For Providers

At Karius, we are committed to diagnostic stewardship, which means supporting you in identifying the right patient, right test, and right time to use Karius testing solutions.

Who We Are

Karius is a clinical metagenomics company focused on helping elevate patient care through microbial insights. We are a team of infectious disease experts, including medical directors and medical science liaisons who are committed to patients, research and advancing diagnostic science.

What We Do

Karius helps healthcare providers detect pathogens by leveraging microbial cell-free DNA (mcfDNA). As microbes turn over, they shed genomic fragments in the body, leaving behind traces that hold critical clinical insights. Using metagenomic sequencing and artificial intelligence, we identify, analyze, and report these signals.

Our Product

Accelerate the Diagnostic Process with Karius Spectrum

Karius Spectrum is a blood test based on metagenomic sequencing of plasma microbial cell-free DNA that can detect over 1,000 pathogens associated with deep-seated and difficult-to-diagnose systemic infections caused by fungi, bacteria, parasites, and DNA viruses.

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Patient Populations

The main clinical application for our testing solutions is to help detect infections in both immunocompromised and immunocompetent patients.

Hematopoietic  Cell Transplantation

Hematopoietic Cell Transplantation

Solid Organ  Transplantation

Solid Organ Transplantation

Other Immunocompromised Hosts

Other Immunocompromised Hosts

Featured Evidence

Karius Spectrum in ASTCT Guidelines for Non-Aspergillus Invasive Mold Infections

Karius Spectrum in ASTCT Guidelines for Non-Aspergillus Invasive Mold Infections

ASTCT Guideline Highlights the Karius Spectrum test for infection diagnosis in patients who have undergone hematopoietic stem cell transplantation.

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Karius Spectrum for Solid Organ Transplant Recipients per AST Consensus Guidance

Karius Spectrum for Solid Organ Transplant Recipients per AST Consensus Guidance

Per consensus guidance sponsored by American Society of Transplantation: Plasma-based NGS may be useful when a focal site of infection cannot be accessed for sampling.

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Karius Test in 2023 Duke-ISCVID Criteria for Infective Endocarditis

Karius Test in 2023 Duke-ISCVID Criteria for Infective Endocarditis

First time inclusion of hypothesis-free metagenomic testing, such as the Karius Spectrum test for the rapid identification of hard-to-detect pathogens.

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Have a question about the Karius Spectrum test?

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References

  1. Hill JA, et al. Open Forum Infect Dis. 2024;11(1):ofad616.
  2. Schuster MG, et al. Open Forum Infect Dis. 2017;4(2):ofx050
  3. Zembower TR. Cancer Treat Res. 2014;161:43-89.
  4. Singh N, et al. Mandell, Douglas, and Bennett’s Principles and Practice of Infectious Diseases, 308, 3672-3697.e4.
  5. Dulek DE, Mueller NJ. Clin Transplant. 2019;33(9):e13545.
  6. Park S, et al. Open Forum Infect Dis. 2025. doi:10.1093/ofid/ofaf001.
  7. Everhart J, Henshaw NG. Infect Dis Clin North Am. 2023;37(3):495-513.
  8. Kotton CN, et al. Transplantation. 2018;102(6):900-931.
  9. Foong et al. Open Forum Infectious Diseases, 2022; ofac652
  10. Francisco D, et al. Antimicrob Steward Healthc Epidemiol. 2023 Feb 17;3(1):e31.
  11. Shah JR, et al. Ther Adv Infect Dis. 2024;11:20499361241308643. Published 2024 Dec 23.
  12. Freeman Weiss Z et al. J Fungi (Basel). 2021 Feb 9;7(2):127.
  13. Lu Y, et al. Intern Med. 2011;50(22):2783-91. Epub 2011 Nov 15.
  14. Leeflang MMG, et al. Cochrane Database Syst Rev. 2015 Dec 30; 2015(12): CD007394.
  15. Caliendo AM, et al. Clin Infect Dis. 2013;57 Suppl 3:S139-170
  16. Fung M, et al. Open Forum Infect Dis. 2018;5(12): ofy301
  17. Yadegarynia D, et al. Clin Infect Dis. 2003;37(8):1144-1145
  18. Bauer PR et al. Eur Respir J. 2019;54(1)
  19. Batra S et al. Pediatr Blood Cancer. 2015;62(9):1579-1586
  20. Hofmeister CC et al. Bone Marrow Transplant. 2006;38(10):693-698
  21. Patel NR et al. Chest. 2005;127(4):1388-1396