Why is eradicating bacteria from the fibrin-platelet thrombus difficult in infective endocarditis (IE)?

Updated: Jan 03, 2019
  • Author: John L Brusch, MD, FACP; Chief Editor: Michael Stuart Bronze, MD  more...
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Answer

Eradicating bacteria from the fibrin-platelet thrombus is extremely difficult because (1) the high concentration of organisms present within the vegetation (ie, 10-100 billion bacteria per gram of tissue), (2) their position deep within the thrombus, (3) their location in both a reduced metabolic and reproductive state, and (4) the interference of fibrin and white cells with antibiotic action. For all of these reasons, bactericidal antibiotics are considered necessary for cure of valvular infection.


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