Actinobacillus endocarditis associated with periodontal disease

Actinobacillus actinomycetemcomitans, an organism associated with rapidly destructive periodontal disease (periodontitis), is a rare cause of endocarditis in children. This report presents a case of A. actinomycetemcomitans endocarditis in a 6-year-old child with rapidly destructive periodontal disease. A leukotoxic antigen was documented in the strain of A. actinomycetemcomitans isolated from the patient's blood.