Duke Criteria (Endocarditis) Calculator

Duke Criteria (Endocarditis) Calculator for Infectious Disease. Clinical combinations support a diagnostic framework rather than independent confirmation. Pathological evidence, antibiotic exposure, repeat investigations and the overall course require separate consideration. A low count after an incomplete workup is particularly unsuitable for reassurance.

For shared guidance on choosing a tool and documenting results, read the clinical calculator workflow.

How this calculator works

The 2023 Duke-ISCVID clinical combination is definite with at least two major criteria, one major plus at least three minor criteria, or at least five minor criteria. A possible combination uses one major plus at least one minor criterion, or at least three minor criteria. The interface caps counts at the largest value needed for these Boolean comparisons.

When to use this calculator

Use only after adjudicating distinct criteria with the complete 2023 framework. The update includes modern microbiology and imaging definitions and conditional surgical evidence; an older checklist cannot simply be renamed. This tool checks the combination of supplied counts and does not decide whether a particular culture or scan qualifies.

Inputs used

  • Criteria adjudicated using the full 2023 definitions without duplicate counting?
  • Distinct qualifying major criteria (enter 2 for 2 or more)
  • Distinct qualifying minor criteria (enter 5 for 5 or more)

Clinical interpretation

Clinical combinations support a diagnostic framework rather than independent confirmation. Pathological evidence, antibiotic exposure, repeat investigations and the overall course require separate consideration. A low count after an incomplete workup is particularly unsuitable for reassurance.

Worked example

One adjudicated major criterion and three minor criteria returns a definite clinical combination. One major and two minor returns possible. With no major and two minor the count is below the combination threshold, but the interface does not declare endocarditis rejected. Selecting an incomplete assessment prevents classification.

Limitations and safety notes

The tool does not implement pathological or formal rejection criteria, and it cannot detect every duplicate count. Enter categories once rather than counting every positive specimen as a new criterion. Source definitions and copyrighted tables are linked, not reproduced; no endorsement, licensing grant or independent clinical validation is implied.

Frequently asked questions

Why does a low count not say rejected?

This limited count interpreter cannot establish completion of the diagnostic workup or adjudicate all formal rejection criteria.

Can an old Duke worksheet supply the counts?

Not without reassessment against the 2023 definitions. Their qualifying evidence is not identical.

What if there are more than two major criteria?

Enter 2, the highest major count required by this combination logic. Preserve the full evidence separately.

References

  • 2023 Duke-ISCVID primary consensus: definite and possible clinical combinations, updated qualifying evidence and distinct pathological pathway. https://academic.oup.com/cid/article/77/4/518/7151107
  • ISCVID-hosted source paper: clinical combinations and conditional surgical evidence; full criteria not reproduced. https://www.iscvid.org/wp-content/uploads/2023/07/2023-The-2023-Duke-ISCVID-Criteria-for-Infective-Endocarditis-Fowler-CID-May-4-2023-Final.pdf

Editorial review and citation methodology

Maintained by the Quick Medical Calculator Editorial Team. Content record date: September 9, 2026. A content date is not evidence of independent clinical review. Individual clinical sign-off is not recorded on this page.

  • Prefer original validation studies for scoring systems and prediction tools.
  • Use current specialty society guidance, transplant allocation policy, public health guidance, or regulator resources when they govern clinical use.
  • Include limitations and safety notes when a calculator is population-specific, context-dependent, or unsuitable as a standalone decision tool.

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