Abstract: Obtaining quail egg extracts.The ovomucoid fraction is obtained by the process consisting in:(1) adding trichloroacetic acid in solution in acetone to quail egg white;(2) separating the supernatent from the reaction medium;(3) adding acetone to the supernatent so obtained;(4) dissolving the precipitate obtained in step (3) in water and in dialyzing the solution obtained against water;(5) filtering the resulting solution through a membrane having a cut-off of about 10,000(6) then subjecting the filtered solution to molecular filtration and in recovering all the fractions having antitrypsin activity.Application in the treatment of allergic states.