Treatment Approach for Multiply-Relapsed Enterococcal Prostatitis

Introduction to Treatment

The American Heart Association recommends management of relapsed enterococcal infections should involve infectious disease consultation as standard of care, which is a Class I recommendation 2, 3, 1

High-dose daptomycin 10-12 mg/kg/day IV PLUS ampicillin 2g IV every 6 hours (8g/day total) for 8 weeks is recommended for ampicillin-susceptible cases, as the American Heart Association explicitly states that ampicillin-daptomycin combinations demonstrate the greatest synergistic activity for enterococcal infections compared to other combinations 1
Linezolid 600 mg PO or IV every 12 hours for 6 weeks has demonstrated 80-86% success rates for chronic enterococcal prostatitis, particularly if ampicillin cannot be used 1

Weekly CPK monitoring during high-dose daptomycin therapy is necessary due to significant myopathy risk, and treatment should be discontinued immediately if CPK rises significantly or if muscle pain/weakness develops 1
Weekly complete blood counts are mandatory if linezolid treatment exceeds 2 weeks due to myelosuppression risk 1

Initial symptom improvement should occur within 5-7 days, with more complete clinical response expected in 10-14 days, and microbiological documentation of cure at 2-4 weeks 1

Daptomycin monotherapy should not be accepted, and combination therapy with ampicillin should be insisted upon if susceptible 1
Standard-dose daptomycin (6 mg/kg/day) should not be used, and high-dose (10-12 mg/kg/day) should be used for prostatic infections 1
Weekly CPK monitoring should not be skipped, as myopathy is a real risk with prolonged high-dose therapy 1
Treatment should not be given for less than 6 weeks, as relapses indicate inadequate treatment duration 1