A 46-year-old man with history of intravenous drug use is admitted to hospital for worsening fever and confusion. Vitals are: temperature 102.8 F, HR 100, RR 20, BP 138/87. Cardiac examination shows a 2/6 holosystolic murmur at the lower left sternal border that increases with inspiration. Which of the following is the most likely explanation for these findings?
Gram-negative diplococci
Gram-negative rods
Gram-positive cocci in chains
Gram-positive cocci in clusters
Gram-positive diplococci
