Unknown General 2b844355 Which of the following organism is seen in a patient of left-sided endocarditis involving the mitral valve? A Staphylococcus aureus B Streptococcus viridans C Enterococci D pseudomonas High-Yield Explanation Ans. BVegetations (arrows) due to viridans streptococcal endocarditis involving the mitral valve.