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New study aims to unlock the mystery of strep carriers in kids

NCT ID NCT01558804

Knowledge-focused Sponsor: University of Wisconsin, Madison Source: ClinicalTrials.gov ↗

What the study statuses mean

This study's is highlighted.

Recruitment status, easiest to join first

Recruiting now This study
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
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 Results may not be published yet.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This status has not been confirmed recently, so it may be out of date.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 27, 2026 · Last updated Jun 27, 2026

Summary

This study looks at children ages 5 to 15 who test positive for strep throat to understand why some become carriers—meaning they have the bacteria but no symptoms. Researchers will collect throat samples and analyze gene activity to compare carriers with those who have active infections. The goal is to learn whether carriers need antibiotics, which could reduce unnecessary treatment.

What this could mean

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

What this could lead to
If successful, this study could help doctors better understand strep carriage in children and decide when antibiotics are truly needed.
What could go wrong
This is an observational study, not a treatment trial. It will not directly test any new therapy, and results may not change current medical practice.

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.

Participants

About 180 people

The number the study aims to enrol. It can still change while the study runs.

Started

May 2011

Expected to finish

Jun 2028

An estimate. End dates often move.

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.

Who is studied

Children will be eligible for this study if they are ages 5 to 15 years and have been diagnosed to have acute pharyngitis caused by GAS (with a positive rapid antigen detection test (RADT). Children will be excluded if they are unable to take beta lactam antibiotics. Children will be enrolled at UW Health sites in Madison, Wisconsin, including both pediatric ambulatory care clinics and urgent care clinics. The study team will offer participants the option to complete follow-up study visits in-clinic

Ages

5 to 15 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 ages 5-15 years * Positive rapid antigen detection test for group A streptococcus * Parent or legal guardian present and able to provide consent * Provider prescribes treatment with a beta lactam antibiotic * English speaking Exclusion Criteria: * Unable to take beta lactam antibiotics * Other concurrent bacterial infection, i.e., pneumonia

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Conditions

The condition(s) this trial relates to.

streptococcal sore throat

As listed by the trial registrant

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

Streptococcal pharyngitis

How to take part

Only the study team decides who joins. These are the ways to reach them.

  1. The places running it

    1 site. The list below names each one and where it is.

  2. The official record

    ClinicalTrials.gov lists the study team's own contact details, including names and phone numbers. We don't republish those.

    Open the record ↗

  3. A doctor treating you

    A doctor who knows your case can contact a study site on your behalf, and can tell you whether this study is worth pursuing at all.

Contacts and locations

Locations

  • UW Health Pediatric Clinics

    RECRUITING

    Madison, Wisconsin, 53717, United States

More trials for these conditions

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