A patient of RHD developed infective endocarditis after dental extraction. Most likely organism causing this is -: (A) Streptococcus viridans, (B) Streptococcus pneumoniae, (C) Streptococcus pyogenes, (D) Staphylococcus aureus
Answer is A. Viridans streptococci Commensals in the mouth and upper respiratory tract. Cause transient bacteremia following tooth extraction or other dental procedures; -MC cause of subacute endocarditis: Streptococcus Viridans - MC Streptococcal species in Viridans group causing endocarditis: S. sanguis mc cause of Native valve endocarditis : S. aureus