Centor Score (Modified/McIsaac) Calculator

Clinical use

Use this calculator for strep pharyngitis probability in theinfectious disease workflow. It is decision support and should be interpreted with the patient context, local protocols, and clinician judgment.

Interpretation

Score 0-1: no testing or antibiotics. 2-3: consider rapid strep test. 4-5: empiric antibiotics reasonable. McIsaac modification adjusts for age (<15: +1, >44: −1).

Required inputs

• Tonsillar Exudates
• Tender Anterior Cervical Nodes
• Fever History
• Absence Of Cough
• Age

Evidence and limitations

This page cites 2 published references. Confirm units and inclusion criteria before applying the output; calculators do not replace assessment, escalation, or local policy.