When infective endocarditis is caused by a beta-lactam resistant Enterococcus species — particularly E. faecium — standard first-line beta-lactam therapy is not effective. The resistance profile of the causative organism determines which treatment combination is indicated.
This scenario requires a specific alternative combination regimen. Beta-lactam resistance in enterococcal IE significantly narrows the range of effective antibiotics, making organism identification and susceptibility testing critical to guiding therapy.
The recommended regimen for this scenario involves a combination of vancomycin and gentamicin. Therapy is administered over an extended course, with each agent given for a defined duration.
The complete regimen — including doses, routes, frequencies, and durations for both agents — is available in the full structured protocol below.
DOI: 10.1093/eurheartj/ehad193
In patients with IE due to beta-lactam resistant Enterococcus spp. (E. faecium), vancomycin for 6 weeks combined with gentamicin for 2 weeks is recommended using the following doses:
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