At an early stage redness of throat and tonsils is observed, and the cervical lymph glands become enlarged. The clinical manifestations may vary by causative agent (see Microbiological causes section ), but are rarely specific. Erythema is common to most agents, however the occurrence of ulceration, petichiae, exudation or follicles varies. The common features are: exudative pharyngitis in GAHBS infection, ulcerative lesions in enteroviruses, and membranous pharyngitis in C. diphtheriae. Petechiae can often be seen in GABHS, Epstein-Barr, measles and rubella viruses infections.
Rapid method for detection of GABHS