Do Not Treat Asymptomatic E. faecalis Bacteriuria
You should NOT treat Enterococcus faecalis in urine culture when the patient has no symptoms. This is a strong recommendation supported by multiple high-quality guidelines and applies to nearly all patient populations 1.
The Evidence Against Treatment
The 2024 European Association of Urology guidelines provide the most current and explicit guidance, giving a strong recommendation to NOT screen or treat asymptomatic bacteriuria (ABU) in 1:
- Women without risk factors
- Patients with well-regulated diabetes mellitus
- Postmenopausal women
- Elderly institutionalized patients
- Patients with dysfunctional/reconstructed lower urinary tract
- Renal transplant recipients
- Patients before arthroplasty surgery
- Patients with recurrent UTIs
The 2019 IDSA guideline reinforces this approach, emphasizing that antimicrobial stewardship programs have identified treatment of asymptomatic bacteriuria as a major contributor to inappropriate antimicrobial use and resistance development 2.
Why Not Treating Is Better for Patients
Asymptomatic bacteriuria may actually be protective. Clinical studies demonstrate that ABU can protect against superinfecting symptomatic UTI 1. When you treat asymptomatic colonization, you risk:
- Selecting for antimicrobial-resistant organisms
- Eradicating potentially protective bacterial strains
- Exposing patients to adverse drug effects
- Increasing risk of Clostridioides difficile infection 3
- Promoting allergic reactions 3
The evidence shows that treating asymptomatic bacteriuria does NOT improve patient outcomes in terms of morbidity, mortality, or quality of life for most populations 4, 5.
The Two Exceptions Where Treatment IS Indicated
You MUST treat asymptomatic bacteriuria in only two scenarios:
Pregnant women - Screen and treat with standard short-course therapy or single-dose fosfomycin (weak recommendation due to older study quality) 1
Before urological procedures that breach the mucosa - Screen and treat (strong recommendation) 1
Common Pitfalls to Avoid
The biggest mistake: Ordering urine cultures on asymptomatic patients. A positive culture often drives inappropriate treatment regardless of symptoms 2, 3. The solution is simple: only obtain urine cultures when clinically indicated by symptoms or in the two exceptions above 3.
Don't be fooled by: Nonlocalizing symptoms in elderly or catheterized patients. These populations have high prevalence of bacteriuria (25-50% in long-term care facilities), and vague symptoms rarely indicate true UTI 2.
If E. faecalis Is Found Incidentally
- Document that the patient is asymptomatic
- Do NOT initiate antibiotics
- Remove indwelling catheters if present 6
- Educate the patient that bacteria in urine without symptoms is colonization, not infection
- Only reassess if symptoms develop (dysuria, frequency, urgency, fever, flank pain)
The antimicrobial stewardship imperative is clear: given rising resistance patterns in enterococci (including VRE) 6, 7, 8, avoiding unnecessary treatment of asymptomatic bacteriuria is critical for both individual patient safety and public health.