Understanding Antimicrobial Stewardship in Skilled Nursing Facilities Through a Complex Adaptive Systems Perspective: A Qualitative Study in Southern Arizona

This qualitative study of skilled nursing facilities in Southern Arizona reveals that effective antimicrobial stewardship implementation is best understood as a complex adaptive system shaped by organizational workflows, care transitions, and staff interactions, rather than solely by individual prescribing decisions.

The Gist

The Big Picture: The "Over-Protective Parent" Problem

Imagine a Skilled Nursing Facility (SNF) as a large, busy retirement home where many elderly residents live together. These residents are often frail and have weak immune systems, making them very vulnerable to infections.

The doctors and nurses there face a tough dilemma: They are like over-protective parents. If a resident gets a little confused or has a smelly urine sample, the staff's first instinct is often to say, "We can't risk it! Let's give them antibiotics just in case."

While this feels safe in the moment, doing this too often is like spraying bug spray everywhere, even when there are no bugs. Over time, the "bugs" (bacteria) get stronger and learn to ignore the spray. This creates "superbugs" that are hard to kill, and it also makes the residents sicker in the long run due to side effects.

This paper is about a study done in Arizona to figure out why these facilities keep over-prescribing antibiotics and how they can fix it.

---

The Core Idea: The Facility is a Living Ecosystem

The researchers didn't just look at the doctors' decisions. Instead, they looked at the whole facility as a Complex Adaptive System.

The Analogy: A Busy Ant Colony
Think of the nursing home not as a building with a list of rules, but as a busy ant colony.

• In an ant colony, no single ant is the "boss" of everything. The colony survives because of how the ants talk to each other, how they move food, and how they react to danger.
• Similarly, in a nursing home, the decision to give antibiotics isn't just made by the doctor. It's influenced by the nurse who smells the urine, the housekeeper who sees the patient fall, the administrator who worries about lawsuits, and the hospital that sent the patient there.

The study found that you can't fix antibiotic overuse just by telling one doctor to "be better." You have to fix the whole colony's communication and flow.

---

What They Found: The Good and The Bad

The researchers interviewed 57 people (doctors, nurses, administrators, and even housekeepers) across 10 different facilities. They found two main types of themes: "System Themes" (how the colony is built) and "Influencer Themes" (what pushes or pulls the decisions).

1. The System Themes (The Structure of the Colony)

• Everyone is Connected: A nurse can't order a test, but a housekeeper can tell the nurse, "Hey, the urine smells weird." The nurse then calls the doctor. If the doctor isn't there, the decision gets delayed, and the nurse might just give the antibiotic to be safe.
• The "Safety vs. Stewardship" Tug-of-War:
  • The Individual Lens: "I need to make sure this specific patient doesn't get sick today." (Result: Give antibiotics).
  • The Population Lens: "If we give antibiotics to everyone, we create superbugs that will hurt everyone next year." (Result: Wait and watch).
  • The Conflict: The fear of the patient getting sick right now usually wins, leading to over-prescribing.
• The Hospital Handoff (The Broken Bridge): When a patient comes from a hospital to the nursing home, it's like a relay race where the baton is dropped. The hospital often sends the patient with a bag of meds but forgets to write down why they are taking them or how long they should take them. The nursing home staff then just keeps the patient on the meds because they don't have the full story.
• The Gatekeepers vs. The Drivers: The administrators and nurses often want to follow the rules (they are the "Stewardship Champions"), but the doctors hold the keys to the car (they are the "Prescribers"). If the driver doesn't listen to the navigator, the car goes the wrong way.

2. The Influencer Themes (What Helps or Hurts)

The Helpers (Facilitators):

• Talking to Each Other: When the housekeeper, nurse, and doctor talk openly and quickly, they can figure out if an infection is real or just a false alarm.
• Education: When everyone—from the CEO to the cleaning crew—understands why antibiotics are dangerous, they all start acting like a team.
• The "Champion": Every facility needs a hero (usually an Infection Preventionist or a dedicated nurse) who constantly reminds everyone, "Let's check the labs before we prescribe!"

The Hinderers (Barriers):

• "Old School" Habits: Many doctors were trained years ago to treat confusion as an infection. Even though we know better now, they still do it out of habit.
• Waiting Game: Lab results take time. If a doctor has to wait 24 hours for a test result, they might just prescribe the antibiotic now to be safe, rather than waiting.
• Broken Communication: If the hospital doesn't tell the nursing home what's going on, the nursing home is flying blind.

---

The Solution: Fixing the Ecosystem

The paper concludes that you cannot fix this problem by just handing out a checklist to the doctors. That's like trying to fix a traffic jam by telling one car to drive faster.

The Real Fix:

1. Bridge the Gap: Hospitals and nursing homes need to talk better. When a patient moves, the "story" of their treatment must move with them perfectly.
2. Change the Culture: We need to shift the mindset from "Treat everything immediately" to "Treat only what we know is there."
3. Empower the Team: Nurses and other staff need to feel safe telling doctors, "Are we sure we need this?" without fear of being yelled at.

The Takeaway

Think of Antimicrobial Stewardship not as a rulebook, but as orchestrating a symphony. If the violins (nurses), the drums (administrators), and the conductor (doctors) aren't listening to each other, the music sounds terrible (and dangerous).

To stop the rise of superbugs, we need to stop looking at the doctor as the only person responsible and start fixing the entire system so that everyone works together to use antibiotics only when they are truly necessary.

Technical Summary

1. Problem Statement

Antimicrobial resistance (AMR) is a critical public health threat driven by the non-judicious use of antibiotics. Skilled Nursing Facilities (SNFs) present unique challenges for Antimicrobial Stewardship (AMS) due to their congregate living settings, medically complex resident populations (often >65 years old with multiple comorbidities), and high rates of diagnostic uncertainty.

• Current Status: Over 70% of SNF residents receive antibiotics annually, with 40–75% of these prescriptions deemed inappropriate or non-compliant with guidelines.
• Specific Challenges: Prescribing is often driven by "defensive medicine" (e.g., treating asymptomatic bacteriuria or confusion as infection), lack of diagnostic resources, fragmented care transitions between hospitals and SNFs, and varying prescriber practices.
• Gap: While the CDC has established "Core Elements" for AMS in nursing homes, implementation rates remain low (e.g., only 18% of surveyed Arizona facilities met all core elements in 2016). There is a lack of understanding regarding the mechanisms and organizational dynamics that hinder or facilitate AMS implementation within the complex environment of SNFs.

2. Methodology

The study employed a systematic grounded theory approach using qualitative methods to generate a substantive theory of AMS implementation.

• Setting & Sampling: Conducted in Southern Arizona between April and December 2019. Ten SNFs were randomly sampled to represent three distinct strata: urban/suburban (Phoenix-Tucson corridor), border (within 100km of the US-Mexico border), and rural.
• Participants: 57 semi-structured interviews were conducted with a diverse range of staff to ensure maximum heterogeneity:
  • Administrators: Executive Directors, Medical Directors, Directors of Nursing (DON), Infection Preventionists (IP).
  • Clinical Providers: Registered Nurses (RN), Certified Nursing Assistants (CNA).
  • Non-Clinical Staff: Housekeeping and Environmental Services.
• Data Collection: Interviews lasted 60–90 minutes, were audio-recorded, transcribed verbatim, and anonymized. A semi-structured guide based on CDC frameworks and literature was used.
• Data Analysis: Transcripts were analyzed using NVivo 12 software via constant comparative analysis. The process involved:
  • Directed coding (based on existing literature) and emergent coding (inductive).
  • Three reviewers independently coded six interviews to establish inter-rater reliability ($\kappa=0.8$).
  • Iterative coding to identify overarching themes and relationships, culminating in the development of a Complex Adaptive Systems (CAS) framework.

3. Key Contributions

The primary theoretical contribution of this study is the application of the Complex Adaptive Systems (CAS) lens to AMS in SNFs.

• Shift in Perspective: The study moves beyond viewing AMS as a series of individual prescribing decisions. Instead, it frames SNFs as dynamic systems where outcomes emerge from the interactions of diverse agents (staff roles), feedback loops, and nested levels of influence.
• Dual-Thematic Framework: The authors categorize findings into two complementary perspectives:
  1. System Themes: Organizational structures, roles, and relationships that shape the context.
  2. Influencer Themes: Specific barriers and facilitators operating within those systems.
• Identification of "Feedback Loops": The study highlights how positive loops (e.g., strong IP-Physician relationships) and negative loops (e.g., poor hospital-SNF communication) drive stewardship outcomes.

4. Results

The analysis identified two major thematic categories:

A. System Themes (Organizational Dynamics)

1. Interactions Among Multiple Roles: AMS is influenced by all staff, not just prescribers. Front-line staff (CNAs, RNs) act as early detectors (e.g., identifying "smelly urine") but are often constrained by hierarchy.
2. Shifting Lens (Individual vs. Population): A fundamental tension exists between the individual-level lens (fear of missing an infection in a specific patient, leading to over-prescribing) and the population-level lens (concern for resistance and public health). Clinicians often prioritize immediate patient safety over long-term stewardship.
3. Care Transition Policies: The flow of information between hospitals and SNFs is critical. Negative feedback loops occur when discharge paperwork lacks antibiotic rationale or duration, forcing SNFs to guess or continue inappropriate therapy.
4. Prescribers vs. Stewardship Champions: A distinction exists between those who prescribe and those who steward. AMS success relies heavily on whether prescribers act as "champions" or barriers. Positive relationships between IPs/DONs and prescribers create facilitative feedback loops.

B. Influencer Themes (Barriers and Facilitators)

• Communication:
  • Facilitator: Effective intra-facility communication (lateral and hierarchical) and clear shift handoffs.
  • Barrier: Poor inter-facility communication (hospital-to-SNF), specifically missing data on indication and duration of therapy upon transfer.
• Education & Tracking:
  • Facilitator: Ongoing, role-specific education for all staff (including CNAs and families) and the use of digital tracking systems.
  • Barrier: Lack of awareness among non-clinical staff and physicians; reliance on manual tracking or outdated software.
• Human Resources: Smaller teams can sometimes enhance accountability and protocol adherence, while large, fragmented teams may dilute responsibility.
• Enculturated Prescribing Norms: Deeply ingrained "old-school" practices (e.g., treating confusion as a UTI and prescribing immediately) remain a significant barrier, often overriding evidence-based guidelines.
• Diagnostic Resources: Delays in lab turnaround times force clinicians to prescribe broad-spectrum antibiotics empirically ("killing whatever it is") before results are available.

5. Significance and Implications

• Policy Implications: The study suggests that current CDC Core Elements, while necessary, are insufficient if they do not address inter-facility coordination. The "Care Transition" gap is a critical area not fully addressed by current guidance.
• Intervention Design: AMS interventions must be systems-level rather than solely educational or individual-focused. Strategies should include:
  • Strengthening communication protocols during hospital discharges.
  • Empowering "champions" (IPs, DONs) to bridge the gap with prescribers.
  • Aligning the "individual safety" mindset with "population health" goals through feedback mechanisms.
• Theoretical Impact: By validating the CAS framework in SNFs, the study provides a robust model for understanding why piecemeal interventions fail and how organizational culture, role tension, and external system interactions dictate stewardship success.
• Limitations: Data was collected pre-pandemic (2019), though the authors argue the identified systemic barriers (roles, transitions, culture) remain relevant. The sample size (10 facilities) limits generalizability but maximizes contextual diversity.

Conclusion: Effective AMS in SNFs requires recognizing these facilities as complex adaptive systems. Success depends on coordinating internal workflows, resolving role tensions, and establishing robust feedback loops with external healthcare partners (hospitals), rather than focusing solely on individual prescribing behaviors.