Centor / Modified McIsaac Score

Age band + four clinical signs; total roughly −1 to +5 in many teaching cards.

Age band (McIsaac adjustment)

Under 3 years (0 points in this simplified band) 3–14 years (+1 point) 15–44 years (0 points) 45 years or older (−1 point)

Centor clinical signs Tonsillar exudate (+1) Tender anterior cervical lymphadenopathy (+1) Fever or history of measured fever >38 °C (+1) Absence of cough (+1)

Do not use in infants under 3 months with fever without urgent evaluation pathways; rapid testing and local antibiotic stewardship apply.

Educational tool only—not for diagnosis or treatment decisions.

Centor / Modified McIsaac Score

Calculator

Score

How it works

Limits