Infectious Endocarditis Caused by Pseudomona aeruginosa on Bicuspid Aortic Valve

Juan Lacalzada-Almeida, Maria Manuela Izquierdo-Gomez, Amelia Duque-Gonzalez, Maria del Mar Alonso-Socas, Rebeca Munoz-Rodriguez

Abstract


We report the case of a 53-year-old man with psoriatic arthritis, suffering from a malignant and recidivant myoepithelioma in his right axilla and arm, and undergoing two surgeries, with the last one being performed a month prior to actual admission. After the last surgery, he was admitted to hospital with fever without a source. After physical examination, laboratory tests, blood cultures and transthoracic and transesophageal echocardiography, he was diagnosed with infectious endocarditis (IE) on a bicuspid aortic valve (BAV) caused by Pseudomona aeruginosa (PA). Antibiogram-guided antibiotic therapy with meropenem and tobramicin was initiated. However, in the presence of repetitive spleen infarctions and a large vegetation, 12 days after admission, a bioprosthesis aortic valve implantation was performed. The postsurgical evolution was favorable and prolonged antibiotic course with meropenem and tobramicin was completed. The pathological anatomy and the native valve cultured confirmed an IE caused by PA. Gram-negative non-HACEK IE cases are infrequent, accounting for 1.8% of the total IE cases. PA is the second most frequent bacillus in this group, causing endocarditis more prevalently when associated with healthcare procedures rather than injectable drug use. No prior case study has identified IE caused by PA related to a BAV in the last years.




J Med Cases. 2022;13(6):297-301
doi: https://doi.org/10.14740/jmc3943

Keywords


Infectious endocarditis; Pseudomona aeruginosa; Bicuspid aortic valve; Axillary myoepithelioma

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