Treatment of CRBSI Caused by Staphylococcus haemolyticus

Empirical Antibiotic Therapy

The Infectious Diseases Society of America recommends starting empirical therapy with vancomycin to cover coagulase-negative staphylococci, including S. haemolyticus, which are the most common pathogens in CRBSI 1, 3, 4
Add gram-negative coverage, such as a third-generation cephalosporin, carbapenem, or β-lactam/β-lactamase combination, based on local antibiogram until culture results are available 1
Consider alternative agents, such as daptomycin or linezolid, if vancomycin MIC is >1 mg/mL or clinical failure occurs 4

The Infectious Diseases Society of America recommends removing short-term catheters immediately and inserting a new catheter at a different site 1, 2
For long-term catheters, attempt catheter salvage with systemic antibiotics plus antibiotic lock therapy for 10-14 days, but remove the catheter if fever or bacteremia persists beyond 72 hours 1, 2, 5
Remove the catheter if clinical deterioration, hemodynamic instability, or evidence of metastatic infection occurs 1, 3, 5

The Infectious Diseases Society of America recommends 5-7 days of systemic antibiotics for uncomplicated CRBSI with catheter removal 5, 6
For uncomplicated CRBSI with catheter retention, treat with systemic antibiotics plus antibiotic lock therapy for 10-14 days 1, 3, 5
Extend therapy to 4-6 weeks for persistent bacteremia or complicated infections, such as endocarditis or osteomyelitis 1, 5

Combine vancomycin or daptomycin with heparin and instill into each catheter lumen 2
Never use antibiotic lock therapy alone; it must be combined with systemic antibiotics 1, 2

Obtain repeat blood cultures 72 hours after initiating therapy to document clearance 5, 7
Assess for clinical improvement, such as defervescence and resolution of hemodynamic instability, within 48-72 hours 3, 5

For hemodialysis patients with S. haemolyticus CRBSI, guidewire exchange is an acceptable alternative to immediate removal if symptoms resolve within 2-3 days and there is no metastatic infection 1, 2
Use validated dosing schedules for vancomycin to ensure therapeutic concentrations in dialysis patients 2

Do not treat with antibiotics alone without addressing the catheter, as this leads to recurrence in the majority of cases 2
Do not delay catheter removal if bacteremia persists >72 hours, as this increases the risk of metastatic complications and mortality 1, 4