Medicine Most common cause and the most common valve affected in Infective endocarditis in I.V drug abusers A Streptococcus viridans—tricuspid valve B Pseudomonas—mitral valve C Staphylococcus aureus—tricuspid valve D Streptococcus bovis—mitral valve 💡 Explanation Most common cause and the most common valve affected in Infective endocarditis in I.V drug abusers ✓ Correct Answer: C. Staphylococcus aureus—tricuspid valve