Microbiology A 28 year old man with 3 weeks of fever presented with tricuspid valve vegetation. What is the MOST common cause of Endocarditis in I.V. drug abusers? A Staph.aureus B Candida albicans C Pseudomonas D Streptococcus viridans 💡 Explanation A 28 year old man with 3 weeks of fever presented with tricuspid valve vegetation. What is the MOST common cause of Endocarditis in I.V. drug abusers? ✓ Correct Answer: A. Staph.aureus