草鱼胆汁酸与细菌生长试验

本文研究了草鱼结合胆汁酸直游离胆汁酸盐的抑菌作用，研究结果表明，草鱼结合胆汁酸直力游离胆汁酸酸盐对三种革兰氏阳性菌，如金黄色葡萄球菌、藤黄八叠球菌和苦草孢杆菌有抑菌作用，能够明显地抑制革兰氏阳性菌的生长。草鱼结合胆汁酸盐像乳糖培养基中的牛胆盐一样，能够抑制革兰阳性菌的生长，而有利于革兰氏阴性菌和如大肠杆菌的生长。草鱼游离胆汁酸盐像ＧＮ增菌液中的去氧胆酸钠一样，能够抑制革兰氏阳性菌的生长，而对革兰氏

STUDY ON BILE ACID FROM GRASS CARP BILE AND ITS BACTERIOSTATIC EFFECT

The bacteriostatic effect of both free and combined bile salts from grass carp bile was studied in this paper. The experimental results show that both salts remarkably exerted their bacteriostasis to three species of such Gram positive bacteria as Staphylococus aureus,Sarcina lutea and Bacillus subtilis. The combined salt was quite similar to cow bile salt cultured in lactose bile medium, which showed bacteriostasis to Gram positive bacteria, but not to Gram negative ones like Bacillus coli. As to the free bile salt, it was similar to deoxycholic acid in GN-enriched medium and showed bacteriostasis to Gram positive bacteria, but no effect on the growth of Shigella dysenteriae.