A 30-years-old type 1 diabetic male presents with fever, dyspnea, weight loss, fatigue, red tender and raised lesions on hands and feet, and nails clubbing. The patient has history of untreated condition which accompanied with a systolic murmur that becomes softer with squatting. Echocardiography shows abscess and vegetations around and within the mitral valve, and ballooning of the valve. No history of any valve replacement. The patient has history of LSD hallucinogens tablets abuse. Family history shows that the patient’s father died due to colorectal cancer. Microbiological tests show positive culture of pyrrolidonyl aminopeptidase (PYR) negative, mannitol negative, bile-eusculin negative , urease negative and oxidase negative bacteria that do not require hemin/hematin to grow. The most likely bacterial agent that infects the patient is:
A) Staphylococcus aureus
Β) Staphylococcus epidermis (coagulase-negative staphylococcus)
C) Viridans Streptococcus
D) Streptococcus bovis
E) Haemophilus parainfluenzae
F) Aggregatibacter actinomycetemcomitans
G) Cardiobacterium hominis
H) Kingella kingae
Ans: D) Streptococcus bovis