Modified Centor (McIsaac) Score

Name: Modified Centor (McIsaac) Score
Creator: Daniel Diaz-Gil, MD
Keywords: Centor, McIsaac, strep, pharyngitis, sore throat, GAS, group A streptococcus, infectious disease, pediatric

Estimates probability of group A streptococcal pharyngitis with age-adjusted McIsaac modification

Clinically Verified· 6 tests

For educational and informational purposes only. Verify all results before clinical application.

Age *

years

Fever >38°C *

Absence of Cough *

Tonsillar Exudate *

Cervical Lymphadenopathy *

References

McIsaac WJ, Kellner JD, Aufricht P, et al. Empirical validation of guidelines for the management of pharyngitis in children and adults. JAMA. 2004;291(13):1587-1595.[DOI]
Centor RM, Witherspoon JM, Dalton HP, et al. The diagnosis of strep throat in adults in the emergency room. Med Decis Making. 1981;1(3):239-246.[DOI]
Shulman ST, et al. Clinical Practice Guideline for the Diagnosis and Management of Group A Streptococcal Pharyngitis. Clin Infect Dis. 2012;55(10):e86-e102.[DOI]

Reviewed by Daniel Diaz-Gil, MD · Last updated March 2026

Medical disclaimer

This tool is for educational and informational purposes only. It is not a substitute for professional clinical judgment. Always independently verify results before making clinical decisions.

Professional Resources — Tools used by pediatricians for infectious disease management

Red Book: Report of the Committee on Infectious Diseases (AAP)AAP guidelines for pediatric infectious disease~$110via Amazon Vancomycin Dosing Reference CardQuick-reference for pediatric vancomycin dosing and monitoring~$10via Amazon