Kingella kingae Endocarditis in a Child with Hair–Cartilage Hypoplasia

Abstract. Kingella kingae is a fastidious Gram-negative rod that since the 1980s has been appreciated as a cause of a variety of human infections, including bone and joint infections, bacteremia, and rarely endocarditis [2, 6, 7, 9]. K. kingae endocarditis is rare, and only a few cases occur in normal, native valves. We report a case of K. kingae endocarditis in a patient with hair–cartilage hypoplasia who had previously undergone bone marrow transplantation. The combination of these rare conditions is discussed.