[Drug treatment of native valve infective endocarditis in patients not addicted to parenteral drugs].

Infectious endocarditis is an infection that is characterized by the presence of microorganisms in dense populations in vegetating lesions in the endocardium. Because phagocyte penetration to the interior of the vegetation is practically impossible, to cure infectious endocarditis, high doses of bactericidal antibiotics are administered, usually intravenously and for a long duration. In this article, antibiotic treatment is reviewed, depending on the isolated microorganism and in cases where necessary, treatment is initiated in an empirical manner. Once the microorganism was isolated, the recommended guidelines for antibiotic treatment have gone through some variations in recent years, due to the changing pattern of antibiotic sensitivity of some microorganisms, to the point of finding ourselves on occasion without an effective treatment (e.g. multiresistant enterococci). In addition, these variations are due to the introduction of new antibiotics that allow, in special cases, for the treatment to be administered on an outpatient basis. Using anticoagulation in infectious endocarditis is still considered controversial. In general, only patients having cardiac valvular prostheses seem to benefit from its use.