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  • Title: Isolation, culture, and fermentation characteristics of Selenomonas ruminantium var. bryantivar. n. from the rumen of sheep.
    Author: Prins RA.
    Journal: J Bacteriol; 1971 Mar; 105(3):820-5. PubMed ID: 4323298.
    Abstract:
    Large forms of Selenomonas sp. were isolated from the sheep rumen on a rumen fluid-glucose-agar medium by using a differential centrifugation technique to purify the inoculum. The cells from the six isolated strains were curved, gram-negative, strictly anaerobic crescents, and rapidly motile by flagella attached to the concave side of the cell. One or more of the volatile fatty acids were essential for growth. None of the strains produced indole or reduced nitrate. All strains grew on fructose, glucose, mannose, cellobiose, maltose, sucrose, and salicin. Fermentation end products from glucose were mainly lactate, acetate, propionate, and formate. Small amounts of succinate were formed. The final pH in a glucose medium ranged between 4.3 and 4.5. On the basis of the sugar fermentation characteristics and the capacity to form hydrogen sulfide from cysteine, it is suggested that one of the strains is a large form of Selenomonas ruminantium. The other five strains are designated S. ruminantium var. bryanti, var. n.
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