Eubacterium yurii subsp. schtitka subsp. nov.: Test Tube Brush Bacteria from Subgingival Dental Plaque

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Abstract
Representative strains of the test tube brush bacterium Eubacterium yurii, previously recovered from subgingival dental plaque of chronic adult periodontitis patients, were examined by determining their serological reactivities, protein electrophoretic patterns, deoxyribonucleic acid homologies, and bone resorptive activities in vitro. Our results indicate the existence of a third subspecies, E. yurii subsp. schtitka subsp. nov., in addition to the two previously described subspecies, E. yurii subsp. yurii and E. yurii subsp. margaretiae. The third subspecies is phosphatase negative and asaccharolytic and does not stimulate bone resorption in vitro. The type strain of E. yurii subsp. schtitka is strain ATCC 43716.

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