Abstract: The effects of three traditional Chinese medicine compounds（AB,CD,and AH） on lysozyme activities in serum,hepatopancreas and Spleen were studied in 1＋ age health crucian carp（Carassius auratus） weighing（44.6±0.2） g were studied at water temperature of 18 ℃.The fish were fed the diets containing AB,CD,AH or basic diet without any Chinese medicine compounds at a feeding rate of 2.0% for 28 days.Blood and tissue samples were collected 1 day after fasting to be assayed for the lysozyme activity.The results showed that the three Chinese medicine compounds improved the lysozyme activity in the crucian carp.There was significant increase in serum lysozyme activity in the fish fed the diet containing AB than that in the control group.The fish fed the diets containing AB,and CD had significant enhancement of hepatopancreas lysozyme activity.However,significant higher lysozyme activity was found in the spleen of the fish fed the diet containing the three traditional Chinese medicine compounds.It is concluded that the traditional Chinese medicine compounds can enhance crucian carp immunity,and have a value for further research and application.Still,the medicine mechanism and functions are needed for further research due to organ and tissue specialization for the three compounds.

Key words: lysozyme, traditional Chinese medicine, crucian carp