Microbiology Which organism causes prosthetic valve endocarditis within 60 days of surgery? A Streptococcus viridans B Fungus C Staphylococcus aureus D Staphylococcus epidermidis 💡 Explanation Which organism causes prosthetic valve endocarditis within 60 days of surgery? ✓ Correct Answer: D. Staphylococcus epidermidis