Risk stratification biomarkers for Staphylococcus aureus bacteraemia.

Journal Article (Journal Article)

Objectives: To identify risk stratification biomarkers to enrich for the subset of Staphylococcus aureus bacteraemia patients who develop deep-seated tissue infections with high morbidity and mortality to guide clinical trial enrolment and clinical management. Methods: We evaluated the prognostic value of eight biomarkers for persistent bacteraemia, mortality and endovascular infection foci in a validation cohort of 160 patients with S. aureus bacteraemia enrolled consecutively over 3 years. Results: High levels of IL-17A, IL-10 or soluble E-selectin at bacteraemia diagnosis correlated with the duration of positive blood cultures. When thresholds defined in an independent cohort were applied, these biomarkers were robust predictors of persistent bacteraemia or endovascular infection. High serum levels of IL-17A and IL-10 often preceded the radiographic diagnosis of infective endocarditis, suggesting potential utility for prioritising diagnostic radiographic imaging. High IL-8 was prognostic for all-cause mortality, while IL-17A and IL-10 were superior to clinical metrics in discriminating between attributable mortality and non-attributable mortality. High IL-17A and IL-10 identified more patients who developed microbiological failure or mortality than were identified by infective endocarditis diagnosis. Conclusion: These biomarkers offer potential utility to identify patients at risk of persistent bacteraemia to guide diagnostic imaging and clinical management. Low biomarker levels could be used to rule out the need for more invasive TEE imaging in patients at lower risk of infective endocarditis. These biomarkers could enable clinical trials by enriching for patients with the greatest need for novel therapies.

Full Text

Duke Authors

Cited Authors

  • Cao, Y; Guimaraes, AO; Peck, MC; Mayba, O; Ruffin, F; Hong, K; Carrasco-Triguero, M; Fowler, VG; Maskarinec, SA; Rosenberger, CM

Published Date

  • 2020

Published In

Volume / Issue

  • 9 / 2

Start / End Page

  • e1110 -

PubMed ID

  • 32082571

Pubmed Central ID

  • PMC7018520

International Standard Serial Number (ISSN)

  • 2050-0068

Digital Object Identifier (DOI)

  • 10.1002/cti2.1110


  • eng

Conference Location

  • Australia