Effect of yeast polysaccharide on the immune function of juvenile sea cucumber, Apostichopus japonicus Selenka under pH stress
Effects of SL-probiotic preparation on the body weight and the phagocytic functions in white mice were studied. Bioassay of its toxicity showed SL-P was non-toxic. Body weight of the treated mice increased significantly as compared with that of controls 10 days after treatment with SL-probiotic preparation. Phagocytic activity, acid phosphatase activity, lysozyme activity of the peritoneal macrophages of the tested mice were enhanced significantly as compared with those of normal controls. The same results were obtained with respect to serum lysozyme activity. These observations showed that SL-probiotic preparation could activate macrophage function in mice and hence enhancement of non-specific immunity.