<prompt> Acute Infective Endocarditis with abscess formation is most commonly associated withListeriaStaphylococcusStreptococcusEnterococcus  <response>: Answer is B Staphylococcus Acute Infective Endocarditis with abscess formation is most commonly associated with staphylococcus. The most common organism causing acute infective endocarditis overall is staphylococcus aureus. Staphylococcus aureus endocarditis is paicularly virulent and associated with annular and myocardial abscess formation and a higher moality 