Listeria monocytogenes endocarditis is rare. The authors report a case
involving a porcine prosthetic valve in an immunosuppressed patient,
Eight blood cultures developed L. monocytogenes. The culture of the re
sected cardiac valve was positive after six weeks of antibiotics (thio
phenicol-gentamicin and vancomycin-gentamicin). Cure was obtained afte
r surgical therapy and medical therapy (five months).