The three type strains and a reference strain of examined in this study had a gram-positive type of cell walls. All four strains were susceptible to vancomycin and resistant to colistin, and the overall susceptibility patterns with other antimicrobial agents were consistent with those of gram-positive microorganisms. Strains of were lysed by 3% potassium hydroxide, and strains of were not. However, all of the strains examined had intermediate levels of amebocyte-lysate reactivity that was not lipopolysaccharide associated. Lipopolysaccharide was not detected when whole-cell lysates were digested with proteinase K, separated by sodium dodecyl sulfate-polyacrylamide gel electrophoresis, and silver stained. In addition, 2-keto-3-deoxyoctulosonic acid and heptose were not detected by gas chromatography of -methyloxime acetate derivatives of whole-cell carbohydrates. Saponification and gas chromatography of whole-cell fatty acids showed that none of the four strains examined had detectable levels of hydroxylated fatty acids. Hydroxylated fatty acids or aldehyde fatty acids were not detected in acid hydrolysates of crude cell membrane preparations.


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