Author affiliations: Nara Medical University, Nara, Japan (Y. Ogawa, K. Kasahara, S.T. Lee, R. Nakano, H. Yano, K. Mikasa); Osaka Gyoumeikan Hospital, Osaka, Japan (T. Ito, H. Hasegawa, S. Hirose, S. Santo, A. Yoshida)
Figure. Gram staining of pus obtained from a patient with rat-bite fever. Circles indicate pyrophosphate calcium crystals. Arrows indicate chain-shaped gram-negative bacilli. Original magnification ×1,000.
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