Preparation of spent brewer's yeast beta-glucans with a potential application as an immunostimulant for black tiger shrimp, Penaeus monodon.

Spent brewer's yeast was autolysed and the insoluble yeast cell wall fraction obtained was used as a raw material for the preparation of brewer's yeast beta-glucan (BYG). A simple alkaline extraction was applied and optimized. The BYG with significantly (P