Gram positive cocci. Some Abiotrophia have been renamed Granulicatella. Just to piss me off.
Penicillin +/- gentamicin. In vitro susceptibilities in one study (PubMed) were penicillin 8%; amoxicillin 92%; ceftriaxone 3%; meropenem 100%; and 100% for clindamycin, rifampin, levofloxacin, ofloxacin, quinupristin/dalfopristin, and vancomycin. Daptomycin works in vitro (PubMed).
Endocarditis does not respond well to therapy, often has emboli and valve failure.