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Colony and microscopic morphology of the new isolate. Gram staining of the positive anaerobic blood culture bottle showed Gram-positive, rod-shaped bacteria without obvious spore formation (A). Dull white, flat colonies with mixed sizes and smooth edges (B) and Gram-positive, ovoid-shaped spores located subterminally (C) were observed 2 days after subculture on an anaerobic blood plate.
