The name Soltys and Spratling 1957 was not included on the 1980 Approved Lists of Bacterial Names and has no current nomenclatural standing. This commonly occurring swine pathogen was studied to determine its taxonomic status. It is an anaerobic, gram-positive, catalase-negative, nonmotile, nonsporulating, short to medium-sized, rod-shaped organism that grows optimally at pH 7.0 to 8.0 and 37°C. Of 27 substrates tested, this bacterium fermented only maltose, glycogen, and starch. This organism is urease positive but is negative in other common biochemical tests. Growth in peptone-yeast extract-maltose medium is not enhanced by Tween 80, heme, or menadione and is inhibited by bile. Rhamnose and lysine are the major cell wall components, whereas mannose, glutamic acid, and alanine are the minor components in the cell wall of this organism. Acetate, ethanol, and formate are the major metabolic products of maltose fermentation. No detectable levels of propionate are produced. Major amounts of type cytochrome and minor amounts of type cytochrome appear to be present in cell extracts. It is susceptible to penicillin G, ampicillin, erythromycin, tetracycline, cephalothin, and clindamycin. The deoxyribonucleic acid of this organism has a guanine-plus-cytosine content of 55 mol%. These data indicate that this organism does not belong in the genus but rather in . Therefore, the name (nom. rev.) comb. nov. is proposed for it, and strain Soltys 50052 (= ATCC 33144) is designated the type strain.


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