Duke's Criteria

BE FEVEER
(*BE - Bacterial Endocarditis)

Major:
B = blood culture +ve >2 times 12 hr part
E = Endocardial involvement from Echo

Minor:
F = Fever
E = Echo findings (not fulfilling a major)
V = Vascular findings [Janeway lesion]
E = Evidences from microbiologic

E = Evidences from immunology [Osler's node, Roth spot, rheumatoid factor]
R = Risk factors/predisposing factors - drug abuse, valvular diseases

To diagnose IE:

2 major

or

1 major + 3 minor

or

5 minor