Abstract
A novel purification method of egg yolk immunoglobulin (IgY) based on precipitation using agarPEG was developed. This me thod was compared with chloroform extraction and polyethylene glycol (PEG) precipitation methods. The results showed the protein contents were high with chloroform method followed by agarPEG then PEG method. The purity of resultant I gY was homogeneous with agar� PEG method followed by PEG method then chloroform extraction method. The IgY purified by agar -PEG method, obtained from hens immunized by formalintreated S. aureus , showed a significant reduction in bacterial growth and the growth inhibition was dependent on specificIgY concentration.
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