Molecular Relationships and Classification of Some Viridans Streptococci as Streptococcus oralis and Emended Description of Streptococcus oralis (Bridge and Sneath 1982)

Abstract

Nucleic acid hybridization studies together with a chemical cell wall analysis and physiological data indicated that some strains designated as Streptococcus sanguis 11, Streptococcus sp. ("S. mitior"-S. sanguis), and " S . viridans" I, 11, and IV are closely related to the type strain of S. oralis. These strains contained a directly cross-linked peptidoglycan with lysine as a diamino acid and ribitol and choline as characteristic cell wall constituents. We propose that these strains be classified as members of S. oralis. An emended description of S. oralis is given. S . oralis strains are genetically related to S. pneumoniae strains, and representatives of both species contain ribitol and choline in their cell walls.

Streptococcus pluranimalium sp. nov., from cattle and other animals

“…In addition, it was noted that this strain did not react in tests for acid production from salicin and cellobiose. This is in contradiction to results described in the literature (Kilpper-Balz et al, 1985).…”

Streptococcus suis sp. nov., nom. rev.

“…This peptidoglycan type was found among streptococci only in strains of " S . suis" and S. oralis (8). However, in contrast to S .…”

Characterization of Streptococcus sanguis Isolated from Patients with Behçet's Disease

“…Ribitol teichoic acid, one of the important characteristics of ATCC10557 (14), was not detected in MCLS-1, MCLS-2, and BD113-20. Rhamnose was not detected in MCLS-2 or BD113-20, though this is not an important character because one of the representative strains of S. oralis, kiel 61162, has rhamnose-negative cell walls (10). In BD113-20, galactosamine was also not detected.…”