title: [The occurrence and properties of Selenomonas ruminantium bacteria in calves during the time of milk feedings].
abstract: The occurrence, morphological properties, urease and alpha-amylase activities of Selenomonas ruminantium were investigated in calves in the period of milk nutrition. The average number of the organisms was found to range between 10(7) and 10(8) per 1 millilitre of rumen contents. The alpha-amylase activity of the Selenomonas strains ranged from 0.1 to 8.8 ncat.ml-1 whereas their urease activity ranged from 6.3 to 261 ncat.ml-1 of nutrient medium. The presence of morphologically typical Selenomonas ruminantium and spontaneous formation of spheroplasts were found by electron microscopic examination.
mesh_terms: D000367:Age Factors; D000821:Animal Feed; D000818:Animals; D002417:Cattle / Q000382:microbiology*; D008892:Milk; D011548:Pseudomonadaceae / Q000201:enzymology / Q000302:isolation & purification* / Q000648:ultrastructure; D012417:Rumen / Q000382:microbiology*; D014510:Urease / Q000378:metabolism; D000516:alpha-Amylases / Q000378:metabolism
chemical_list: D000516:alpha-Amylases; D014510:Urease
vernacular_title: Výskyt a vlastnosti baktérií Selenomonas ruminantium u teliat v období mliecnej výzivy.