The term “redundant organisms” refers to infective endocarditis, which is an infection of the endocardium, heart valves, or the endothelium of neighboring large vessels caused by pathogenic microorganisms through the bloodstream pathway, accompanied by redundant organisms, and the common pathogens are streptococcus, and staphylococcus, especially Aureus, and enterococci, have been increasing in recent years. According to the type of valve involved, infective endocarditis can be categorized into autologous valve infective endocarditis and prosthetic valve infective endocarditis, and according to the urgency of the disease can be categorized into acute infective endocarditis, as well as subacute infective endocarditis, the incidence of men is higher than that of women, and the incidence of men and women is gradually higher with the increase of age.