Objective To study the effect of active components from Bdellovibrio bacteriovorus metabolites on immune functions in mice.Methods\To inject the mice with ethyl acetate extraction(EAE),chloroform extraction(CE),petroleum ether extraction(PEE) and residual liquid(RL) of Bdellovibrio bacteriovorus metabolites,respectively.The changes of immune functions in the mice were investigated by detection of Hb value,RBC amount,SOD activity,agglutinating antibody titer,phagocytic activity and bactericidal activity ever...