Intravenous followed by oral antimicrobial therapy for staphylococcal endocarditis

Area of Science:

• Infectious Diseases
• Cardiology
• Pharmacology

Background:

• Staphylococcal endocarditis is a severe infection requiring effective treatment.
• Valvular insufficiency is a common complication of Staphylococcus aureus endocarditis.
• Optimizing antimicrobial therapy duration and route is crucial for patient outcomes.

Purpose of the Study:

• To evaluate the efficacy and safety of a sequential intravenous (IV) followed by oral antimicrobial therapy regimen for staphylococcal endocarditis.
• To assess the role of serum bactericidal titers in monitoring treatment response.
• To determine if this regimen is well-tolerated and economical.

Main Methods:

• Retrospective analysis of 35 cases of staphylococcal endocarditis in 33 patients.
• Treatment involved initial IV antibiotics (sodium nafcillin or clindamycin) followed by oral antibiotics (dicloxacillin, oxacillin, clindamycin, or potassium penicillin V).
• Mean total treatment duration was 42.4 days (16.4 days IV, 26 days oral); serum bactericidal titers were monitored.

Main Results:

• All patients treated with the sequential IV-oral regimen achieved a cure.
• Serum bactericidal titers demonstrated similar activity for both IV and oral antimicrobial agents.
• The treatment regimen was found to be safe, effective, well-tolerated, and economical.

Conclusions:

• Sequential intravenous followed by oral antimicrobial therapy is a successful treatment strategy for staphylococcal endocarditis.
• Monitoring serum antibacterial activity can guide effective treatment.
• This approach represents a safe, effective, well-tolerated, and economical option for managing staphylococcal endocarditis.