Evaluation of antibodies concentration in cow's milk from different agricultural systems
2007
Zagorska, J. | Ciprovica, I. | Mikelsone, V.
The aim of the present study was to determine and compare IgA, IgG, IgM, lactoferrin, and lysozyme concentrations in organic, transitional period (from conventional to organic agriculture), and conventional milk samples. In total, 20 conventional, 20 transitional period and 20 organic milk samples, obtained from healthy cows, were analyzed. The individual cow's milk samples were taken from farms located in different regions of Latvia: Cesis, Ogre, and Bauska. Concentrations of IgA, IgG, IgM, and lysozyme were determined by turbidimetric method. The concentration of lactoferrin was determined by immunofermentative method. Differences in the concentrations of immunoglobulins, lactoferrin, and lysozyme were determined by descriptive statistics using Microsoft Windows for SPSS software packages. The concentration of IgA in organic milk samples proved to be significantly lower than in conventional milk samples. Significant differences were not established in the concentrations of IgG and lysozyme in the milk obtained from different agricultural systems. The concentrations of IgM and lactoferrin in organic milk were significantly higher than in conventional milk. In all kinds of milk the concentrations of IgA and IgM were higher compared to the data in the literature. Organic agriculture has significant influence on cow's immunity fortification, which was demonstrated by different concentrations of lactoferrin and immunoglobulins in organic and conventional milk.
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