A 46 year old man with a history of mitral valve prolapse presents with 3 weeks of low grade fevers, fatigue, and weight loss. He underwent a dental extraction 1 month ago. Examination reveals a new regurgitant murmur and splinter hemorrhages. Blood cultures grow alpha hemolytic, optochin resistant gram positive cocci. Which of the following organisms is the most likely cause of this patient’s endocarditis?
- A)Staphylococcus aureus
- B)Viridans streptococciGABARITO
- C)Streptococcus gallolyticus
- D)Staphylococcus epidermidis
- E)Enterococcus faecalis
Explicação
Viridans streptococci is correct. This organism is normal oral flora and classically causes subacute infective endocarditis on previously damaged valves after dental manipulation. Alpha hemolysis with optochin resistance distinguishes it from Streptococcus pne... Ver explicação completa e trilha adaptativa →