (p <0.01) in the samples of Parenica cheese was found out in farm dairy E in comparison to other dairies. The relationship between somatic cell count in milk and dry matter in cheese was confirmed by the relatively low correlation coefficients in dairies, A = 0.22; C = 0.15 and F = -0.12 and higher correlation coefficients in dairies, B = -0.32; D = 0.45 and E = -0.48. Obtaining a more accurate effect of somatic cell count on cheese quality requires the continuation of the research on a larger number of samples and consideration of other factors.
Highlights
IntroductionSomatic cell count in milk is commonly used as an index of udder health in lactating dairy cattle (Constable et al, 2016)
To consistently manufacture high-quality dairy products, processors are demanding higher quality raw milk, which can be defined as (1) compositionally complete; (2) free from offflavors and odors; (3) free from detectable drug residues, added water, or other adulterants; (4) having low total bacteria counts; and (5) having low somatic cell counts (Murphy et al, 2016).Somatic cell count in milk is commonly used as an index of udder health in lactating dairy cattle (Constable et al, 2016).Taking cow milk as an example, most healthy cows in a dairy herd have a somatic cell count less than 5 x cells.mL-1
Somatic cell counts determined in raw cow's milk samples, taken from industrial dairies (A, B, C) and small farm dairies (E, F, G) during the year 2018, are in the Table 1
Summary
Somatic cell count in milk is commonly used as an index of udder health in lactating dairy cattle (Constable et al, 2016). Taking cow milk as an example, most healthy cows in a dairy herd have a somatic cell count less than 5 x cells.mL-1. The legal somatic cell count threshold for milk acceptance in dairy industries varies in different countries, e.g. the values for bovine milk in Germany, Canada, and the USA are 1 x 105 cells.mL-1, 5 x 105 cells.mL-1 and 7.5 x cells.mL-1, respectively. For goat and ovine milk, the cutoff value for somatic cells is 1 x cells.mL-1 in the USA but is not defined yet in the EU (Li et al, 2014)
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