First Reported Case of Actinomyces oris Endocarditis and Bacteremia in the United States: A Case Report

Our case highlights the diagnostic challenges posed by slow-growing organisms like <i>A. oris</i> in patients with comorbidities, especially on hemodialysis. Blood cultures and transesophageal echocardiography were critical in diagnosing this case. Advanced microbial diagnostic techniques are crucial in identifying the pathogen and the pathogen's susceptibility-guided treatment. This case highlights the importance of early recognition and tailored therapy for rare pathogens like <i>A. oris</i>.