Management of Staphylococcus aureus Bacteremia: A Guide for the ID ...
[Pages:2]Management of Staphylococcus aureus Bacteremia: A Guide for the ID Consult Service
1. Timely initiation of effective antibiotics following gram stain with GPCs in clusters 2. Timely change to -lactam therapy if MSSA
Oxacillin for endocarditis or meningitis
Cefazolin for patient without endocarditis or meningitis 3. Therapeutic vancomycin level
AUC of 400-600
4. Obtain repeat blood cultures every 24 ? 48 hours until documented clearance of bacteremia 5. Identify and control source of bacteremia 6. Echocardiography 7. Assess for potential treatment failure and adjust antibiotics
See reverse for recommended antibiotic adjustments 8. Treatment Duration
Uncomplicated bacteremia: 2 weeks Complicated bacteremia without endocarditis or osteomyelitis: at least 4 weeks Complicated bacteremia with endocarditis: at least 6 weeks Complicated bacteremia with osteomyelitis: at least 8 weeks
Uncomplicated bacteremia definition: no endocarditis, no implanted prostheses, no evidence of metastatic sites of infection, repeat blood cultures 2 ? 4 days are negative, AND defervesce within 72 hours of therapy
Antimicrobial Subcommittee Approval: 1/2021
P&T Approval: 2/2021
Last Revised: 11/2020
The recommendations in this guide are meant to serve as treatment guidelines for use at Michigan Medicine facilities. If you are an individual experiencing a medical emergency, call 911 immediately. These guidelines should not replace a provider's professional medical advice based on clinical judgment, or be used in lieu of an Infectious Diseases consultation when necessary. As a result of ongoing research, practice guidelines may from time to time
change. The authors of these guidelines have made all attempts to ensure the accuracy based on current information, however, due to ongoing research, users of these guidelines are strongly encouraged to confirm the information contained within them through an independent source.
If obtained from a source other than med.umich.edu/asp, please visit the webpage for the most up-to-date document.
Antibiotic Recommendations for MRSA Bacteremia
Scenario
Recommendation
Comments
First-line
First-line if vancomycin intolerance or allergy
Continued persistence of bacteremia4 beyond 5 days, despite therapy with
vancomycin or daptomycin
Vancomycin
Daptomycin 8 mg/kg IV q24h2,3
Continue exhaustive search and removal of uncontrolled foci of infection. Change in therapy may not be warranted in all
cases.
Combination therapy may be warranted and should be based on susceptibilities3.
The preferred regimen is daptomycin 8-10 mg/kg IV + ceftaroline 600 mg IV q8h
Vancomycin preferred for vancomycin MIC 21
Other alternatives include: ceftaroline 600 mg IV q8h3 or
linezolid 600 mg IV q12h4
Combination therapy can be de-escalated to monotherapy (daptomycin,
ceftaroline, or vancomycin) when blood cultures clear x48 ? 72 hours and patient
displays clinical improvement. Combination therapy generally given for
~5-7 days in most patients.
1 There is no significant effect of MIC on the risk of mortality with vancomycin therapy in MRSA bacteremia (Kalil JAMA 2014), and there is no clear data suggesting superior outcomes with daptomycin based on MRSA isolates with vancomycin MIC of 2 (van Hal CID 2013)
2 Daptomycin should not be utilized if the source of bacteremia is pulmonary. 3 Always confirm susceptibility of alternative antibiotics 4 Persistent MSSA bacteremia occurs less often than persistent MRSA bacteremia. In a small case series, the combination of Ertapenem
and Cefazolin rapidly cleared persistent MSSA bacteremia (Ulloa ER Clin Infect Dis 2020).
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