Comparison of methods of direct microscopy and DeLaval cell counter in determining the somatic cell count in milk samples
2012
Janković, Vesna V. (Institute of Meat Hygiene and Technology, Belgrade (Serbia)) | Matekalo–Sverak, Vesna F. (Institute of Meat Hygiene and Technology, Belgrade (Serbia)) | Đorđević, Vesna Ž. (Institute of Meat Hygiene and Technology, Belgrade (Serbia)) | Vuković, Dejan S. (PKB Corporation, Belgrade (Serbia)) | Borović, Branka R. (Institute of Meat Hygiene and Technology, Belgrade (Serbia)) | Lakićević, Brankica Z. (Institute of Meat Hygiene and Technology, Belgrade (Serbia)) | Mitrović, Radmila R. (Institute of Meat Hygiene and Technology, Belgrade (Serbia))
A number of somatic cells in milk indicates the presence of an inflammable process in mammary glands and serves as an indicator of milk hygienic suitability and milk quality. Somatic cells are mostly leukocytes which reflect the condition of the body in the view of physiological and pathological changes and a possible incidence of mastitis. Apart from mastitis, a somatic cell count in milk is also affected by the following factors: physiological-pharmacological (the phase of lactation, race, veterinarian drugs) and stressrelated ones (method of feeding, transport, keeping conditions, way of milking, technical validity of milking machines). An elevated somatic cell count has a negative effect on the activity of starter cultures and thermal stability of milk. Determination of the somatic cell count in milk is a key factor in evaluation of milk quality and therefore it is necessary to conduct an adequate milk control for presence of somatic cells. The aim of this work is a statistical evaluation of the results obtained by comparing the reference ISO 13366-1 method for determination of the somatic cell count and the DeLaval equipment.
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