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本文定量检测４０只小鼠新鲜大便中的优势菌群。依次为类杆菌、乳杆菌、大肠杆菌和肠球菌。作者用抗生素抑制小鼠肠道正常菌群，再以鼠伤寒沙门氏菌感染这些小鼠，加重了肠道菌群失调，小鼠失去定植抗力。然后将鼠粪制剂，丽珠肠乐（人双歧杆菌）进行分组调整，并以抗生素＋鼠伤寒沙门氏菌不治疗作阴性对照组；肉汤＋鼠伤寒沙门氏菌不治疗作对照组，连续观察一周。结果验证了：１、抗生素可造成菌群失调；２、正常肠道菌群对急性肠道病原菌有拮抗作用；３、停喂抗生素及沙门氏菌未加治疗的部分存活小鼠菌群变动后又可自行恢复：４、小鼠粪便制剂比人双歧杆菌制剂能更有效的调整肠道菌群恢复到正常水平。
In this paper, quantitative detection of 40 mice fresh stool in the dominant flora. Followed by Bacteroides, Lactobacillus, Escherichia coli and Enterococcus. The authors used antibiotics to inhibit the normal intestinal flora of mice, then infected with these mice Salmonella typhimurium, aggravating intestinal flora, loss of colonization resistance in mice. Then the rat droppings, Lactucae (Bifidobacterium human Bifidobacterium) were grouped and adjusted with antibiotics + Salmonella typhimurium without treatment as negative control; broth + Salmonella typhimurium without treatment as the control group, continuous observation for one week. The results showed that: 1, antibiotics can cause flora; 2, normal intestinal flora antagonistic to the acute intestinal pathogens; 3, stop feeding antibiotics and Salmonella survived part of the mice survived changes in the group Self-recovery: 4, mice stool preparation than human Bifidobacterium preparations can more effectively adjust the intestinal flora restored to normal levels.