Brief report| Volume 10, ISSUE 3, P168-170, December 1999

Native valve endocarditis due to Actinobacillus actinomycetemcomitans


      Actinobacillus actinomycetemcomitans is a fastidious organism that requires carbon dioxide for primary isolation and grows slowly in culture. Infections by this organism affect middle-aged and older men with abnormal or replaced aortic or mitral valves who have been subjected to dental manipulation or individuals with poor oral hygiene. The diagnosis is delayed since growth of the organism is slow. A. actinomycetemcomitans remains an unusual cause of endocarditis. Since 1962, 71 cases of A. actinomycetemcomitans have been reported in the English language literature, while only one case with a history of mitral prolapse has been reported. We describe a case of native valve endocarditis on an apparently normal valve with mild mitral prolapse. To our knowledge, this is the first reported case of endocarditis due to A. actinomycetemcomitans from Greece.


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