Process for manufacturing a protein concentrate containing immunological factors of lactic origin

The invention relates to a method for producing a protein concentrate containing immunological factors of lactic origin, including active non-denatured immunoglobulins, characterized by the steps of: - recovering the milk of hyperimmunized milk females; - separating the cream and the impurities; - coagulating the clarified and skimmed milk; - separating the casein, filter, ultrafilter and sterilized protein whey by filtration, evaporated and the product dried under conditions that do not denaturing the immunoglobulins and maintaining sterility .