Bergaoui R, Vervaeke I
Zentralbl Bakteriol A. 1980 Jun;247(1):74-83.
Counting of bacteria, detection of urease-positive bacteria and estimation of bacterial ureolysis influenced by Bacitracin and Flavomycin was done on intestinal contents from different segments of the digestive tract of laying hens. It was concluded that: - the intestinal flora was numerically most important in the caecum and was composed principally of lactobacilli in the crop, gizzard, duodenum, jejunum and ileum, and of lactobacilli and anaerobes in the caecum and colon. - 17% of the total number of intestinal bacteria were urease-positive. - the ureolytic activity was most important in the caecum: 24 mg of urea hydrolysed/g of contents during 4 hours of incubation. The range is between 2 and 4 mg in the other segments. - until the level of 500 ppm, Bacitracin and Flavomycin did not influence the in vitro ureolytic activity of fecal and cecal material.
对蛋鸡消化道不同部位的肠内容物进行了细菌计数、尿素酶阳性细菌检测以及杆菌肽和黄霉素对细菌尿素分解影响的评估。得出以下结论：- 肠道菌群数量在盲肠中最为可观，嗉囊、肌胃、十二指肠、空肠和回肠中的肠道菌群主要由乳酸杆菌组成，而盲肠和结肠中的肠道菌群则由乳酸杆菌和厌氧菌组成。- 肠道细菌总数的17%为尿素酶阳性。- 尿素分解活性在盲肠中最为显著：在4小时的孵育过程中，每克内容物可水解24毫克尿素。其他部位的范围在2至4毫克之间。- 杆菌肽和黄霉素在500 ppm的浓度水平以下，不会影响粪便和盲肠物质的体外尿素分解活性。
