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Washing therapy dogs may keep hospital germs away from kids

NCT ID NCT04171817

Disease control Sponsor: Johns Hopkins Bloomberg School of Public Health Source: ClinicalTrials.gov ↗

What the study statuses mean

This study's is highlighted.

Recruitment status, easiest to join first

Recruiting now
This trial is taking on new participants right now.
Not yet recruiting
Registered, but not yet taking participants.
By invitation only
Not open to general applications. Only people the study team invites can take part.
Paused
Paused for now. It may or may not start again.
Ongoing
Running, but no longer taking on new participants.
Completed This study
The trial has finished. Results may not be published yet.
Stopped early
Stopped early, before it reached the end. That can be for many reasons, including safety.
Cancelled
Cancelled before anyone took part.

Expanded access (not trials)

Expanded access
Not a trial. This treatment can be requested outside a study, case by case, for people who qualify.
Expanded access (paused)
Not a trial. The treatment can normally be requested outside a study, but is unavailable right now.
Expanded access (ended)
Not a trial. The treatment could once be requested outside a study, but no longer can.
Approved
The treatment has been approved, so it is available normally rather than through this programme.

When the status isn't known

Details not published
The full record has not been published yet, so there is little to show here.
Status unknown
This status has not been confirmed recently, so it may be out of date.

First seen Jun 26, 2026 · Last updated Jun 27, 2026 · Updated 1 time

Summary

This study tested whether cleaning therapy dogs with a special disinfectant (chlorhexidine) before hospital visits could reduce the spread of harmful germs to children. The trial involved 45 children aged 3 to 17 who interacted with therapy dogs. Researchers checked if the cleaning routine lowered the chance of kids picking up bacteria like MRSA from the dogs.

What this could mean

Our plain-language read of the trial. This is informational only, not medical advice or a prediction.

Active substance
chlorhexidine
What this could lead to
If it works, this could help keep therapy dog visits safe for children in hospitals by reducing the spread of germs.
What could go wrong
This is a small, completed study with only 45 participants, so results may not apply to all hospitals or patients. The cleaning routine might not fully prevent germ spread.

This is an AI summary of the original study and may miss details. Read our disclaimer.

Study facts

What this study's own registry entry says, in plain language.

Phase

Phase 4

Runs after approval, following long-term safety and how well the treatment works in everyday use.

Participants

45 people

The number who actually took part.

Started

May 2023

Finished

Apr 2026

Lead sponsor

Other sponsor

The registry's catch-all category, for sponsors it does not file as a company, a government agency, or a research network.

Who can take part

This study's own entry requirements. Only the study team can say for certain whether you qualify.

Ages

3 to 17 years

Sex

Anyone

Healthy volunteers

Not accepted

This study is not open to healthy volunteers. The entry requirements below say who it is open to.

Show the full entry requirements

Copied word for word from the study's registry entry, so the wording is the study team's rather than ours.

Inclusion Criteria: * Children between the ages of 3 and 17 years * Cleared by physician to participate in a hospital-based animal-assisted visitation program session with any enrolled dog Exclusion Criteria: * Children who report sensitivity to chlorhexidine products * Children who report allergy to dogs or sensitivity to dog allergen

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Conditions

The condition(s) this trial relates to.

Clostridium difficile colitis methicillin-resistant staphylococcus aureus infectious disease Pseudomonas aeruginosa infectious disease Pseudomonas infection

As listed by the trial registrant

The condition terms exactly as the trial's registrant entered them.

Clostridium difficile Methicillin resistant staphylococcus aureus Pseudomonas aeruginosa

Contacts and locations

Locations

  • Children's Hospital of Philadelphia

    Philadelphia, Pennsylvania, 19104, United States

  • Johns Hopkins

    Baltimore, Maryland, 21205, United States

  • Washington University in St. Louis

    St Louis, Missouri, 63110, United States

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