Trovatelli L D, Matteuzzi D
Appl Environ Microbiol. 1976 Oct;32(4):470-3. doi: 10.1128/aem.32.4.470-473.1976.
A study was made on the numbers and species of bifidobacteria present in the rumen of calves fed high-roughage and high-concentrate diets. With the roughage ration the bifidobacteria were not detectable in a 10(-3) dilution, whereas with the concentrate ration their number was high, usually in the order of 10(8) to 10(9)/ml of rumen fluid. The species most represented, identified by means of deoxyribonucleic acid-deoxyribonucleic acid hybridization tests, included Bifidobacterium ruminale, Bifidobacterium globosum, and an apparently new species.
对饲喂高粗饲料和高浓缩饲料的犊牛瘤胃中双歧杆菌的数量和种类进行了研究。在粗饲料日粮中，在10⁻³稀释度下未检测到双歧杆菌，而在浓缩饲料日粮中，其数量很高，通常为每毫升瘤胃液10⁸至10⁹个。通过脱氧核糖核酸-脱氧核糖核酸杂交试验鉴定出的最具代表性的菌种包括瘤胃双歧杆菌、球形双歧杆菌和一个明显的新菌种。
