compounds of Chinese herbal medicine and antimicrobial agents for controlling bacterial diseases of European eels ()bacteriostatic activities of eighteen antimicrobial agents from eels were estimated using the method of disc diffusion. The results showed that all of the bacteria were sensitive to antimicrobial peptides and aminoglycosides. Then t antimicrobial agents and three st the three bacteriaRhus chinensis M. combined with one of the four antimicrobial agentsof florfenicol and could inhibit the growth of the three bacteria. Furthermore, the compound was used in curing eels artificially challenged by the three pathogenic bacteria. The results showed that the cumulative survival rates of eels administrated was 20%–50% higher than those of eels non-administrated.