Can We Do Better? Rethinking Floors, Shoes, and an Overlooked Contamination Pathway

In pharmaceutical and healthcare environments, contamination control often focuses on the obvious: air handling, surfaces, hand hygiene, gowning, and validated cleaning protocols. Entire programs are built around these pillars. Budgets are allocated, staff are trained, and auditors know exactly where to look. But one persistent pathway continues to be underestimated: floors and shoes.

Every day, people move between corridors, staging areas, gowning spaces, production rooms, and support zones. Shoes contact everything the floor collects , dust, residue, moisture, and microbial burden , then carry that material forward with every step. In many facilities, this risk is acknowledged indirectly through policies around traffic flow, cleanable flooring, and shoe covers. Still, the practical question remains: can we do better?

Understanding the Risk

Floors are among the most heavily trafficked surfaces in any controlled environment, yet they are often treated as a secondary concern compared to benchtops, equipment, or air quality. The assumption, sometimes unstated, is that what happens at floor level stays at floor level. But that assumption does not hold up under scrutiny.

Research has demonstrated that floors in healthcare and pharmaceutical settings can harbor a wide range of microorganisms, including resistant organisms, that persist despite regular cleaning. More importantly, footwear is an efficient vector. Studies examining bacterial transfer from floors to other surfaces via shoe soles have shown that contamination can be carried remarkable distances , and that a single contaminated shoe can affect a surprisingly large area in a short amount of time. The mechanics are straightforward: every footfall is a potential transfer event.

This does not mean floors are the dominant contamination risk in a well-run facility. But in environments where the goal is to minimize every controllable source of contamination, ignoring a documented pathway because it is logistically inconvenient is difficult to justify.

The Limits of What We Currently Do

Shoe covers are the most common response to footwear contamination, and they are not without value. They create a physical barrier between outdoor or general-area footwear and the controlled environment.

But shoe covers come with tradeoffs that are worth examining honestly. They are consumable-dependent, which means

Recurring cost
Ongoing inventory management
Waste stream burden
Human variability

They can tear, fit inconsistently, be applied incorrectly, and can create bottlenecks in gowning workflows. In busy facilities with high staff throughput, the margin for inconsistency grows. One person applies them properly; another rushes. One shift maintains strict compliance; the next grows lax.

Most importantly, shoe covers do not actively reduce microbial load on footwear. They create a barrier, but they are not an antimicrobial intervention. If the shoe underneath is contaminated, the cover contains that contamination in place , it does not neutralize it. Remove the cover improperly, and whatever was on the shoe now has a pathway to your hands, your gloves, the gowning bench.

The Stakeholder Perspective

Footwear hygiene looks different depending on where you sit in an organization, but it is a problem for virtually everyone involved in facility operations.

UVZone Shoe Sanitizing Station

A device that uses UV-C and ozone to sanitize shoe soles

Enhances traditional hygiene protocols

UVZone® uses a factory-set treatment cycle of 6, 8, or 10 seconds. Both shoe soles are treated during the same activated cycle.

UVZone® is intended to complement a broader contamination-control, hygiene, infection-prevention, or biosecurity program. It does not independently establish compliance or guarantee a facility-specific result.

Rethinking "Good Enough"

The broader message here is not that shoe covers have no role. In many settings, they remain appropriate as part of a layered approach, as a backup measure, or in combination with other controls. The argument is not against shoe covers. It is against the assumption that they fully address the problem.

But in controlled environments, where the cost of a contamination event can range from product loss and recalls to patient harm, the standard for "good enough" should be high. Floors and shoes remain an underappreciated vector. In a space where every other vector is analyzed, documented, and controlled to the extent possible, we need to follow suit with floors and shoes.

The question is not whether the floor-shoe pathway carries risk. It does. The question is whether the current response to that risk is proportionate, consistent, and genuinely effective or whether it is simply familiar.

The first step toward a cleaner facility may be right at our feet.

Application Limits

UVZone® treats the undersides of shoes during an activated treatment cycle. It does not continuously treat the room, the facility, or the footwear after the user steps off the station.

If footwear requires physical cleaning, that cleaning step remains necessary. If your procedure requires chemical treatment, shoe covers, dedicated footwear, hand hygiene, personal protective equipment, environmental cleaning, sanitation, traffic controls, or another facility control, that requirement remains in place until the responsible facility team approves a change.

Third-Party Lab Verified Efficacy. Selected results shown. Full laboratory reports are available upon request. Testing conducted from 2019 through 2022.

Efficacy claims based on independent laboratory testing. Results may vary based on application conditions. Patho3Gen technology is designed for environmental surface sanitation and is not intended to diagnose, treat, cure, or prevent any disease. Always follow manufacturer guidelines and applicable regulations.