A patient has prosthetic valve replacement and he develops endocarditis 8 months later. Organism responsible is -: (A) Staph. aureus, (B) Strept. viridans, (C) Staph. epidermidis, (D) HACEK
Answer is C. Most common cause of prosthetic valve endocarditis upto 12 months is coagulase-negative staphylococci (staph. epidermidis).