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In what ways contamination can be prevented?

This Premium Q&A, reviewed and published, features a real conversation between an iCliniq user and a physician.

Patient's Query

Hello, Doctor,

I am an infection preventionist at a nursing facility where we have just confirmed our first case of Candida auris in a resident who was recently transferred from a hospital. The state health department is involved, and we are implementing enhanced precautions, but I have several questions regarding management.

First, what is the most effective environmental cleaning agent? I have read that standard quaternary ammonium compounds are ineffective. Should we be screening roommates or other residents with risk factors for colonization? What is the recommended approach for staff screening, especially since many of them work at multiple facilities?

Most concerning is our limited infrastructure for proper isolation. The facility was designed with shared rooms and bathrooms, with only two private rooms available. I am also worried about the decontamination of shared equipment such as vital signs machines and patient lifts.

How long does colonization typically persist, and what are the criteria for discontinuing enhanced precautions?

Our administration is concerned about costs, but I am deeply worried about the potential for an outbreak among our high-risk population, where residents average more than three comorbidities.

Finally, what is the mortality rate if colonization progresses to invasive infection in elderly patients?

Kindly help.

Hello,

Welcome to icliniq.com.

I read your query and can understand your concern.

You’re asking truly important and thoughtful questions. I can feel your genuine concern, and it’s absolutely valid. This situation urgently needs careful, focused infection prevention steps, especially because your facility cares for such a vulnerable population and is working with real infrastructure challenges.

Recommended Actions

Environmental Cleaning:

  1. You are absolutely right; standard quaternary ammonium compounds (disinfectant class) are not effective against Candida auris.
  2. Use EPA (Environmental Protection Agency)-registered disinfectants from List P.
  3. Choose products listed on the Environmental Protection Agency (EPA) list P (effective against Candida auris).

Widely Effective Agents:

  1. Sodium hypochlorite (disinfectant—bleach-based).
  2. Hydrogen peroxide + peracetic acid (disinfectant combination).
  3. Some accelerated hydrogen peroxide formulations (e.g., Oxivir TB); always check EPA List P for confirmation.

Key Practice:

  1. First clean, then disinfect. Candida auris can persist on surfaces and equipment for weeks if not thoroughly decontaminated.
  2. Screening roommates and high-risk residents.
  3. Yes, screening of roommates and high-risk contacts is strongly recommended.
  4. Current or past roommates of the colonized resident.
  5. Residents who have shared equipment, healthcare workers, or communal spaces.

High-Risk Individuals:

  1. Tracheostomies.
  2. Indwelling devices.
  3. Frequent healthcare exposure.
  4. Recent antibiotic or antifungal use.
  5. Use composite skin swabs (axilla and groin) and swab any device insertion sites.

Staff Screening:

  1. Evidence of ongoing transmission.
  2. No clear source.
  3. Suspected staff-to-resident transmission.

Best Practices:

  1. Implement staff cohorting when possible.
  2. Avoid staff rotation between colonized and non-colonized residents.
  3. Enforce strict hand hygiene, gown and glove use, and proper Personal Protective Equipment (PPE) compliance.
  4. Encourage transparency if staff work at multiple high-risk facilities.

Isolation Challenges and Infrastructure Limits: This is a major challenge in long-term care facilities (LTCFs), particularly with shared rooms.

Adopt a Tiered Approach:

  1. Assign private rooms with private bathrooms.
  2. Apply enhanced contact precautions (gown, gloves, strict hand hygiene).

When Private Rooms Are Unavailable:

  1. The cohort colonized residents together.
  2. Avoid placing colonized individuals with those who are severely immunocompromised or have open wounds or are ventilator-dependent.
  3. Use privacy curtains and clear signage.
  4. Dedicate medical equipment or disinfect thoroughly between uses.

Decontamination of Shared Equipment:

  1. This is critical; Candida auris survives well on shared surfaces.
  2. Assign dedicated equipment whenever feasible.
  3. Otherwise, disinfect thoroughly after each use with EPA List P agents.
  4. Consider ultraviolet (UV) disinfection or vaporized hydrogen peroxide systems for items that are difficult to clean.
  5. Regularly document and audit disinfection practices.

Colonization Duration and Ending Precautions:

  1. Colonization can persist for months or even years.
  2. There is no standard timeframe for decolonization.
  3. The Centers for Disease Control and Prevention (CDC) does not recommend discontinuing precautions based on negative surveillance cultures alone.
  4. Precautions should remain.
  5. Indefinitely for residents in congregate care or until discharge from the facility.
  6. Discontinuation may be considered after case-by-case evaluation with public health authorities.

Mortality and Progression Risk:

  1. The risk of progression from colonization to invasive infection is high.
  2. The invasive Candida auris infection mortality rate ranges from 30 to 60 percent.

Factors That Increase Risk:

  1. Use of indwelling medical devices.
  2. ICU (intensive care unit) stays.
  3. Broad-spectrum antibiotic use.
  4. Severe underlying illness.

Balancing Cost and Outbreak Risk:

  1. Increased resident morbidity and mortality.
  2. Emergency staffing needs.
  3. Room closures and negative inspections.
  4. Public health investigations and citations.
  5. Damage to facility reputation and licensure.
  6. Proactive control is significantly more cost-effective than reactive outbreak management.

I hope this helps.

Thank you.

Medically reviewed byiCliniq medical review team

Published At June 18, 2025
Reviewed AtJune 24, 2025

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