A 50 year old man with poor dentition presents with fever, malaise, and a new heart murmur 2 weeks after a dental extraction. Blood cultures grow alpha hemolytic gram positive cocci that are optochin resistant and bile insoluble. Echocardiography reveals a vegetation on a previously abnormal mitral valve. Which of the following organisms is the most likely cause?
- A)Staphylococcus aureus
- B)Streptococcus viridansGABARITO
- C)Staphylococcus epidermidis
- D)Pseudomonas aeruginosa
- E)Enterococcus faecalis
Explicação
Subacute infective endocarditis after dental work on a previously damaged valve is classically caused by Streptococcus viridans. These alpha hemolytic, optochin resistant, bile insoluble organisms synthesize dextrans that facilitate adherence to fibrin platele... Ver explicação completa e trilha adaptativa →