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.
Quick facts
| Study type | Observational |
|---|---|
| Ages | 2 Years to 11 Years |
| Sex | All |
| Enrollment | 800 (estimated) |
| Sponsor | Lumos Diagnostics Industry-sponsored |
| Drugs / interventions | Chemotherapy, Methotrexate |
| Locations | 10 sites (Colton, California and 9 other locations) |
| Status | Recruiting |
| Started | October 9, 2025 |
| Main results expected | March 31, 2027 |
| Study ends | May 30, 2027 |
| Registry record updated | July 7, 2026 |
| Trial ID | NCT07211997 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
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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
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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
- Study coordinator: Catalina Suarez-Cuervo, MD
- Email: Clinicalstudies@lumosdiagnostics.com
- Phone: 7277765885
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How to take part
- Review the eligibility criteria above with your treating physician.
- Check the official listing on ClinicalTrials.gov for the latest contact details and recruitment status.
- Contact the study coordinator or principal investigator to ask for pre-screening. Pre-screening is free and never obligates you to enroll.