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[Propionibacterium acnes infectious endocarditis]

S Durupt¹, A Boibieux, M Ballet-Mechain

¹Service des Maladies infectieuses, Hôpital de la Croix Rousse, Lyon.

Presse Medicale (Paris, France : 1983)

|December 18, 1998

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Propionibacterium acnes (P. acnes) can cause infective endocarditis, particularly in prosthetic valves. Slow bacterial growth necessitates careful interpretation of positive blood cultures to avoid misidentification as contamination.

Area of Science:

Microbiology
Infectious Diseases
Cardiology

Background:

Propionibacterium acnes (P. acnes), a Gram-positive bacterium, is generally considered to have low virulence.
Despite its low virulence, P. acnes has been implicated in rare cases of infective endocarditis.

Observation:

Two cases of prosthetic valve infective endocarditis caused by P. acnes are presented.
One patient developed acute prosthetic valve endocarditis and died, while the second experienced infectious spondylitis.

Findings:

P. acnes is an infrequent cause of infective endocarditis, with a tendency to affect prosthetic valves.
Skin infection history is uncommon in P. acnes endocarditis cases.
P. acnes exhibits slow growth, requiring 7-14 days for identification, complicating diagnosis.

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Implications:

Positive blood or valve cultures for P. acnes should be interpreted cautiously, considering its slow growth and potential for contamination.
The findings highlight the importance of considering P. acnes in the differential diagnosis of endocarditis, especially in patients with prosthetic valves.