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Related Experiment Videos

Parenteral prophylaxis against enterococcal endocarditis.

J Murillo, H C Standiford, B A Tatem

    The American Journal of the Medical Sciences
    |March 1, 1979
    PubMed
    Summary
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    Ampicillin plus streptomycin demonstrates superior bactericidal activity for preventing enterococcal endocarditis compared to penicillin-streptomycin. This combination is recommended for prophylaxis, especially against streptomycin-resistant strains.

    Area of Science:

    • Infectious Diseases
    • Pharmacology
    • Cardiology

    Background:

    • Enterococcal endocarditis is a serious infection requiring effective antibiotic prophylaxis.
    • Current prophylactic regimens vary in efficacy, necessitating comparative studies.

    Purpose of the Study:

    • To compare the in vitro bactericidal activity of three parenteral antibiotic regimens for enterococcal endocarditis prevention.
    • To identify the most effective antibiotic combination for prophylaxis.

    Main Methods:

    • A crossover study involving six healthy men.
    • Administration of three antibiotic regimens: streptomycin with procaine penicillin/aqueous penicillin G, streptomycin with intravenous ampicillin, and streptomycin with intramuscular ampicillin.
    • Assessment of bactericidal activity against enterococcal strains.

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    Main Results:

    • Ampicillin-streptomycin combinations (IV and IM) showed significant bactericidal activity (≥1:2 dilutions) against most strains.
    • The penicillin-streptomycin regimen exhibited less bactericidal activity.
    • All regimens were less effective against enterococcal strains highly resistant to streptomycin.

    Conclusions:

    • Ampicillin plus streptomycin is a preferred regimen for enterococcal endocarditis prophylaxis due to superior bactericidal activity.
    • The choice of antibiotic regimen is critical, particularly when dealing with streptomycin-resistant enterococci.