Several strains were isolated from sea mud in the sea area ofQingdao,Shandong and screened four strains A-21,4-2,5-23 and 7-11producing biology activity substances.More studies have been done and according to bergey’s Manunal of Determinative Bacteriology,8thed,they are identified to be Erwinia sp.,Aeromonas sp.,Micrococuus sp.and Pseudomonas sp..

随着渔业养殖的规模化和集约化的发展,各种鱼病的爆发成了影响渔业养殖的制约因素之一,对鱼病防治与控制问题也相应突出出来.研究安全、有效抗防病药物和添加剂十分重要.