Streptobacillus moniliformis

Pleomorphic filamentous bacilli with characteristic bulbous swelling arranged in chains and tangled clumps on Gram stain (x 1000).

Reproduced with permission from Torres, A, Cuende, E, De Pablos, M, et al. Remitting seronegative symmetrical synovitis with pitting edema associated with subcutaneous streptobacillus moniliformis abscess. J Rheumatol 2001; 28:1696. Copyright © 2001 Journal of Rheumatology.

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