Clinical trial Recruiting at 8 sites Observational Ages 2 to 11

FebriDx testing to tell viral from bacterial infections in children

Official title: FebriDx® Pediatric Validation Study Protocol

Run by Lumos Diagnostics · NCT07211997 · Data updated 2026-11-12

This study will test whether the FebriDx fingerstick test can tell bacterial from non-bacterial causes of fever in children ages 2–11 who come to emergency, urgent care, or primary care with respiratory symptoms.

More Acute Respiratory Infections (ARIs) trials

Quick facts

Study typeObservational
Ages2 Years to 11 Years
SexAll
Enrollment800 (estimated)
SponsorLumos Diagnostics
Industry-sponsored
Drugs / interventionsChemotherapy, Methotrexate
Locations10 sites (Colton, California and 9 other locations)
StatusRecruiting
StartedOctober 9, 2025
Main results expectedMarch 31, 2027
Study endsMay 30, 2027
Registry record updatedJuly 7, 2026
Trial IDNCT07211997 on ClinicalTrials.gov

Is this trial a fit for you?

Likely a good fit

Children aged 2–11 with a measured or reported fever ≥100.4°F (≥38°C) within 72 hours and new onset respiratory symptoms who present to a participating ED, urgent care, or primary care clinic and whose parent/guardian can provide consent (and assent when appropriate).

Probably not a fit

Children who are immunocompromised, have taken antibiotics or antivirals in the prior 14 days, received a live vaccine in the prior 14 days, are outside the 2–11 age range, or cannot complete follow-up are unlikely to benefit from this validation effort.

A plain-English reading of the study's rules. Only the study team can confirm whether you qualify.

What this trial studies

This is a prospective, multi-center, observational, blinded study enrolling febrile children aged 2–11 with suspected acute respiratory infections. Participants will receive a FebriDx point-of-care fingerstick test that detects MxA and CRP levels, and results will be compared to a clinical adjudication reference that includes pathogen detection (culture, PCR) and host-response measures. The primary outcome is whether a bacterial-associated systemic host immune response is present, as determined by the adjudication panel using a Clinical Reference Algorithm. Data will be collected at community EDs, urgent care centers, and primary care offices at multiple U.S. sites.

Why it matters

Potential benefit: If successful, this test could help clinicians quickly identify likely bacterial infections in children, reducing unnecessary antibiotics and enabling faster appropriate care.

How similar studies have gone: Similar FebriDx and MxA/CRP point-of-care approaches have shown promising accuracy in adults and small pediatric cohorts, but comprehensive pediatric validation is still limited.

Who can join: the full rules

Show full inclusion / exclusion criteria
Inclusion Criteria:

* Signed informed consent by parent/guardian and Assent for ages 7-11 years
* Exhibit or report of a new onset measured temperature (oral or tympanic) of greater than or equal to 100.4°F/38°C within 3 days (72 hours) of enrollment
* Clinical suspicion for Acute Respiratory Infection beginning within 7 days before enrollment AND presents with at least one of the following new onset of symptoms: runny nose, nasal congestion, sore throat, cough, hoarse voice, shortness of breath / difficulty breathing

Exclusion Criteria:

* Unwilling to participate in 7-day follow-up or sign HIPAA waiver to obtain medical record if hospitalized
* Immunocompromised state or taking immunosuppressive or chemotherapeutic medications in the last 30 days (e.g. oral / inhaled steroids, Methotrexate, Cyclosporine, Chemotherapy, interferon therapy)
* Taking antibiotics or antiviral therapy in the last 14 days
* Received a live viral immunization in the last 14 days
* Clinical diagnosis of otitis media or recognizable viral syndrome (i.e., croup, varicella, stomatitis) at the time of enrollment
* Prior enrollment in the study

Where it's running

  • PAS Research- Myrtle Avenue Pediatrics, Inc
    Clearwater, Florida, United States
    Recruiting
  • PAS Research- Sandhill Pediatrics PA
    Lutz, Florida, United States
    Recruiting
  • PAS Research
    Tampa, Florida, United States
    Recruiting
  • Hometown Urgent Care
    Huber Heights, Ohio, United States
    Recruiting
  • Hometown Urgent Care
    Springfield, Ohio, United States
    Recruiting
  • PAS Research
    Pittsburgh, Pennsylvania, United States
    Recruiting
Show 4 more locations
  • Tribe
    Charleston, South Carolina, United States
    Recruiting
  • PAS Research
    Edinburg, Texas, United States
    Recruiting
  • Avacare
    Colton, California, United States
    Not yet recruiting
  • Tribe- Parkside Pediatrics
    Greenville, South Carolina, United States
    Not yet recruiting

Study contacts

Similar studies

Other studies for the same condition or treatment. Recruiting studies are listed first.

How to take part

  1. Review the eligibility criteria above with your treating physician.
  2. Check the official listing on ClinicalTrials.gov for the latest contact details and recruitment status.
  3. Contact the study coordinator or principal investigator to ask for pre-screening. Pre-screening is free and never obligates you to enroll.
Last reviewed 2026-11-14 by the Find a Trial editorial team. Information on this page is for educational purposes and is not medical advice. Always consult qualified healthcare professionals about clinical trial participation.