Recognition of streptococcal pharyngitis in adults

Area of Science:

• Medicine
• Infectious Diseases
• Clinical Diagnostics

Background:

• Acute pharyngitis is a common condition, often caused by group A beta-hemolytic streptococci (GABHS).
• Accurate diagnosis is crucial for appropriate management and preventing complications.

Purpose of the Study:

• To develop a clinical strategy for managing acute pharyngitis.
• To identify key clinical features differentiating GABHS from other causes of sore throat.

Main Methods:

• Clinical features of 418 adults with sore throat were recorded.
• Throat cultures were obtained to identify GABHS.
• A clinical algorithm and discriminant function scores were developed.

Main Results:

• Patients with GABHS-positive cultures showed higher frequencies of exposure, pharyngeal exudate, tender cervical nodes, and fever (≥38.3°C).
• Patients with negative cultures more frequently reported cough.
• The developed algorithm identified moderate-to-high probability groups containing 91% of positive cultures but only 67% of all patients.

Conclusions:

• A clinical algorithm based on specific symptoms and signs can effectively stratify patients by their probability of GABHS pharyngitis.
• This approach offers a more efficient method for evaluating adults presenting with sore throat.