[Kingella denitrificans endocarditis on an aortic valve prosthesis]

Kingella denitrificans is a Gram-negative bacillus which does not grow readily on the usual media. This organism, normally a commensal of the upper airways, may exceptionally be responsible for endocarditis. We report here the sixth case known in the literature. Cure was obtained with an intravenous combination of vancomycin and rifampicin.