The treatment of choice for<unk>  in endocarditis is the third-generation cephalosporin and β-Lactam antibiotic ceftriaxone. Ampicillin (a penicillin), combined with low-dose gentamicin (an aminoglycoside) is another therapeutic option.
HACEK organisms
Enteric bacteria 
Coliform bacteria
Streptococcus
Enterococcus
Haemoconia
Lactobacillus
Nontuberculous mycobacteria