20th June 2024

A 54-year-old lady presents to the Emergency department with a fever for 1 week

A 54-year-old lady presents to the Emergency department with a fever for 1 week. She also complains of malaise, anorexia, and rigors. She has a history of prosthetic valve replacement for a bicuspid aortic valve one month ago. She is pyrexial at 39 degrees Celsius, her blood pressure is 90/54 mmHg and her heart rate is 110/min. A Provisional diagnosis of infective endocarditis is made.

What is the most likely causative organism?

Select the SINGLE most appropriate option from the list below. Select ONE option only.