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In two patients with prosthetic valve endocarditis due to Peptostreptococcus magnus, blood cultures in the BacT/Alert and BACTEC 9240 systems were signal negative. The capability of the BacT/Alert system to detect various Peptostreptococcus species was assessed. P. magnus and P. anaerobius could not be detected, and subcultures remained negative. The growth in conventional media of these two species and other Peptostreptococcus species was similar.


Journal article


Journal of clinical microbiology

Publication Date





4640 - 4642


Department of Medical Microbiology, Academic Medical Center, University of Amsterdam, Amsterdam, The Netherlands.


Humans, Peptostreptococcus, Bacteremia, Endocarditis, Bacterial, Heart Valve Prosthesis Implantation, Adult, Aged, Male