Validation of a 2-Gene Blood Test for Kawasaki Disease in Febrile Children.
A blood test accurately identifies Kawasaki disease in febrile children, offering doctors an objective tool to confirm this serious childhood illness sooner.
A multicenter validation of a whole-blood 2-gene qPCR assay (IFI27+MCEMP1) in 541 children demonstrated AUC 0.91, 94% sensitivity, and 82% specificity for Kawasaki disease diagnosis—the first objective molecular test to approach clinical utility for this clinically diagnosed disease. Performance was consistent across incomplete KD, diverse febrile control etiologies, and coronary phenotypes, with high analytical precision and 6-day sample stability.
What the study was
- Study design
- Multicenter diagnostic validation study
- Population
- Children <8 years with Kawasaki disease and febrile controls (Taiwan + Shanghai)
- Sample size
- 541
- Category
- Diagnostics
- Maturity
- Validated
- Journal
- JAMA Netw Open
Why it surfaced
Kawasaki disease is currently a clinical diagnosis with no molecular test, yet delayed diagnosis drives coronary artery complications. This multicenter validation (n=541, Taiwan+Shanghai) across real-world febrile pediatric presentations demonstrates analytical readiness as a laboratory-developed test. JAMA Network Open, validation study design, strong performance metrics.
A plain-language summary of published research — not medical advice. Talk to a clinician about your own care.