Karius Spectrum Test in Febrile Neutropenia Case Study

This case study presents the application of the Karius Spectrum test in diagnosing febrile neutropenia in adult patients undergoing hematopoietic stem cell transplant. It details a specific case involving a 60-year-old male with acute myeloid leukemia who presented with neutropenic fever. The study outlines the tests performed, including fungal biomarkers and blood cultures, which returned negative results, while the Karius Spectrum test identified Mycobacterium tuberculosis complex. The outcome led to a diagnosis of extrapulmonary miliary tuberculosis, resulting in the patient receiving appropriate multi-drug therapy. Additionally, the document includes clinical evidence from multiple study sites, indicating that the Karius Spectrum test provided earlier pathogen results in a significant percentage of patients compared to standard testing. The findings suggest that the test can lead to changes in antimicrobial management in a substantial number of cases, emphasizing its potential utility in clinical settings for high-risk patients.