<prompt> A 23 year old patient had fever since 2 weeks presents with mitral valve vegetation. Patient is a intravenous drug abuser. Most common cause of endocarditis in this patient is :S.aureusS.epidermidisEnterococcusViridans Streptococci  <response>: i.v. drug abusersLt. sided endocarditis EnterococcusRt. sided endocarditis S.aureus 