The challenge · From outdoors to indoors

Faeces, urine and residue: the street can come indoors.

Soles and paws contact what we find outside: soil, faeces, urine, dust and residue from treated areas. Studies also document microbiological contamination and material transfer into indoor spaces.

Visual representation of residue transfer from outdoors to indoor spaces

From outdoors to indoors

Transfer in three stages.

The process is simple: contact, transport and dispersion. Surfaces and quantities change, but the point of transition remains the moment when the two environments can still be separated.

Visible dirt collected from a surface
01 · Contact

What we can see

Soil, water and traces of faeces or urine can leave attached residue on paws and soles.

Illustration of particles that are difficult to detect
02 · Transport

What may go unnoticed

Bacteria, spores and chemical residue require specific analysis: the eye does not measure what is present.

Illustration of residue dispersion inside a home
03 · Dispersion

What travels further

Subsequent steps can spread residue through indoor spaces.

Illustrative visualisation of environmental residue and microorganisms near a shoe sole

Beyond visible dirt

Bacteria, viruses and pesticides: what studies document.

The evidence covers three distinct findings: microorganisms detected on soles and paws, herbicide residue entering homes after lawn treatments, and viral material detected in hospital wards. Each finding retains its own context.

Material picked up outside can travel beyond the door. The entrance is where inspection and treatment of soles and paws can be concentrated.
Soles and floors

Bacteria and spores on soles and paws.

Research has documented bacteria on soles and, in targeted household studies, spores on dog paws. Detection describes contamination, not the frequency of illness in the home.

Paws in specific settings

Pesticides from the lawn to indoor spaces.

Nishioka and colleagues detected 2,4-D on surfaces and in household dust after lawn applications. Transport by an active dog and the homeowner who applied the product was significant in that study.

Viruses and surfaces

Viruses on soles: detection in hospital wards.

A 2020 study in COVID-19 wards detected SARS-CoV-2 genetic material on staff shoe soles. PCR did not measure infectious virus; the study does not establish household infection through footwear.

Studies and sources. Explore findings on soles, paws and transfer into indoor spaces. View the sources.

Change the moment of action

Clean afterwards or act earlier?

Regular cleaning remains essential. HYGEN KLINX explores an additional layer: reducing transfer where it occurs by integrating treatment into the act of entering.

Home entrance with an illustration of residue that is not immediately visible

Development and testing

Measure treatment performance and verify safety.

PET KLINX and HOME KLINX are in development. Prototype tests will need to measure residue removal, treatment performance and safety under the intended use conditions.

No shortcutsHYGEN KLINX does not replace normal cleaning and maintenance of indoor environments.
No premature claimsWe do not attribute microbiological performance to a product that has not yet been validated.
A clear objectiveDesign an automated barrier and document its value through appropriate testing.