关键词: 鲫鱼, 大鼠, 肠道微生物, 分离, 鉴定

Abstract: Objective The distribution of intestinal microflora in different parts of animals，intestine which living environment are quite different. Method With taking the contents of different intestinal segments of mice and crucian carp, extracting and culturing with different selective medium, and then carring out the plate count. Result It was found that the proportion of Lactobacillus in the intestine of rats was higher than that of crucian carp, and the proportion of other colonies (Bifidobacterium, Enterococcus, Escherichia coli) was significantly smaller than that of crucian carp. The distribution of intestinal anaerobic Bifidobacterium in rats and crucian carp increase in the downward direction along the gut.The magnitude of aerobic Enterococcus in the intestine of rats and crucian carp was almost same. Conclusion The inestinal microbiological information of different animals can preovide some experimental basis for the study of pathology and toxicology.

Key words: crucian carp, rat, intestinal microbiology, isolation, identification