Microbiology A patient of RHD developed infective endocarditis after dental extraction. Most likely organism causing this is : A Streptococcus viridans B Streptococcus Pneumoneae C Streptococcus Pyogenes D Staphylococcus aureus 💡 Explanation A patient of RHD developed infective endocarditis after dental extraction. Most likely organism causing this is : ✓ Correct Answer: A. Streptococcus viridans