 The modified Centor score is a valid tool to estimate the probability of acute streptococcal pharyngitis in patients with a sore throat. reference Patients with a score of zero or 1 are at very low risk for streptococcal pharyngitis and do not require testing i.e., throat culture or rapid antigen detection testing RADT or antibiotic therapy. Patients with a score of 2 or 3 should be tested using RADT or throat culture; positive results warrant antibiotic therapy. Patients with a score of 4 or higher are at high risk of streptococcal pharyngitis, and empiric treatment may be considered. reference 