Karius Spectrum Test for Fever of Unknown Origin

This document is a case study detailing the application of the Karius Spectrum test in diagnosing Fever of Unknown Origin (FUO) in pediatric and adult patients. It presents findings from multiple studies conducted at various medical centers, including Driscoll Children’s Hospital, Mayo Clinic, and Baylor St. Luke’s Medical Center. The Karius Spectrum test demonstrated a positive clinical impact on diagnosis in 32% of pediatric patients with FUO and led to a change in antimicrobial management in 72% of adult hospitalized patients. The test was noted for its ability to provide results in cases where other diagnostic modalities failed, identifying pathogens such as Streptococcus pneumoniae and C. burnetii. The document outlines specific considerations for using the Karius Spectrum test, particularly in high-risk patients or those with prolonged fever despite prior workup. It emphasizes the importance of clinical evaluation and the test's role in managing complex infectious cases.