Cellulosimicrobium funkei: First Report of Infection in a Nonimmunocompromised Patient and Useful Phenotypic Tests for Differentiation from Cellulosimicrobium cellulans and Cellulosimicrobium terreum

Cellulosimicrobium funkei is a rare, opportunistic pathogen. We describe a case of bacteremia and possibly prosthetic valve endocarditis by this organism in a nonimmunocompromised patient. Useful phenotypic tests for differentiating C. funkei from Cellulosimicrobium cellulans and Cellulosimicrobium terreum include motility, raffinose fermentation, glycogen, d-xylose, and methyl-α-d-glucopyranoside assimilation, and growth at 35°C.