A Case of Vascular Graft Infection Caused by Haemophilus parainfluenzae .

Haemophilus parainfluenzae is a gram-negative coccobacillus that is a part of the normal flora in the human upper airway and sometimes causes infective endocarditis. We present a case of a 68-year-old Japanese man who had vascular graft infection caused by H. parainfluenzae 4 years after surgery for chronic aortic dissection.