Unusual infective prosthetic valve endocarditis due to Pseudomonas monteilii and Acinetobacter nosocomialis with a fatal result

Abstract We report a case of Pseudomonas monteilii and Acinetobacter nosocomialis endocarditis with a fatal outcome in a patient with a recent history of prosthetic aortic valve replacement. Transesophageal echocardiography and computed tomography confirmed the presence of vegetation on the prosthetic valve and aortic pseudoaneurism with an aortic root abscess. Valve cultures yielded P. monteilii and A. nosocomialis. The patient underwent surgery and received antibiotics, but his condition deteriorated and he died 44 days after surgery. To our knowledge, this is the first case of P. monteilii and A. nosocomialis endocarditis reported in the literature. These organisms have been described as environmental contaminants; however, they must be considered potential pathogens, particularly in patients with prosthetic valves.