Infection Control — Apply infection control procedures and universal precautions

Historical Context & Motivation

For centuries, infectious disease was the leading cause of death in hospitals and clinical settings, yet the mechanisms of disease transmission remained largely unknown. The idea that invisible organisms could cause illness was revolutionary, and the practices that ultimately became infection control emerged from hard-won scientific discoveries. Occupational therapy assistants today practice in environments—rehabilitation units, skilled nursing facilities, acute care hospitals, and community clinics—where vulnerable populations are particularly susceptible to healthcare-associated infections (HAIs). Understanding the historical arc of infection control is not merely academic; it grounds the COTA's daily clinical behavior in evidence and professional responsibility.

The central question that this lesson addresses is both clinical and ethical: How does a COTA consistently apply infection control procedures across diverse practice settings to protect clients, families, colleagues, and themselves? The answer requires fluency with the chain of infection, familiarity with regulatory standards, and the ability to integrate these precautions seamlessly into therapeutic interventions without compromising client-centered care.

Core Principles & Definitions

Infection control in occupational therapy practice rests on a set of foundational principles established by the CDC, the Occupational Safety and Health Administration (OSHA), and state licensure boards. These principles are operationalized through daily clinical behaviors—from hand hygiene before and after every client interaction to the correct donning and doffing of personal protective equipment (PPE). The NBCOT exam expects COTAs to demonstrate competence not only in knowing the rules but in applying them to realistic clinical scenarios involving OT-specific contexts such as splint fabrication, ADL training with shared equipment, and therapeutic activities using communal materials.

The Chain of Infection — Visual Explanation

The chain of infection is a conceptual model that illustrates the six sequential links required for an infectious disease to spread from one host to another. Understanding this chain is clinically powerful because the COTA can target interventions at each link. The diagram below depicts the chain as a circular process, emphasizing that transmission is cyclical—each new infection can restart the cycle—and that breaking any single link is sufficient to halt transmission.

In OT practice, the COTA interacts with multiple links daily. When fabricating a thermoplastic splint, the clinician's hands and the materials function as potential modes of transmission (contact). Open wounds on a client's skin serve as portals of entry. Clients who are immunocompromised—whether from chemotherapy, advanced age, or chronic disease—are susceptible hosts. By wearing gloves, disinfecting materials, and performing hand hygiene, the COTA breaks the chain at multiple points simultaneously, dramatically reducing infection risk.

How Standard & Transmission-Based Precautions Work

Standard Precautions represent a paradigm shift in infection control philosophy. Rather than relying on a diagnosis to determine whether protective measures are necessary—a model that fails because many infectious individuals are asymptomatic or undiagnosed—Standard Precautions assume that every person could harbor a transmissible pathogen. This assumption eliminates the guesswork and ensures uniform protection. For the COTA, this means that infection control behaviors are not episodic responses to specific diagnoses but rather embedded routines performed with every client encounter.

Components of Standard Precautions

• Hand Hygiene — Performed before and after every client contact, after contact with potentially contaminated surfaces, before donning gloves, and immediately after removing gloves. Alcohol-based hand rub is preferred unless hands are visibly soiled or the client has a C. difficile infection (requiring soap and water).
• PPE Selection — Determined by the nature of anticipated exposure. Gloves for any contact with blood, body fluids, mucous membranes, or non-intact skin. Gown when clothing may contact body fluids. Mask and eye protection when splashes or sprays are possible.
• Respiratory Hygiene / Cough Etiquette — Provide tissues and no-touch waste receptacles; instruct symptomatic clients to cover their mouth and nose when coughing or sneezing; maintain spatial separation (≥3 feet) when feasible.
• Safe Handling of Contaminated Equipment — Reusable equipment (e.g., therapy putty, goniometers, dynamometers) must be cleaned and disinfected between clients. Single-use items must be disposed of properly.
• Environmental Controls — Treatment surfaces, mat tables, and wheelchair cushions must be cleaned with hospital-grade disinfectant. Linens and laundry are handled to minimize agitation and microbial dispersal.

Transmission-Based Precautions

PPE Donning & Doffing — Detailed Breakdown

Correct sequencing of donning (putting on) and doffing (removing) PPE is one of the most clinically significant procedural skills a COTA must master. Errors in sequence—particularly during doffing—are the primary cause of self-contamination among healthcare workers. The CDC-recommended sequences are designed to ensure that the most contaminated items (gloves) are removed first, and that each subsequent removal minimizes contact with outer contaminated surfaces. The visual below illustrates the correct donning and doffing order.

Worked Example — Infection Control in an OT Session

The following scenario walks through the infection control decision-making process a COTA would use during a typical inpatient rehabilitation session. Each step identifies the relevant principle and the rationale behind it.

Comparing Precaution Levels — Strengths & Limitations

A common source of confusion for COTA candidates—and a frequent topic on the NBCOT exam—is distinguishing between Standard Precautions, Universal Precautions, Body Substance Isolation, and Transmission-Based Precautions. The table below clarifies the scope, strengths, and limitations of each approach, and the key takeaway provides a framework for remembering how they relate to each other in contemporary practice.

Connection to Advanced Practice & Emerging Issues

While foundational infection control principles remain stable, the landscape of healthcare-associated infections continues to evolve. The COTA must be prepared to adapt to emerging threats, institutional policy changes, and advances in infection prevention science. This section connects the core concepts already discussed to more advanced considerations that may appear on the NBCOT exam and that are increasingly relevant to practice.

Looking forward, COTAs will encounter increasing integration of infection prevention competencies into interprofessional practice frameworks. The Joint Commission, CMS, and state health departments are tightening HAI reporting requirements and linking infection rates to reimbursement through value-based purchasing programs. This means that infection control is no longer solely a clinical safety issue—it is also a financial and regulatory imperative. COTAs who understand this broader context can advocate for adequate infection control resources, participate meaningfully in quality improvement initiatives, and model best practices for students and colleagues.

Practice Problems

Infection Control — Summary & Review